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Title 

Identification of a drought responsive gene encoding a nuclear protein involved in drought and freezing stress tolerance in Arabidopsis

Authors 

H D MoonM S LeeS H KimWon Joong JeongD W Choi

Publisher 

Springer Verlag (Germany)

Issue Date 

2016

Citation 

Biologia Plantarum, vol. 60, no. 1, pp. 105-112

Keywords 

DRGdrg knock out mutantEscherichia colimannitoltransgenic plants

Abstract 

Plants have developed adaptive strategies to survive under different abiotic stressors. To identify new components involved in abiotic stress tolerance, we screened unannotated expressed sequence tags (ESTs) and evaluated their cold or drought response in Arabidopsis. We identified a drought response gene (DRG) encoding a 39.5-kDa polypeptide. This protein was expressed specifically in siliques and was induced by drought stress in most tissues. When a DRG-GFP construct was introduced into Arabidopsis protoplasts, GFP signals were detected only in the nucleus. The drg mutant plant was more sensitive to mannitol-induced osmotic stress in agar plates and to drought or freezing stress in soil than the wild-type. Activating the DRG restored the normal sensitivity of drg mutants to abiotic stressors. No differences in drought or freezing tolerance were observed between the wild-type and transgenic plants overexpressing the DRG. When DRG was expressed in a cold-sensitive Escherichia coli strain BX04, the transformed bacteria grew faster than the untransformed BXO4 cells under cold stress. These results demonstrate that DRG is a nuclear protein induced by abiotic stresses and it is required for drought and freezing tolerance in Arabidopsis.

ISSN 

0006-3134

Link 

http://dx.doi.org/10.1007/s10535-015-0567-1

Appears in Collections

1. Journal Articles > Journal Articles

Registered Date

2019-05-02


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