A role for expansins in dehydration and rehydration of the resurrection plant Craterostigma plantagineum

FEBS Letters

Jones, Louise¹  McQueen-Mason, Simon¹ 

[1] CNAP, Department of Biology, University of York, PO Box 373, York YO10 5YW, UK

关键词: Plant cell wall;    Expansin;    Drought stress;    Resurrection plant;   

DOI  :  10.1016/S0014-5793(04)00023-7

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

Craterostigma plantagineum is one of the few higher plants capable of surviving desiccation throughout its vegetative tissues. Water loss results in cell shrinkage and a commensurate folding of the cell wall indicating an unusual degree of wall flexibility. We show that wall extensibility undergoes a marked increase during dehydration and rehydration. Similar increases were observed in the activity of expansins in cell walls during these processes suggesting a role for these proteins in increasing wall flexibility. Three α-expansin cDNAs were cloned from dehydrating leaves and transcript levels for one correlated closely with the observed changes in expansin activity during the dehydration and rehydration of leaves.

【 授权许可】

Unknown