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Polar Biology

, Volume 28, Issue 7, pp 506–513 | Cite as

Differential accumulation of dehydrin-like proteins by abiotic stresses in Deschampsia antarctica Desv.

  • Nélida Olave-Concha
  • León A. Bravo
  • Simón Ruiz-Lara
  • Luis J. CorcueraEmail author
Original Paper

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.

Keywords

Salt Stress Osmotic Stress Relative Water Content Osmotic Potential Dehydration Stress 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

The financial support of FONDECYT 2000144 and fellowship from CONICYT are gratefully acknowledged. Instituto Antártico Chileno provided the logistics and the permit for collecting plants in an ASPA. We thank Dr. Timothy Close for providing the anti-dehydrin antibody.

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Copyright information

© Springer-Verlag 2005

Authors and Affiliations

  • Nélida Olave-Concha
    • 1
  • León A. Bravo
    • 1
  • Simón Ruiz-Lara
    • 2
  • Luis J. Corcuera
    • 1
    Email author
  1. 1.Departamento de Botánica, Facultad de Ciencias Naturales y OceanográficasUniversidad de ConcepciónConcepciónChile
  2. 2.Instituto de Biología Vegetal y BiotecnologíaUniversidad de TalcaTalcaChile

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