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Lookup NU author(s): Dr Roger Pearce
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Agropyron desertorum and Lophopyrum elongatum were grown in a control environment or acclimated in high-salt (daily exposure to 75 or 150 mM NaCl for 6 d), cold (6/2 °C for 14 d) or drought environments (watering withheld for 6 d). Lophopyrum elongatum was constitutively tolerant to salt and also acclimated more to salt than did A. desertorum whereas A. desertorum acclimated more to cold and drought. Dehydrin and non-specific lipid transfer protein (nsLTP) mRNA sequences and polypeptides increased more, during acclimation to cold and drought, in A. desertorum than in L. elongatum crowns. Expression of immunologically identified dehydrin polypeptides was much higher in drought-acclimated A. desertorum than in any other species/treatment combination. The most strongly expressed were 42 and 20 kDa. No change in dehydrin or nsLTP polypeprides were detected in the crowns during acclimation to salt. Overall, there was stronger acclimation to dehydrative stresses, at the molecular level, in A. desertorum than in L. elongatum crowns. Differences in dehydrin and nsLTP mRNA and polypeptide expression during acclimation to different stresses indicated that plants sense the differences between different primary potential causes of cellular dehydration.
Author(s): Pearce RS; Tabaei-Aghdaei SR; Harrison P
Publication type: Article
Publication status: Published
Journal: Plant, Cell and Environment
ISSN (print): 0140-7791
ISSN (electronic): 1365-3040
Publisher: Wiley-Blackwell Publishing Ltd.
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