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ARS Home » Research » Publications at this Location » Publication #91873
Title: EFFECT OF DROUGHT AND COLD STRESS ON BLUEBERRY DEDYDRIN EXPRESSION

Author
item PANTA, GANESH - CONTRACT EMPLOYEE
item Rowland, Lisa

Submitted to: Blueberry Research Extension North American Workers Conference Proceedings
Publication Type: Proceedings
Publication Acceptance Date: 5/27/1998
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: Previously three dehydrins of 65, 60, and 14 kD were identified as the predominant proteins present in cold acclimated blueberry floral buds. Levels were shown to increase with cold acclimation and decrease with deacclimation and resumption of growth. Dehydrins are a group of heat stable, glycine-rich plant proteins that are induced by environmental stimuli that have a dehydration component including drought, low temperature, salinity, and seed maturation. In the present study, expression of dehydrins was examined in several blueberry cultivars in response to drought and low temperature treatment. During 32 days of drought stress, relative shoot water content dropped to 51 to 90% depending upon cultivars. For cold stress experiments, cultivars with different chilling requirements and levels of cold hardiness were kept at four C for five weeks. Dehydrin proteins level in roots, stems, and leaves were monitored in response to drought and cold treatment proteins level.