OsSIDP366, a DUF1644 gene, positively regulates responses to drought and salt stresses in rice

doi:10.1111/jipb.12376

J Integr Plant Biol. ›› 2016, Vol. 58 ›› Issue (5): 492-502.DOI: 10.1111/jipb.12376

• Plant-environmental Interactions • Previous Articles Next Articles

OsSIDP366, a DUF1644 gene, positively regulates responses to drought and salt stresses in rice

Chiming Guo^1†, Chengke Luo^1†‡, Lijia Guo^1‡, Min Li¹, Xiaoling Guo², Yuxia Zhang¹, Liangjiang Wang³ and Liang Chen^1*

¹Xiamen Key Laboratory for Plant Genetics, School of Life Sciences, Xiamen University, Xiamen, China
²College of the Environment and Ecology, Xiamen University, Xiamen, China
³Department of Genetics and Biochemistry, Clemson University, Clemson, South Carolina, USA

Received:2015-03-17 Accepted:2015-07-07 Published:2015-07-14
About author:^†These authors contributed equally to this work.
^‡Present address: Chengke Luo, Development Center of New Technique Application and Research, Ningxia University, Yinchuan 750021, China. Lijia Guo, Key Laboratory of Integrated Pest Management on Tropical Crops, Ministry of Agriculture, Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China.
^*Correspondence: E-mail: chenlg@xmu.edu.cn

Abstract

Abstract:

Domain of unknown function 1644 (DUF1644) is a highly conserved amino acid sequence motif present only in plants. Analysis of expression data of the family of DUF1644-containing genes indicated that they may regulate responses to abiotic stress in rice. Here we present our discovery of the role of OsSIDP366, a member of the DUF1644 gene family, in response to drought and salinity stresses in rice. Transgenic rice plants overexpressing OsSIDP366 showed enhanced drought and salinity tolerance and reduced water loss as compared to that in the control, whereas plants with downregulated OsSIDP366 expression levels using RNA interference (RNAi) were more sensitive to salinity and drought treatments. The sensitivity to abscisic acid (ABA) treatment was not changed in OsSIDP366-overexpressing plants, and OsSIDP366 expression was not affected in ABA-deficient mutants. Subcellular localization analysis revealed that OsSIDP366 is presented in the cytoplasmic foci that colocalized with protein markers for both processing bodies (PBs) and stress granules (SGs) in rice protoplasts. Digital gene expression (DGE) profile analysis indicated that stress-related genes such as SNAC1, OsHAK5 and PRs were upregulated in OsSIDP366-overexpressing plants. These results suggest that OsSIDP366 may function as a regulator of the PBs/SGs and positively regulate salt and drought resistance in rice.

Key words: Abiotic stress, DUF1644, processing bodies, rice, stress granules

Chiming Guo, Chengke Luo, Lijia Guo, Min Li, Xiaoling Guo, Yuxia Zhang, Liangjiang Wang, and Liang Chen. OsSIDP366, a DUF1644 gene, positively regulates responses to drought and salt stresses in rice[J]. J Integr Plant Biol., 2016, 58(5): 492-502.

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OsSIDP366, a DUF1644 gene, positively regulates responses to drought and salt stresses in rice

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