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Please use this identifier to cite or link to this item: http://dspace.utalca.cl/handle/1950/1533

Title: Differential accumulation of dehydrin-like proteins by abiotic stresses in Deschampsia antarctica Desv.
Authors: Olave-Concha, N.
Bravo, L.A.
Ruiz-Lara, S.
Corcuera, L.J.
Keywords: Water-Deficit
Signal-Transduction
Low-Temperature
Osmotic-Stress
Abscisic-Acid
Reversible Photoinhibition
Colobanthus-Quitensis
Freezing Tolerance
Cold-Acclimation
Vascular Plants
Issue Date: Jun-2005
Publisher: Springer Berlin / Heidelberg
Citation: Polar Biology 28 (7): 506-513
Abstract: Dehydrins are proteins that accumulate during environmental stresses leading to cell dehydration. Deschampsia antarctica is one of the two vascular plants that have colonized the Maritime Antarctic. This plant is usually exposed to cold, salt and desiccating winds in the field. We proposed that among the factors that allow D. antarctica to survive the harsh environmental conditions is the presence of dehydrins. We studied the accumulation of dehydrins by abscisic acid (ABA), dehydration, NaCl and low osmotic potential. Western blots using an anti-dehydrin antibody revealed a complex pattern of dehydrin-like proteins (DLPs) accumulation in the different treatments. DLPs with apparent molecular weight of 58, 57, 55, 53, 48, 42, 32, 30, 28 and 25 kDa were detected in the different treatments. DLPs accumulation was associated with a decrease in the relative water content (RWC) of the plants. These results suggest that DLPs accumulation could contribute to explain how D. antarctica can survive under adverse Antarctic conditions.
Description: Ruiz-Lara, S. Instituto de Biología Vegetal y Biotecnología, Universidad de Talca, Casilla 747, Talca, Chile
URI: http://dspace.utalca.cl/handle/1950/1533
ISSN: 0722-4060
Appears in Collections:Artículos en publicaciones ISI - Universidad de Talca

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