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United States Department of Agriculture

Agricultural Research Service

Thomas G McCollum
Research Physiologist


Publications (Clicking on the reprint icon Reprint Icon will take you to the publication reprint.)
Correlation of Diplodia (Lasiodiplodia theobromae) infection, huanglongbing, ethylene production, fruit removal force and pre-harvest fruit drop -
Zhao, W., Gottwald, T.R., Bai, J., Mccollum, T.G., Plotto, A., Baldwin, E.A. 2016. Correlation of Diplodia (Lasiodiplodia theobromae) infection, huanglongbing, ethylene production, fruit removal force and pre-harvest fruit drop. Scientia Horticulturae. 212:162-170 http:dx.doi.org/10.1016/j.scienta.2016.09.032.
Anaerobic soil disinfestation: Carbon rate effects on tomato plant growth and organic acid production -
Molecular responses to small regulating molecules against Huanglongbing disease -
Martinelli, F., Dolan, D., Fileccia, V., Reagan, R., Phu, M., Spann, T., Mccollum, T.G., Dandekar, A. 2016. Molecular responses to small regulating molecules against Huanglongbing disease. PLoS One. 11(7):e0159610. doi:10.1371/journal.pone.0159610.
Early detection of CLas infections in citrus -
Use of digital PCR to improve early detection of CLas infection -
McCollum, T.G., Levesque, C., Godfrey, K. 2016. Use of digital PCR to improve early detection of CLas infection. Citrograph. 7(3):48-52.
Variation within and among laboratories in detection of Candidatus Liberibacter asiaticus using qPCR -
Performance of 'Valencia' Orange (Citrus sinensis [L.] Osbeck) on 17 rootstocks in a trial severely affected by huanglongbing -
Bowman, K.D., McCollum, T.G., Albrecht, U. 2016. Performance of 'Valencia' orange (Citrus sinensis [L.] Osbeck) on 17 rootstocks in a trial severely affected by huanglongbing. Scientia Horticulturae. 201:355-361.
Developing resistance to HLB -
Ramadugu, C., Keremane, M.L., Mccollum, T.G., Hall, D.G., Roose, M. 2016. Developing resistance to HLB. Citrograph. 7(2):46-51.
Changes in volatile and non-volatile flavor chemicals of "Valencia" orange juice over the harvest seasons -
Bai, J., Baldwin, E.A., Mccollum, T.G., Plotto, A., Manthey, J.A., Widmer, W., Luzio, G., Cameron, R.G. 2016. Changes in volatile and non-volatile flavor chemicals of "Valencia" orange juice over the harvest seasons. Foods. 5,4;doi:10.3390/foods5010004.
Susceptibility of sixteen citrus genotypes to Candidatus Liberibacter asiaticus -
Mccollum, T.G., Hilf, M.E., Irey, M., Weiqu, L., Gottwald, T.R. 2016. Susceptibility of sixteen citrus genotypes to Candidatus Liberibacter asiaticus. Plant Disease. 100(6):1080-1086.
Huanglongbing: a devastating disease of citrus -
Five new citrus rootstocks with improved tolerance to huanglongbing -
Bowman, K.D., Mccollum, T.G. 2015. Five new citrus rootstocks with improved tolerance to huanglongbing. HortScience. 50:1731-1734.
Citrus Huanglongbing tolerance in Australian Citrus Relatives, Microcitrus and Eremocirus -
What's in a Number? Estimating numbers of viable Candidatus Liberibacter asiaticus cells in citrus and ACP -
Mccollum, T.G., Hilf, M.E. 2015. What's in a Number? Estimating numbers of viable Candidatus Liberibacter asiaticus cells in citrus and ACP. Citrograph. 6(2):36-40.
Huanglongbing increases Diplodia Stem End Rot in Citrus sinensis -
Zhao, W., Bai, J., Mccollum, T.G., Baldwin, E.A. 2014. Huanglongbing increases Diplodia Stem End Rot in Citrus sinensis. Proceedings of Florida State Horticultural Society. 127:135-138.
Early detection of HLB with metabolomics -
Chin, E., Lobo, R., Da Graca, J., Hilf, M.E., McCollum, T.G., LeVesque, C., Godfrey, K., Slupsky, C. 2015. Early detection of HLB with metabolomics. Citrograph. 6:32-34.
Growth, health and Liberibacter asiaticus titer in diverse citrus scions on mandarin vs. trifoliate hybrid rootstocks in a field planting with severe huanglongbing -
Stover, E.W., Mccollum, T.G., Ramos, J.E., Shatters, R.G. 2015. Growth, health and Liberibacter asiaticus titer in diverse citrus scions on mandarin vs. trifoliate hybrid rootstocks in a field planting with severe huanglongbing. Proceedings of Florida State Horticultural Society. 127:53-59.
Development of delayed bitterness and effect of harvest date in stored juice from two complex citrus hybrids -
Raithore, S., Dea, S., Mccollum, T.G., Manthey, J.A., Bai, J., Leclair, C., Hijaz, F., Narciso, J., Baldwin, E.A., Plotto, A. 2016. Development of delayed bitterness and effect of harvest date in stored juice from two complex citrus hybrids. Journal of the Science of Food and Agriculture. 96:422-429.
High incidence of preharvest colonization of huanglongbing-symptomatic Citrus sinensis fruit by Lasiodiplodia theobromae (Diplodia natalensis) and exacerbation of postharvest fruit decay by that fungus -
Zhao, W., Bai, J., Mccollum, T.G., Baldwin, E.A. 2015. High incidence of preharvest colonization of huanglongbing-symptomatic Citrus sinensis fruit by Lasiodiplodia theobromae (Diplodia natalensis) and exacerbation of postharvest fruit decay by that fungus. Applied and Environmental Microbiology. 81(1):364-372.
Cyclic lipopeptides from Bacillus subtilis ABS-S14 elicit defense-related gene expression in citrus fruit -
Waewthongrak, W., Mccollum, T.G., Leelasuphakul, W. 2014. Cyclic lipopeptides from Bacillus subtilis ABS-S14 elicit defense-related gene expression in citrus fruit. PLoS One. 9(10):1-11.
Pre- and Postharvest Quality Problems Associated with Greening in Sweet Orange Fruits -
‘US Furr’ and ‘US Furr-ST’ Mandarin -
Furr, J., Reece, P., Kahn, T., Siebert, T., Barry, G., McCollum, G., Castle, W., Stover, E. 2014. ‘US Furr’ and ‘US Furr-ST’ mandarin. Journal of American Pomological Society. 68:198-203
Anaerobic Soil Disinfestation (ASD) Combined with Soil Solarization as a Methyl Bromide Alternative: Vegetable Crop Performance and Soil Nutrient Dynamics -
Butler, D.M., Burelle, N.K., Albano, J.P., McCollum, T.G., Muramoto, J., Shennan, C., Rosskopf, E.N. 2014. Anaerobic Soil Disinfestation (ASD) Combined with Soil Solarization as a Methyl Bromide Alternative: Vegetable Crop Performance and Soil Nutrient Dynamics. Plant and Soil. 378:365-381.
Investigating the Parentage of ‘Orri’ and ‘Fortune’ Mandarin Hybrids Reprint Icon -
Barry, G.H., Gmitter, F.J., Chen, C., Roose, M.L., Federici, C.T., Mccollum, T.G. 2015. Investigating the Parentage of ‘Orri’ and ‘Fortune’ Mandarin Hybrids. Acta Horticulturae. 1065:449-456.
Resistance and tolerance to huanglongbing in citrus -
Stover, E.W., McCollum, T.G., Driggers, R.E., Lee, R.F., Shatters, R.G., Duan, Y.P, Ritenour, M.A., Chaparro, J., Hall, D.G. 2015. Resistance and tolerance to huanglongbing in citrus. Acta Horticulturae. 1065:899-903.
Structural characterization of the thermally-tolerant pectin methylesterase purified from Citrus sinensis fruit and its gene sequence -
Savary, B.J., Vasu, P., Cameron, R.G., Mccollum, T.G., Nunez, A. 2013. Structural Characterization of the Thermally-Tolerant Pectin Methylesterase Purified from Citrus sinensis Fruit and Its Gene Sequence. Journal of Agricultural and Food Chemistry. 61:12711-12719.
Secondary metabolite composition in Citrus x Poncirus trifoliata hybrids -
Deterre, S., Mccollum, T.G., Leclair, C., Bai, J., Manthey, J.A., Salvatore, J.J., Raithore, S., Baldwin, E.A., Plotto, A. 2014. Secondary metabolite composition in Citrus x Poncirus trifoliata hybrids. Proceedings of Florida State Horticultural Society. 126:206-215.
Update on USDA advanced citrus scion selections for Indian River Citrus League -
Stover, E., McCollum, G., Driggers, R., Salvatore, J. 2013. Update on USDA advanced citrus scion selections for Indian River Citrus League. River Ramblings: The Indian River Citrus League Newsletter, May 2013, p.5.
HLB resistance and tolerance in citrus scion development at the U.S. Horticultural Research Laboratory -
Stover, E., McCollum, G. 2013. HLB resistance and tolerance in citrus scion development at the U.S. Horticultural Research Laboratory. http://www.growingproduce.com/video/c:223/florida-citrus-show/
Physiological effects of Squash vein yellowing virus infection on watermelon -
Adkins, S.T., Mccollum, T.G., Albano, J.P., Kousik, C.S., Baker, C.A., Webster, C.G., Roberts, P.D., Webb, S.E., Turechek, W.W. 2013. Physiological effects of Squash vein yellowing virus infection on watermelon. Plant Disease. 97(9):1137-1148.
Breeding for resistance/tolerance to HLB within citrus -
Candidatus Liberibacter asiaticus titers in citrus cultivars in the field and in Asian citrus psyllid (ACP) inoculated greenhouse trees -
Mccollum, T.G., Hilf, M.E., Stover, E.W., Irey, M. 2013. Candidatus Liberibacter asiaticus titers in citrus cultivars in the field and in Asian citrus psyllid (ACP) inoculated greenhouse trees. 2013 International Research Conference on Huanglongbing, February 4-7, 2013, Orlando, Florida.
Screening antimicrobial peptides in-vitro for use in developing transgenic citrus resistant to huanglongbing and citrus canker -
Stover, E., Stange, R.R., McCollum, T.G., Jaynes, J., Irey, M., Mirkov, E. 2013. Screening antimicrobial peptides in-vitro for use in developing transgenic citrus resistant to huanglongbing and citrus canker. Journal of the American Society for Horticultural Science. 138:142-148.
HLB resistance and tolerance in citrus scion development at the US Horticultural Research Laboratory -
Stover, E.W., Mccollum, T.G. 2013. HLB resistance and tolerance in citrus scion development at the US Horticultural Research Laboratory [abstract]. Florida Citrus Show, January 23-24, 2013, Ft. Pierce, FL.
Huanglongbing resistance and tolerance in citrus -
Stover, E., McCollum, G., Driggers, R., Duan, Y., Shatters, R., Ritenour, M., Hall, D.G., Chaparro, J. 2013. Huanglongbing resistance and tolerance in citrus. In: Proceedings of the International Research Conference on Huanglongbing, p. 10.1, February 4-8, 2013, Orlando, Florida. Available: http://irchlb.org/files/74c98989-2bd2-4222-b.pdf
Gas chromatography-olfactometry analyses of volatiles produced by ‘Fallglo’ and ‘US Early Pride’ mandarins -
Leclair, C., Plotto, A., Mccollum, T.G., Bai, J., Biotteau, A., Baldwin, E.A., Reyes-De-Corcuera, J., Chervin, C. 2012. Gas chromatography-olfactometry analyses of volatiles produced by ‘Fallglo’ and ‘US Early Pride’ mandarins. Proceedings of Florida State Horticultural Society. 125:264-271.
A comparative study of ‘Fallglo’ and its seedless mutation ‘US Early Pride’ tangerines by sensory evaluation -
Biotteau, A., Leclair, C., Plotto, A., Mccollum, T.G. 2012. A comparative study of ‘Fallglo’ and its seedless mutation ‘US Early Pride’ tangerines by sensory evaluation. Proceedings of Florida State Horticultural Society. 125:272-275.
Impacts of alternative cropping systems on fruit quality: Opportunities for collaborative research -
Mccollum, T.G., Rosskopf, E.N., Burelle, N.K., Bausher, M.G., Butler, D. 2012. Impacts of alternative cropping systems on fruit quality: Opportunities for collaborative research. Proceedings of Florida State Horticultural Society. 125:295-299.
A dark incubation period is important for Agrobacterium-mediated transformation of mature internode explants of sweet orange, grapefruit, citron, and a citrange rootstock -
Hert, M.M., Bowman, K.D., Mirkov, T., Evens, T.J., Niedz, R.P., Mccollum, T.G. 2012. A dark incubation period is important for Agrobacterium-mediated transformation of mature internode explants of sweet orange, grapefruit, citron, and a citrange rootstock. PLoS One. 7(10):1-11.
Conventional and transgenic resistance/tolerance to Huanglongbing in citrus -
Under severe citrus canker and HLB (Huanglongbing) pressure, Triumph and Jackson perform better than Flame and Marsh grapefruit -
Resistance and tolerance to huanglongbing in citrus -
Under severe HLB and citrus canker pressure, 'Triumph' and 'Jackson' perform better than 'Flame' and 'Marsh' grapefruit -
Stover, E., McCollum, G., Chaparro, J., Ritenour, M. 2013. Under severe HLB and citrus canker pressure, Triumph and Jackson perform better than Flame and Marsh grapefruit. Proceedings of the Florida State Horticultural Society. 125:40-46.
Metabolomic analysis of citrus infection by Candidatus Liberibacter reveals insight into pathogenicity -
Slisz, A., Breksa III, A.P., Mishchuk, D.O., McCollum, T.G., Slupsky, C.M. 2012. Metabolomic analysis of citrus infection by Candidatus Liberibacter reveals insight into pathogenicity. Journal of Proteome Research. 11(8):4223-4230.
Quantification of Candidatus Liberibacter asiaticus in plant extracts – from Ct to biologically meaningful units -
Impact of anaerobic soil disinfestations combined with soil solarization on plant-parasitic nematodes and introduced inoculum of soilborne plant pathogens in raised-bed vegetable production -
Butler, D., Burelle, N.K., Muramoto, J., Shennan, C., Mccollum, T.G., Rosskopf, E.N. 2012. Impact of anaerobic soil disinfestation combined with soil solarization on plant-parasitic nematodes and introduced inoculum of soilborne plant pathogens in raised-bed vegetable production. Crop Protection Journal. 39(1):33-40.
Grafting as a Production System Component for Nematode Management in Florida Vegetables -
Impacts of Alternative Cropping Systems on Fruit Quality: Opportunities for Collaborative Research -
Sensory evaluation of tangerine hybrids at multiple harvests -
Plotto, A., Baldwin, E.A., Mccollum, T.G., Gmitter, F. 2011. Sensory evaluation of tangerine hybrids at multiple harvests. Proceedings of Florida State Horticultural Society. 124:260-263.
Influence of rootstock variety on huanglongbing disease development in field-grown sweet orange (Citrus sinensis L.) osbeck trees -
Albrecht, U., Mccollum, T.G., Bowman, K.D. 2012. Influence of rootstock variety on huanglongbing disease development in field-grown sweet orange (Citrus sinensis L.) osbeck trees. Scientia Horticulturae. 138:210-220.
Inconsequential effect of nutritional treatments on Huanglongbing control, fruit quality, bacterial titer and disease progress Reprint Icon -
Gottwald, T.R., Graham, J.H., Mccollum, T.G., Wood, B.W., Irey, M.S. 2012. Inconsequential effect of nutritional treatments on Huanglongbing control, fruit quality, bacterial titer and disease progress. Crop Protection Journal. 36:73-82.
First Report of Macrophomina phaseolina Causing Leaf and Stem Blight of Tropical Soda Apple in Florida. -
Iriarte, F.B., Rosskopf, E.N., Hilf, M.E., Mccollum, T.G., Albano, J.P., Adkins, S.T. 2007. First Report of Macrophomina phaseolina Causing Leaf and Stem Blight of Tropical Soda Apple in Florida.. Plant Health Progress. doi:10.1094/PHP-2007-1115-01-BR.
Survival of adult Asian citrus pysllid on harvested citrus fruit and leaves -
Hall, D.G., Mccollum, T.G. 2011. Survival of adult Asian citrus pysllid on harvested citrus fruit and leaves. Florida Entomologist. 94:1094-1096.
Incidence and severity of huanglongbing and Candidatus Liberibacter asiaticus titer among field-infected citrus cultivars -
Stover, E., McCollum, G. 2011. Incidence and severity of huanglongbing and Candidatus Liberibacter asiaticus titer among field-infected citrus cultivars. HortScience. 46:1344-1348.
'US Early Pride', a very low-seeded, early-maturing mandarin hybrid -
Mccollum, T.G., Hearn, C.J. 2011. 'US Early Pride', a very low-seeded, early-maturing mandarin hybrid. HortScience. 46(12):1695-1697.
Levels of Candidatus Liberibacter asiaticus and Xanthomonas citri in diverse citrus genotypes and relevance to potential transmission from pollinations -
Stover, E.W., McCollum, T.G. 2011. Levels of Candidatus Liberibacter asiaticus and Xanthomonas citri in diverse citrus genotypes and relevance to potential transmission from pollinations. HortScience. 46(6):854-857.
Candidatus Liberibacter asiaticus (CLas) titer in field HLB-exposed commercial citrus cultivars -
Stover, E., McCollum, T. 2011. Candidatus Liberibacter asiaticus (CLas) titer in field HLB-exposed commercial citrus cultivars. In: Proceedings of the 2nd International Research Conference on Huanglongbing, January 10-14, Orlando, Florida, 11.9, p. 205. Available: http://www.plantmanagementnetwork.org/proceedings/irchlb/2011.
First steps towards rescuing Las-infected citrus germplasm -
McCollum, T.G., Stover, E.W. 2013. First steps towards rescuing Las-infected citrus germplasm. International Research Conference on Huanglongbing. In: Proceedings of the Internatinal Research Conference on Huanglongbing, January 11-14, 2011, Orlando, Florida. p. 5.
Evaluation of Liberibacter titer in field-infected trifoliate cultivars: Preliminary evidence for HLB (huanglongbing) resistance -
Stover, E., Shatters, R., McCollum, G., Hall, D., and Duan, Y-P. 2011. Evaluation of Liberibacter titer in field-infected trifoliate cultivars: Preliminary evidence for HLB (hunglongbing)resistance. Proceedings of Florida State Horticultural Society. 123:115-117.
Effect of HLB on flavor of orange juice and perception of limonin and nomilin -
Bud emergence and shoot growth from mature citrus nodal segments -
Hert, M.M., Evens, T.J., McCollum, T.G., Niedz, R.P. 2011. Bud emergence and shoot growth from mature citrus nodal segments. Plant Cell Tissue And Organ Culture. 106(1):81-91.
Consideration for alternative outlet for new citrus hybrids -
Notice to fruit growers and nurserymen relative to the naming and release of the US-942 citrus roostock -
Physiological effects induced by Squash vein yellowing virus, causal agent of viral watermelon vine decline in Florida -
Adkins, S.T., Webster, C.G., Mccollum, T.G., Albano, J.P., Turechek, W., Roberts, P., Webb, S.E., Baker, C.A., Kousik, C.S. 2010. Physiological effects induced by Squash vein yellowing virus, causal agent of viral watermelon vine decline in Florida. Cucurbitaceae Proceedings. 194-195.
Breeding citrus for HLB resistance at the USDA/ARS U.S. Horticultural Research Laboratory, Ft. Pierce, Florida -
Stover, E., Bowman, K., McCollum, T., Niedz, R., Shatters, R.G. Jr., Hall, D. 2010. Breeding citrus for HLB resistance at the USDA/ARS U.S. Horticultural Research Laboratory, Ft. Pierce, Florida. In: Proceedings of the 2nd International North American Plant Protection Organization (NAPPO) Conference on HLB, July 20, 2010, Merida, Mexico. Available: http://www.nappo.org/en/?sv=&category=Panel%20Docuents&title=Symposiums%20and%20Presentations
Temperature conditioning alters transcript abundance of genes related to chilling stress in 'Marsh' grapefruit flavedo -
Maul, D.P., Mccollum, T.G., Guy, C.L., Porat, R. 2011. Temperature conditioning alters transcript abundance of genes related to chilling stress in 'Marsh' grapefruit flavedo. Postharvest Biology and Technology. 60:177-185.
Effect of Huanglongbing (HLB) disease on orange fruit flavor -
HLB effects on the flavor of orange juice -
Candidatus Liberibacter asiaticus (CLas)titer in field HLB-exposed commercial citrus cultivars -
Stover, E., McCollum, G., Shatters, R.G., Hall, D.G., Duan, Y. 2011. Candidatus Liberibacter asiaticus (CLas)titer in field HLB-exposed commercial citrus cultivars. [abstract]. 2nd International Research on Huanglongbing. 11.10, p. 277.
Candidatus Liberibacter asiaticus (CLas)Titer in Poncirus trifoliata and P. trifoliata Hybrids: Inferences on Components of HLB Tolerance -
Developing Transgenic Citrus for Resistance to Huanglongbing and Citrus Canker -
Register of new fruit and nut cultivars list 45 -
Bowman, K.D., McCollum, T.G., Stover, E.W., Kahn, T.L., Roose, M.L., Krueger, R.R., Wright, G.C. 2010. Citrus. In: J.R. Clarke and C.E. Finn, eds. Register of new fruit and nut cultivars list 45. HortScience. 45:716-756.
Maturity and Postharvest Performance of US Early Pride Seedless Mandarins -
Mccollum, T.G. 2010. Maturity and Postharvest Performance of US Early Pride Seedless Mandarins. Florida Grower. 103(5):22-23.
HLB/ACP Resistance or Tolerance in Non-transgenic Citrus Scion Varieties: Potential Commercial Significance -
Insights regarding sensory evaluation of bitterness development in citrus juice -
Update on the watermelon vine decline virus and other whitefly-transmitted cucurbit viruses in Florida, and their effects on watermelon -
Adkins, S.T., Webster, C.G., Mccollum, T.G., Albano, J.P., Kousik, C.S., Roberts, P.D., Webb, S.E., Baker, C.A., Turechek, W. 2010. Update on the watermelon vine decline virus and other whitefly-transmitted cucurbit viruses in Florida, and their effects on watermelon. HortScience. 45(4):510
Development of a qPCR technique to screen for resistance to Asiatic citrus canker -
Mccollum, G., Stange, R., Albrecht, U., Bowman, K., Niedz, R., Stover, E. 2011. Development of a qPCR technique to screen for resistance to Asiatic citrus canker. Acta Horticulturae. 892:173-182.
Effect of Huanglongbing (HLB) disease on orange juice flavor -
Effect of Liberibacter infection (Huanglongbing or "greening" disease) of citrus on orange juice flavor quality by sensory evaluation -
Plotto, A., Baldwin, E., Mccollum, G., Manthey, J., Narciso, J., Irey, M. 2010. Effect of Liberibacter infection (Huanglongbing or "greening" disease) of citrus on orange juice flavor quality by sensory evaluation. Journal of Food Science. 75(4):S220-S230.
Effect of Liberibacter infection (Huanglongbing disease) of citrus on orange fruit physiology and fruit/fruit juice quality: chemical and physical analyses -
Baldwin, E., Plotto, A., Manthey, J., Mccollum, G., Bai, J., Irey, M., Cameron, R., Luzio, G. 2010. Effect of Liberibacter infection (Huanglongbing disease) of citrus on orange fruit physiology and fruit/fruit juice quality: chemical and physical analyses. Journal of Agricultural and Food Chemistry. 58:1247-1262.
Transcriptome Analysis of Early Fruit Development in Three Seedy Citrus Genotypes and Their Seedless Mutants -
Use of electronic tongue and nose sensors to differentiate between juice from greening (Huanglongbing) and healthy fruit -
Plotto, A., Bredzinski, X., Baldwin, E., Mccollum, G., Irey, M. 2009. Use of electronic tongue and nose sensors to differentiate between juice from greening (Huanglongbing) and healthy fruit. Subtropical Technology Conference Proceedings. 60:37-39.
Effect of seasonal variation on quality of ‘Valencia’ orange -
Bai, J., Baldwin, E., Plotto, A., Manthey, J., Mccollum, T., Irey, M., Luzio, G. 2009. Effect of seasonal variation on quality of ‘Valencia’ orange. Subtropical Technology Conference Proceedings. 60:18-19.
Flavor analysis of Hamlin and Valencia juice from greening (Huanglongbing) trees in 2009 -
Dea, S., Plotto, A., Valim, F., Rouseff, R., Baldwin, E., Mccollum, T., Irey, M. 2009. Flavor analysis of 'Hamlin' and 'Valencia' juice from greening (Huanglongbing) trees in 2009. Subtropical Technology Conference Proceedings. 60:33-36.
Influence of harvest time on quality of ‘Valencia’ oranges and juice -
Bai, J., Baldwin, E.A., Plotto, A., Manthey, J.A., Mccollum, T.G., Irey, M., Luzio, G.A. 2009. Influence of harvest time on quality of ‘Valencia’ oranges and juice. Proceedings of Florida State Horticultural Society. 122: 308-315.
US SEEDLESS PINEAPPLE ORANGE -
US EARLY PRIDE -
Influence of harvest time on flavor in ‘Valencia’ orange -
Baldwin, E.A., Plotto, A., Manthey, J.A., Bai, J., Mccollum, T.G., Irey, M. 2009. Influence of harvest time on flavor in ‘Valencia’ orange. Florida State Horticultural Society Meeting. Paper No. HP3.
The epidemiological significance of post-packinghouse survival of Xanthomonas citri ssp. citri for dissemination of Asiatic citrus canker via infected fruit -
Gottwald, T.R., Graham, J., Bock, C., Bonn, G., Civerolo, E.L., Irey, M., Leite, R., Lopez, M., Mccollum, T.G., Parker, P., Ramallo, J., Riley, T., Schubert, T., Stein, B., Taylor, E.L. 2009. The epidemiological significance of post-packinghouse survival of Xanthomonas citri ssp. citri for dissemination of Asiatic citrus canker via infected fruit. Crop Protection. 29:508-524.
Investigations of the effect of guava as a possible tool in the control/management of Huanglongbing -
Gottwald, T.R., Hall, D.G., Beattie, G., Bar-Joseph, M., Lapointe, S.L., Stover, E.W., Parker, P., Mccollum, T.G., Hilf, M.E. 2010. Investigations of the effect of guava as a possible tool in the control/management of Huanglongbing. International Organization of Citrus Virologists Proceedings.
An update on the effect of HLB on orange juice flavor: Sensory evaluation -
Plotto, A., Mccollum, T.G., Baldwin, E.A., Manthey, J.A., Irey, M. 2008. An update on the effect of HLB on orange juice flavor: Sensory evaluation. International Research Conference on Huanglongbing Poceedings. 1:241.
An update on the effect of citrus HLB on orange juice flavor – chemical components -
Baldwin, E.A., Manthey, J.A., Mccollum, T.G., Plotto, A., Irey, M. 2008. An update on the effect of citrus HLB on orange juice flavor – chemical components. International Research Conference on Huanglongbing Poceedings. 1:234-235.
Effect of early detection Huanglongbing on juice flavor and chemistry -
Plotto, A., Baldwin, E.A., Mccollum, T.G., Narciso, J.A., Irey, M. 2008. Effect of early detection Huanglongbing on juice flavor and chemistry. Proceedings of Florida State Horticultural Society. 121:265-269.
An update on the effect of citrus greening on flavor components of orange juice over several seasons -
Baldwin, E.A., Plotto, A., Mccollum, T.G., Manthey, J.A., Irey, M., Bai, J. 2008. An update on the effect of citrus greening on flavor components of orange juice over several seasons. Subtropical Technology Conference Proceedings. 59:40-42.
An update on the effect of citrus greening on flavor and taste of orange juice -
Plotto, A., Baldwin, E.A., Mccollum, T.G., Irey, M. 2008. An update on the effect of citrus greening on flavor and taste of orange juice. Subtropical Technology Conference Proceedings. 59:38-39.
Thermally tolerant pectin methylesterase, juice cloud loss and greening -
Cameron, R.G., Savary, B.J., Vasu, P., Mccollum, T.G. 2008. Thermally tolerant pectin methylesterase, juice cloud loss and greening. Subtropical Technology Conference Proceedings.59:29.
Alternative fumigants and grafting for tomato and double-cropped muskmelon production in Florida -
Burelle, N.K., Rosskopf, E.N., Bausher, M.G., Mccollum, T.G., Kubota, C. 2008. Alternative fumigants and grafting for tomato and double-cropped muskmelon production in Florida. Proceedings of International Research Conference on Methyl Bromide Alternatives. 63:1-2.
Citrus scion breeding at the USDA/ARS U.S. Horticultural Research Laboratory -
Stover, E.W., McCollum, T.G., Niedz, R.P., Bowman, K.D. 2008. Citrus scion breeding at the USDA/ARS U.S. Horticultural Research Laboratory. In: Proceedings of the International Society of Citriculture. 1:50-54.
Comparison of three new citrus rootstocks from USDA: US-802, US-812, and US-897 -
Bowman, K.D., Albrecht, U., Mccollum, T.G. 2008. Comparison of three new citrus rootstocks from USDA: US-802, US-812, and US-897. Proceedings of the International Society of Citriculture from the 11th Citrus Congress in Wuhan, China. China Agriculture Press. P. 198-199.
Effect of early detection greening on juice flavor and chemistry -
Plotto, A., Baldwin, E., Mccollum, G., Irey, M. 2008. Effect of early detection of greening on juice flavor and chemistry. Florida State Horticultural Society Meeting. Paper No. HP2.
Transcriptome profiling of grapefruit following exposure to low temperature and conditioning treatments uncovers principal molecular components involved in chilling tolerance and susceptibility. -
Maul, D.P., Mccollum, T.G., Popp, M., Guy, C.L., Porat, R. 2008. Transcriptome profiling of grapefruit following exposure to low temperature and conditioning treatments uncovers principal molecular components involved in chilling tolerance and susceptibility.. Plant Cell and Environment.31(6):752-768.
The role of citrus volatiles in germination and growth of Penicillium digitatum and Penicillium italicum -
Droby, S., Eick, A., Macarisin, D., Cohen, L., Rafael, G., Stange Jr, R.R., Mccollum, T.G., Dudai, N., Nasser, A., Wisniewski, M.E., Shapira, R. 2008. The role of citrus volatiles in germination and growth of Penicillium digitatum and Penicillium italicum. Postharvest Biology and Technology. 49:386-396.
Update on the USDA, ARS Citrus Scion Improvement Project -
Mccollum, T.G. 2008. Update on the USDA, ARS Citrus Scion Improvement Project. Proceedings of Florida State Horticultural Society. 120:285-287.
Squash vein yellowing virus and its effects on watermelon -
Adkins, S.T., Mccollum, T.G., Albano, J.P., Kousik, C.S., Roberts, P., Baker, C., Webb, S. 2007. Squash vein yellowing virus and its effects on watermelon. American Phytopathological Society Annual Meeting.
TEMPERATURE CONDITIONING ALTERS TRANSCRIPT ABUNDANCE OF GENES RELATED TO CHILLING STRESS IN GRAPEFRUIT. -
Mccollum, T.G., Maul, P., Guy, C., Porat, R. 2007. Temperature conditioning alters transcript abundance of genes related to chilling stress in grapefruit. [abstract] HortScience. 42(4):981-982.
EST-SSR genetic maps for Citrus sinensis and Poncirus trifoliata -
Chen, C., Bowman, K.D., Choi, Y.A., Dang, P.M., Rao, M., Huang, S., Soneji, J.R., Mccollum, T.G., Gmitter, Jr, F.G. 2007. EST-SSR genetic maps for Citrus sinensis and Poncirus trifoliata. Tree Genetics and Genomes. 4:1-10. 2008.
Ethylene modulates transcription of the phosphoenolpyruvate carboxykinase gene in grapefuit flavedo. -
Maul, D.P., Mckendree, W., Bausher, M.G., Mccollum, T.G. 2007. Ethylene modulates transcription of the phosphoenolpyruvate carboxykinase gene in grapefuit flavedo. Journal of Horticultural Science and Biotechnology. 82:61-68.
1-MCP INHIBITS DEGREENING, BUT STIMULATES RESPIRATION AND ETHYLENE BIOSYNTHESIS IN GRAPEFRUIT. -
McCollum, T.G., Maul, D.P. 2007. 1-Methylcyclopropene inhibits degreening but stimulates respiration and ethylene biosynthesis in grapefruit. HortScience. 42(1):120-124.
Promising New Citrus Scion Selections from the USDA -
Mccollum, T.G. 2006. Promising New Citrus Scion Selections from the USDA. Review Article.
Postharvest heat and conditioning treatments activate different molecular responses and prevent chilling injuries in grapefruit. -
Sapitnitskaya, M., Maul, P., McCollum,T.G., Guy,C.L, Weiss, B., Samach, A., Porat, R. 2006. Postharvest heat and conditioning treatments activate different molecular responses and reduce chilling injuries in grapefruit. Journal of Experimental Botany. 57(12):2943-2953.
SCREENING CITRUS GERMPLASM FOR RESISTANCE TO XANTHORMONOS AXONOPODIS PV.CTRI -
Mccollum, T.G., Bowman, K.D., Gottwald, T.R. 2006. Screening citrus germplasm for resistance to xanthormonos axonopodis pv.ctri.[abstract]HortScience. 41:1048-1049.
SCREENING CITRUS GERMPLASM FOR RESISTANCE TO XANTHOMONAS ANONOPODIS PV. CITRI -
Mccollum, T.G., Bowman, K.D., Gottwald, T.R. 2006. Screening citrus germplasm for resistance to xanthomonas anonopodis pv. citri. Hortscience Proceedings.41:1048-1049
SCREENING CITRUS GERMPLASM FOR RESISTANCE TO XANTHOMONAS AXONOPODIS PV. CITRI -
Mccollum, T.G., Bowman, K.D., Gottwald, T.R. 2006. Screening citrus germplasm for resistance to xanthomonas axonopodis pv. citri. Second International Research Workshop on Citrus Canker and Huanglongbing, November 2005. P18, p.3.
IDENTIFICATION OF A GENE INDUCED DURING EARLY SOMATIC EMBRYOGENESIS IN VALENCIA SWEET ORANGE (CITRUS SINENSIS L. OSBECK) THAT ENCODES A PUTATIVE HISTIDINE-CONTAINING PHOSPHOTRANSMITTER PROTEIN -
Maul, D.P., Bausher, M.G., Mccollum, T.G., Mozoruk, J.J., Niedz, R.P. 2005. Identification of a gene induced during early somatic embryogenesis in valencia sweet orange (citrus sinensis l. osbeck) that encodes a putative histidine-containing phosphotransmitter protein. Plant Science.
FRUIT AND JUICE QUALITY OF SEEDLESS PINEAPPLE ORANGES ON FOUR ROOTSTOCKS. -
Mccollum, T.G., Bowman, K.D. 2005. Fruit and juice quality of seedless pineaplle oranges on four rootstocks. 118:1-3 . Proceedings Florida State Horticultural Science.
EFFECTS OF PRE- OR POSTHARVEST GIBBERELLIC ACID APPLICATION ON STORAGE QUALITY OF FLORIDA 'RUBY' RED GRAPEFRUIT AND 'FALLGLO' TANGERINES -
POSTHARVEST QUALITY OF TOMATOES PRODUCED IN ORGANIC AND CONVENTIONAL PRODUCTION SYSTEMS -
Mccollum, T.G., Chellemi, D.O., Rosskopf, E.N., Church, G.T., Plotto, A. 2005. Postharvest quality of tomatoes produced in organic and conventional production systems. American Society of Horticulture Science Meeting, July 2005. Hort Science, Vol.40(4),p.959.
IMPORTANCE OF POSTHARVEST EVALUATION IN A FRESH FRUIT BREEDING PROGRAM: USDA 77-19 A CASE IN POINT -
Mccollum,T.G.,Chaparro,J.X.2004.Importance of postharvest evaluation in a fresh fruit breeding program: usda 77-19 a case in point. Proceedings of Florida State Horticultural Society.
RESPONSE OF FLORIDA GRAPEFRUIT TO SHORT-DURATION HEAT TREATMENTS USING VAPOR HEAT OR HOT WATER DIPS -
CHILLING INJURY AND POSTHARVEST DECAY IN CITRUS -
John-Karuppiah, K., Ritenour, M.A., Burton, M.S., Brecht, J.K., Mccollum, T.G. 2004. Chilling injury and postharvest decay in citrus. Proceedings of Florida State Horticultural Society.
EFFECTS OF ETHYLENE AND 1-MCP ON GENE EXPRESSION IN GRAPEFRUIT FLAVEDO -
Mccollum,T.G.,Maul,D.P.2004.Effects of ethylene and 1-mcp on gene expression in grapefruit flavedo.International Society of Citriculture Proceedings.
CURRENT TRENDS IN CITRUS POSTHARVEST DECAY CONTROL -
Mccollum,T.G.2004.Current trends in citrus postharvest decay control. International Society of Citriculture Proceedings.
THE ROLE OF CITRUS PEEL COMPOUNDS IN HOST RECOGNITION BY PENICILLIUM DIGITATUM AND P. ITALICUM -
Stange,Jr.,R.R.,Mccollum,T.G.,Midland,S.L.,Sims,J.J.2004.The role of citrus peel compounds in host recognition by penicillium digitatum and p. italicum. International Society of Citriculture Proceedings.
RESPONSE OF FLORIDA GRAPEFRUIT TO SHORT-DURATION HEAT TREATMENTS USING VAPOR HEAT OR HOT WATER DIPS -
Ritenour, M.A., John, K., Pelosi, R.R., Burton, M.S., Mccollum, T.G., Brecht, J.K., Baldwin, E.A. 2003. Response of florida grapefruit to short-duration heat treatments using vapor heat or hot water dips. Proceedings Of Florida State Horticultural Society. 116:405-409.
PUTATIVE PROTEASE INHIBITOR GENE DISCOVERY AND TRANSCRIPT PROFILING DURING FRUIT DEVELOPMENT AND LEAF DAMAGE IN GRAPEFRUIT (CITRUS PARADISI MAEF.) -
Shatters, R.G., Bausher, M.G., Hunter, W.B., Chaparro, J.X., Dang, P.M., Niedz, R.P., Mayer, R.T., Mccollum, T.G., Sinisterra, X. 2004. Putataive protease inhibitor gene discovery and transcript profiling during fruit development and leaf damage in grapefruit (citrus paradisi macf). Gene 326:77-86
CHILLING INJURY OF GRAPEFRUIT AND ITS CONTROL -
Mark A. Ritenour, Assistant Professor, IRREC-Ft Pierce, CREC-Lake Alfred, Cooperative Extension Service, Institute of Food and Agricultural Sciencies, University of Florida, Gainesville, FL 32611; Huating Dou, Florida Department of Citrus, Lake Alfred FL; Greg T. McCollum, USDA, Fort Pierce, FL
RESPONSE OF FLORIDA GRAPEFRUIT TO SHORT DURATION HEAT TREATMENTS USING VAPOR HEAT OR HOT WATER DIPS -
The role of genomics in citrus improvement -
Niedz, R.P., Shatters, R.G., Bowman, K.D., Mccollum, T.G., Bausher, M.G., Hunter, W.B., Chaparro, J.X. 2003. The role of genomics in citrus improvement. In: Proceedings of the Florida State Horticultural Society. 116:278-282.
CHARACTERIZATION OF THE WOUND INDUCED MATERIAL IN CITRUS FRUIT PEEL BY CARBON-13 CP-MAS SOLID STATE NMR SPECTROSCOPY -
DIFFERENTIAL EFFECTS OF CITRUS PEEL EXTRACTS ON GROWTH OF PENICILLIUM DIGITATIUM, P. ITALICUM AND P. EXPANSUM -
Richard R. Stange,Sharon L. Midland,James J. Sims,T. Greg McCollum
Effects of rootstock on fruit quality and postharvest behavior of 'Marsh" grapefruit -
Mccollum, T.G., Bowman, K.D., Castle, W.S. 2003. Effects of rootstock on fruit quality and postharvest behavior of 'Marsh" grapefruit. Proceedings of Florida State Horticultural Society. 115:10-13.
A HOME FOR PHYTOALEXINS? - PURIFICATION AND FURTHER CHARACTERIZATION OF THEINDUCED, SO CALLED, "LIGNIN-LIKE" MATERIAL FROM PECTINASE ELICITED SQUASH FRUIT -
KAOLIN PARTICLE FILM DETERS ROOT WEEVILS AND ENHANCES YOUNG TREE GROWTH -
Lapointe, S.L., Mckenzie, C.L., Mccollum, T.G. 2002. Kaolin particle film deters root weevils and enhances young tree growth. Diaprepes Task Force Abstracts.
MOLECULAR BIOLOGY OF HOST/PATHOGEN INTERACTIONS IN HARVESTED HORTICULTURE CROPS -
COMPONENTS OF CITRUS PEEL SELECTIVELY STIMULATE GROWTH OF PATHOGENIC PENICILLUM SPECIES -
DIFFERENTIAL EXPRESSION OF TWO CINNAMATE 4-HYDROXYLASE GENES IN 'VALENCIA' ORANGE (CITRUS SINENSIS) OSBECK -
IS IT LIGNIN WE FIND ON THE PATH TO RESISTANCE? -
TEMPERATURE OF WATER HEAT TREATMENTS INFLUENCE TOMATO FRUIT QUALITY FOLLOWING LOW TEMPERATURE STORAGE -
BIOCHEMICAL AND MOLECULAR CHARACTERIZATION OF A B-1,3-ENDOGLUCANASE FROM 'VALENCIA' ORANGE CALLUS -
PURIFICATION AND CHARACTERIZATION OF AN ENDO-POLYGALACTURONASE FROM THE GUTOF SUGARCANE ROOTSTOCK BORER WEEVIL (DIAPREPES ABBREVIATUS) LARVAE -
INFLUENCE OF PREHARVEST APPLICATIONS OF GIBBERELLIC ACID ON GRAPEFRUIT PEEL AND LEAF DROP -
CHARACTERIZATION OF CHITINASES AND B-1,3-GLUCANASES IN GRAPEFRUIT FLAVEDO DURING FRUIT DEVELOPMENT -
A DESCRIPTION OF SOME BASIC CHITINASES ISOLATED FROM SWEET ORANGE CALLUS TISSUE -
PRESTORAGE HEAT TREATMENTS INFLUENCE FREE STEROLS AND FLAVOR VOLATILES OF TOMATOES STORED AT CHILLING TEMPERATURE -
EXPLOITATION OF PLANT PATHOGENESIS-RELATED PROTEINS FOR ENHANCED PEST RESISTANCE IN CITRUS -
Last Modified: 8/26/2016
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