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A Putative PP2C-Encoding Gene Negatively Regulates ABA Signaling in Populus euphratica.

TitleA Putative PP2C-Encoding Gene Negatively Regulates ABA Signaling in Populus euphratica.
Publication TypeJournal Article
Year of Publication2015
AuthorsChen, J., Zhang D., Zhang C., Xia X., Yin W., & Tian Q.
JournalPloS one
Volume10
Issue10
Paginatione0139466
Date Published2015
ISSN1932-6203
Abstract

A PP2C homolog gene was cloned from the drought-treated cDNA library of Populus euphratica. Multiple sequence alignment analysis suggested that the gene is a potential ortholog of HAB1. The expression of this HAB1 ortholog (PeHAB1) was markedly induced by drought and moderately induced by ABA. To characterize its function in ABA signaling, we generated transgenic Arabidopsis thaliana plants overexpressing this gene. Transgenic lines exhibited reduced responses to exogenous ABA and reduced tolerance to drought compared to wide-type lines. Yeast two-hybrid analyses indicated that PeHAB1 could interact with the ABA receptor PYL4 in an ABA-independent manner. Taken together; these results indicated that PeHAB1 is a new negative regulator of ABA responses in poplar.

DOI10.1371/journal.pone.0139466
Alternate JournalPLoS ONE
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