Specific roles of AtEXPA1 in plant growth and stress adaptation

Specific roles of AtEXPA1 in plant growth and stress adaptation Expansins are a group of proteins that appear to be involved in the disruption of the noncovalent bonds within the cell wall. The distinctly expressed expansin genes can independently regulate cell expansion in place and time, and their diverse expression patterns suggest their distinct effects on plant growth. In this paper, we analyzed the effects of excessive expansin AtEXPA1 on plant growth and plant adaptation to NaCl and ABA stresses by overexpressing its gene in Arabidopsis plants. The AtEXPA1 overexpressing plants exhibited stunted shoot growth, mainly during the early phase of vegetative growth, and the growth of transgenic seedlings was also impaired. Comparing with their growth under normal growth condition, the AtEXPA1 overexpressing plants showed alleviated impairment under salt and ABA stress conditions. These results suggest that, although excessive AtEXPA1 could disturb cell wall organization and lead to growth reduction, it inversely helped enhancing cell wall organization under stress conditions and thus helped plant better to adapt to adverse environment. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Plant Physiology Springer Journals

Specific roles of AtEXPA1 in plant growth and stress adaptation

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Publisher
Springer Journals
Copyright
Copyright © 2010 by Pleiades Publishing, Ltd.
Subject
Life Sciences; Plant Sciences ; Plant Physiology
ISSN
1021-4437
eISSN
1608-3407
D.O.I.
10.1134/S1021443710020111
Publisher site
See Article on Publisher Site

Abstract

Expansins are a group of proteins that appear to be involved in the disruption of the noncovalent bonds within the cell wall. The distinctly expressed expansin genes can independently regulate cell expansion in place and time, and their diverse expression patterns suggest their distinct effects on plant growth. In this paper, we analyzed the effects of excessive expansin AtEXPA1 on plant growth and plant adaptation to NaCl and ABA stresses by overexpressing its gene in Arabidopsis plants. The AtEXPA1 overexpressing plants exhibited stunted shoot growth, mainly during the early phase of vegetative growth, and the growth of transgenic seedlings was also impaired. Comparing with their growth under normal growth condition, the AtEXPA1 overexpressing plants showed alleviated impairment under salt and ABA stress conditions. These results suggest that, although excessive AtEXPA1 could disturb cell wall organization and lead to growth reduction, it inversely helped enhancing cell wall organization under stress conditions and thus helped plant better to adapt to adverse environment.

Journal

Russian Journal of Plant PhysiologySpringer Journals

Published: Mar 25, 2010

References

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