Cellular & Molecular Biology Letters | |
AtGRP7 is involved in the regulation of abscisic acid and stress responses in arabidopsis | |
Ran Jing1  Shiyong Song1  Guosheng Xu1  Shuqing Cao1  Li Jiang1  | |
[1] School of Biotechnology and Food Engineering, Hefei University of Technology, Anhui, China$$ | |
关键词: Abscisic acid; Osmotic stress; | |
DOI : 10.2478/s11658-006-0042-2 | |
学科分类:分子生物学,细胞生物学和基因 | |
来源: Uniwersytet Wroclawski * Wydzial Biotechnologii / University of Wroclaw, Faculty of Biotechnology | |
【 摘 要 】
The Arabidopsis AtGRP7 gene, encoding a glycine-rich RNA-binding protein, has been shown to be involved in the regulation of a circadian-regulated negative feedback loop. However, little is known about the role of AtGRP7 in mediating abscisic acid (ABA) and stress responses. Here, we show that AtGRP7 plays a role in both. AtGRP7 was repressed by ABA, high salt and mannitol. Disruption of AtGRP7 by T-DNA insertion led to hypersensitive responses to ABA in both seed germination and root growth assays. The atgrp7-1 mutant was also hypersensitive to osmotic stress conditions, such as high salt and high concentrations of mannitol. In addition, the atgrp7-1 mutant plants accumulated significantly higher transcript levels of two ABA-and stress-inducible genes, RD29A and RAB18, compared with the wild-type plants. Taken together, these results suggest that AtGRP7 is involved in the regulation of ABA and stress responses.
【 授权许可】
Unknown
【 预 览 】
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