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Titolo:
Effect of cold and drought stress on blueberry dehydrin accumulation
Autore:
Panta, GR; Rieger, MW; Rowland, LJ;
Indirizzi:
USDA ARS, Beltsville Agr Res Ctr, Fruit Lab, Beltsville, MD 20705 USA USDAARS Beltsville MD USA 20705 Ctr, Fruit Lab, Beltsville, MD 20705 USA Univ Tennessee, Coll Med, Dept Pharmacol, Memphis, TN 38163 USA Univ Tennessee Memphis TN USA 38163 Dept Pharmacol, Memphis, TN 38163 USA Univ Georgia, Dept Hort, Athens, GA 30602 USA Univ Georgia Athens GA USA 30602 Georgia, Dept Hort, Athens, GA 30602 USA
Titolo Testata:
JOURNAL OF HORTICULTURAL SCIENCE & BIOTECHNOLOGY
fascicolo: 5, volume: 76, anno: 2001,
pagine: 549 - 556
SICI:
1462-0316(200109)76:5<549:EOCADS>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
MOLECULAR RESPONSES; FREEZING TOLERANCE; LOW-TEMPERATURE; SECTION CYANOCOCCUS; ABSCISIC-ACID; FLORAL BUDS; EXPRESSION; PROTEINS; GENES; DEHYDRATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
37
Recensione:
Indirizzi per estratti:
Indirizzo: Rowland, LJ USDA ARS, Beltsville Agr Res Ctr, Fruit Lab, Beltsville, MD 20705 USA USDA ARS Beltsville MD USA 20705 ab, Beltsville, MD 20705 USA
Citazione:
G.R. Panta et al., "Effect of cold and drought stress on blueberry dehydrin accumulation", J HORT SCI, 76(5), 2001, pp. 549-556

Abstract

Dehydrins are a group of plant proteins which respond to any type of stress that causes dehydration at the cellular level, such as cold and drought stress. Previously, three dehydrins of 65, 60, and 14 kDa were identified asthe predominant proteins present in cold acclimated blueberry (Vaccinium corymbosum Linn.) floral buds. Levels were shown to increase with cold acclimation and decrease with deacclimation and resumption of growth. In the present study, to determine if dehydrins are induced in other organs in response to low temperature treatment (4 degreesC) and in response to drought, accumulation of dehydrins was examined in leaves, stems, and roots of two cultivars and one wild selection (a V. corymbosum cultivar, a V. ashei Reade cultivar, and a V. darrowi Camp selection) of blueberry by SDS-polyacrylamide gel electrophoresis (SDS-PAGE) followed by immunoblotting. Cold treatmentinvolved placing plants in a cold room maintained at 4 degreesC for five weeks; drought stress was imposed by withholding water from potted, greenhouse-grown plants for 34 d. Relative water content (RWC) of shoots was determined periodically throughout the drought treatment. Dehydrins accumulated with both cold and drought stress but their molecular masses varied depending upon blueberry species. Dehydrins accumulated to higher levels in stems and roots than in leaves with cold stress and to higher levels in stems thanin either roots or leaves with drought stress. Furthermore, cold treatmentcombined with dark treatment induced higher levels of dehydrins than cold treatment combined with a 10 h light/14 h dark photoperiod, suggesting thatdehydrins may be responsive to changes in photoperiod as well. In the cold-stress experiment, the level of dehydrin accumulation was correlated with expected level of plant cold hardiness in the three genotypes. In the drought stress experiment, dehydrins accumulated prior to significant changes inRWC, and dehydrin levels did not appear to be closely correlated with RWC either among or within genotypes.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/09/20 alle ore 00:44:45