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Title 

The role of water channel proteins and nitric oxide signaling in rice seed germination

Authors 

H Y LiuX YuD Y CuiM H SunW N SunZ C TangSang Soo KwakW A Su

Publisher 

Nature Publishing Group

Issue Date 

2007

Citation 

Cell Research, vol. 17, no. 7, pp. 638-649

Keywords 

germinationnitric oxideoryza sativaover-expressionsilencingwater channelnitric oxide donorwaterplant seed

Abstract 

Previous studies have demonstrated the possible role of several aquaporins in seed germination. But systematic investigation of the role of aquaporin family members in this process is lacking. Here, the developmental regulation of plasma membrane intrinsic protein (PIP) expression throughout germination and post-germination processes in rice embryos was analyzed. The expression patterns of the PIPs suggest these aquaporins play different roles in seed germination and seedling growth. Partial silencing of the water channel genes, OsPIP1; 1 and OsPIP1; 3, reduced seed germination while over-expression of OsPIP1; 3 promoted seed germination under water-stress conditions. Moreover, spatial expression analysis indicates that OsPIP1; 3 is expressed predominantly in embryo during seed germination. Our data also revealed that the nitric oxide (NO) donors, sodium nitroprusside (SNP) and S-nitrosoglutathione (GSNO), promoted seed germination; furthermore, the NO scavenger, 2-(4-carboxyphenyl)-4,4,5,5- tetramethylimidazoline-1-oxyl-3-oxide, inhibited germination and reduced the stimulative effects of SNP and GSNO on rice germination. Exogenous NO stimulated the transcription of OsPIP1; 1, OsPIP1; 2, OsPIP1; 3 and OsPIP2; 8 in germinating seeds. These results suggest that water channels play an important role in seed germination, acting, at least partly, in response to the NO signaling pathway.

ISSN 

1001-0602

Link 

http://dx.doi.org/10.1038/cr.2007.34

Appears in Collections

1. Journal Articles > Journal Articles

Registered Date

2019-05-02


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