A role for expansins in dehydration and rehydration of the resurrection plant Craterostigma plantagineum
- 21 January 2004
- journal article
- Published by Wiley in FEBS Letters
- Vol. 559 (1-3) , 61-65
- https://doi.org/10.1016/s0014-5793(04)00023-7
Abstract
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 alpha-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.Keywords
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