OsWRKY30 is activated by MAP kinases to confer drought tolerance in rice

OsWRKY30 is activated by MAP kinases to confer drought tolerance in rice Both the WRKY transcription factor (TF) and MAP kinases have been shown to regulate gene expression in response to biotic and abiotic stresses in plants. Several reports have shown that WRKY TFs may function downstream of MAPK cascades. Here, we have shown that OsWRKY30 interacted with OsMPK3, OsMPK4, OsMPK7, OsMPK14, OsMPK20-4, and OsMPK20-5, and could be phosphorylated by OsMPK3, OsMPK7, and OsMPK14. Overexpression of OsWRKY30 in rice dramatically increased drought tolerance. Overexpression of OsWRKY30AA, in which all SP (serine residue followed by proline residue) sites were replaced by AP (A, alanine), resulted in no improvement in drought tolerance. In addition, the function of transcriptional activation of OsWRKY30 was impaired after SP was replaced by AP. These results proved that the phosphorylation of OsWRKY30 by MAPKs was crucial in order for OsWRKY30 to perform its biological function. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Plant Molecular Biology Springer Journals

OsWRKY30 is activated by MAP kinases to confer drought tolerance in rice

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Publisher
Springer Netherlands
Copyright
Copyright © 2012 by Springer Science+Business Media B.V.
Subject
Life Sciences; Plant Pathology; Biochemistry, general; Plant Sciences
ISSN
0167-4412
eISSN
1573-5028
D.O.I.
10.1007/s11103-012-9941-y
Publisher site
See Article on Publisher Site

Abstract

Both the WRKY transcription factor (TF) and MAP kinases have been shown to regulate gene expression in response to biotic and abiotic stresses in plants. Several reports have shown that WRKY TFs may function downstream of MAPK cascades. Here, we have shown that OsWRKY30 interacted with OsMPK3, OsMPK4, OsMPK7, OsMPK14, OsMPK20-4, and OsMPK20-5, and could be phosphorylated by OsMPK3, OsMPK7, and OsMPK14. Overexpression of OsWRKY30 in rice dramatically increased drought tolerance. Overexpression of OsWRKY30AA, in which all SP (serine residue followed by proline residue) sites were replaced by AP (A, alanine), resulted in no improvement in drought tolerance. In addition, the function of transcriptional activation of OsWRKY30 was impaired after SP was replaced by AP. These results proved that the phosphorylation of OsWRKY30 by MAPKs was crucial in order for OsWRKY30 to perform its biological function.

Journal

Plant Molecular BiologySpringer Journals

Published: Aug 9, 2012

References

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