AtGRP7 is involved in the regulation of abscisic acid and stress responses in Arabidopsis

• Autorzy: Cao S , Jiang L. , Song S. , Jing R. , Xu G.
• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

plant physiology; plant development; osmotic stress; abscisic acid; stress response; seed maturity; RNA binding protein; low temperature; Arabidopsis; AtGRP7 gene; plant hormone; stress condition

• Wydawca: -
• Czasopismo: Cellular and Molecular Biology Letters
• Rocznik: 2006
• Tom: 11
• Numer: 4
• Opis fizyczny: p.526-535,fig.,ref.

Twórcy

autor

Cao S

• Hefei University of Technology, Hefei, Anhui 230009, China

autor

Jiang L.

autor

Song S.

autor

Jing R.

autor

Xu G.

Bibliografia

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