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A dehydration‐induced NAC protein, RD26, is involved in a novel ABA‐dependent stress‐signaling pathway
Author(s) -
Fujita Miki,
Fujita Yasunari,
Maruyama Kyonoshin,
Seki Motoaki,
Hiratsu Keiichiro,
OhmeTakagi Masaru,
Tran LamSon Phan,
YamaguchiShinozaki Kazuko,
Shinozaki Kazuo
Publication year - 2004
Publication title -
the plant journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.058
H-Index - 269
eISSN - 1365-313X
pISSN - 0960-7412
DOI - 10.1111/j.1365-313x.2004.02171.x
Subject(s) - abscisic acid , arabidopsis , abiotic stress , gene , complementary dna , arabidopsis thaliana , gene expression , activator (genetics) , microbiology and biotechnology , biology , genetically modified crops , transgene , biochemistry , mutant
Summary Arabidopsis thaliana RD26 cDNA, isolated from dehydrated plants, encodes a NAC protein. Expression of the RD26 gene was induced not only by drought but also by abscisic acid (ABA) and high salinity. The RD26 protein is localized in the nucleus and its C terminal has transcriptional activity. Transgenic plants overexpressing RD26 were highly sensitive to ABA, while RD26 ‐repressed plants were insensitive. The results of microarray analysis showed that ABA‐ and stress‐inducible genes are upregulated in the RD26 ‐overexpressed plants and repressed in the RD26 ‐repressed plants. Furthermore, RD26 activated a promoter of its target gene in Arabidopsis protoplasts. These results indicate that RD26 functions as a transcriptional activator in ABA‐inducible gene expression under abiotic stress in plants.