Plant And Animal Genetic Resources Preservation Research Unit Site Logo
ARS Home About Us Helptop nav spacerContact Us En Espanoltop nav spacer
Printable VersionPrintable Version     E-mail this pageE-mail this page
Agricultural Research Service United States Department of Agriculture
Search
  Advanced Search
 
Programs and Projects
Subjects of Investigation
National Animal Germplasm (NAGP)
Preservation and Quality Assessment of Plant Genetic Resources (PGRPP)
 

Research Project: PRESERVATION AND QUALITY ASSESSMENT OF PLANT GENETIC RESOURCES

Location: Plant And Animal Genetic Resources Preservation Research Unit

Title: Desiccation and freezing studies of dormant buds from selected horticultural woody plant species

Authors

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: April 16, 2009
Publication Date: April 20, 2009
Citation: Jenderek, M.M., J.D. Postman, E.W. Stover and D.D. Ellis. 2009. Desiccation and freezing studies of dormant buds from selected horticultural woody plant species. I International Symposium on Cryopreservation in Horticultural Species, April 5-8, 2009. Leuven, Belgium. pp. 91. Meeting abstract.

Interpretive Summary: Several reports have demonstrated the advantages of backing up field maintained collections in liquid nitrogen; however the application of cryopreservation protocols to a wide range of genetic diversity found in germplasm collections has only been reported in a few instances. Long-term preservation of dormant buds is less expensive than cryopreservation of shoot or meristem cultures; hence it presents an option for a back up of woody plant species. Dormant bud cryopreservation procedures can be species dependent but in general they require an ability of the buds to survive desiccation to <30% MC and slow-cooling (1oC/hour) to -35oC prior to liquid nitrogen. Therefore, we looked at survival after desiccation and slow cooling, to assess pre-liquid nitrogen survival of dormant buds from a number of species. Dormant branches were collected from field-grown trees, cut into 35 mm sections containing one dormant bud per section and desiccated to 25-30% MC with or without slow-cooling to -35oC. Bud sections were then rehydrated in moist peat moss and survival was evaluated by grafting. Data indicated that 65-100% of almond and apricot, >80% of sweet cherry, >21% of walnut and >12% of blueberry dormant buds survived desiccation and slow-cooling. In contrast, pomegranate dormant buds did not survive desiccation suggesting other preservation methods may be more applicable for this species. Dormant buds present a difficult experimental system due to many sources of variation which can confound results including the level of dormancy of the buds and the grafting step where success can depend on the personnel doing the grafting as well as the source and variety of the rootstock. Development of dependable cryopreservation protocols would increase the number of woody plant accessions being backed up at the National Center in a considerable shorter time than preserving the accessions via tissue culture material.

Technical Abstract: Several reports have demonstrated the advantages of backing up field maintained collections in liquid nitrogen; however the application of cryopreservation protocols to a wide range of genetic diversity found in germplasm collections has only been reported in a few instances. Long-term preservation of dormant buds is less expensive than cryopreservation of shoot or meristem cultures; hence it presents an option for a back up of woody plant species. Dormant bud cryopreservation procedures can be species dependent but in general they require an ability of the buds to survive desiccation to <30% MC and slow-cooling (1oC/hour) to -35oC prior to liquid nitrogen. Therefore, we looked at survival after desiccation and slow cooling, to assess pre-liquid nitrogen survival of dormant buds from a number of species. Dormant branches were collected from field-grown trees, cut into 35 mm sections containing one dormant bud per section and desiccated to 25-30% MC with or without slow-cooling to -35oC. Bud sections were then rehydrated in moist peat moss and survival was evaluated by grafting. Data indicated that 65-100% of almond and apricot, >80% of sweet cherry, >21% of walnut and >12% of blueberry dormant buds survived desiccation and slow-cooling. In contrast, pomegranate dormant buds did not survive desiccation suggesting other preservation methods may be more applicable for this species. Dormant buds present a difficult experimental system due to many sources of variation which can confound results including the level of dormancy of the buds and the grafting step where success can depend on the personnel doing the grafting as well as the source and variety of the rootstock. Development of dependable cryopreservation protocols would increase the number of woody plant accessions being backed up at the National Center in a considerable shorter time than preserving the accessions via tissue culture material.

   

 
Project Team
Dierig, David
Jenderek, Maria
 
Publications
   Publications
 
Related National Programs
  Plant Genetic Resources, Genomics and Genetic Improvement (301)
 
Related Projects
   MONITORING THE SEED HEALTH IN CONVENTIONAL LONG-TERM EX SITU STORAGE
   INTERNATIONAL RICE RESEARCH INSTITUTE RICE GERMPLASM STORAGE AND CONSERVATION
   SEEDS OF SUCCESS (SOS) NATIONAL COLLECTION INITIAL GERMINATION, RESEARCH, AND LONG-TERM STORAGE WITH CURATION
   CRYOSTORAGE OF PLANT VARIETY PROTECTION VOUCHER GERMPLASM OF SOLANUM TUBERSOSUM
   THE ROLE OF ROOT SYSTEM ARCHITECTURE IN DROUGHT TOLERANCE
 
 
Last Modified: 05/25/2013
ARS Home | USDA.gov | Site Map | Policies and Links 
FOIA | Accessibility Statement | Privacy Policy | Nondiscrimination Statement | Information Quality | USA.gov | White House