OsPIN1b is Involved in Rice Seminal Root Elongation by Regulating Root Apical Meristem Activity in Response to Low Nitrogen and Phosphate

Scientific Reports
Huwei SunYali Zhang

Abstract

The response of plant root development to nutrient deficiencies is critical for crop production. Auxin, nitric oxide (NO), and strigolactones (SLs) are important regulators of root growth under low-nitrogen and -phosphate (LN and LP) conditions. Polar auxin transport in plants, which is mainly dependent on auxin efflux protein PINs, creates local auxin maxima to form the basis for root initiation and elongation; however, the PIN genes that play an important role in LN- and LP-modulated root growth remain unclear. qRT-PCR analysis of OsPIN family genes showed that the expression of OsPIN1b is most abundant in root tip and is significantly downregulated by LN, LP, sodium nitroprusside (SNP, NO donor), and GR24 (analogue of SLs) treatments. Seminal roots in ospin1b mutants were shorter than those of the wild type; and the seminal root, [3H]IAA transport, and IAA concentration responses to LN, LP, SNP, and GR24 application were attenuated in ospin1b-1 mutants. pCYCB1;1::GUS expression was upregulated by LN, LP, SNP, and GR24 treatments in wild type, but not in the ospin1b-1 mutant, suggesting that OsPIN1b is involved in auxin transport and acts as a downstream mediator of NO and SLs to induce meristem activity in root tip in rice u...Continue Reading

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Citations

Aug 15, 2019·Plant & Cell Physiology·Yong LiChuanzao Mao
Jan 24, 2020·Journal of Experimental Botany·Zhongtao Jia, Nicolaus von Wirén
Mar 12, 2020·International Journal of Molecular Sciences·Deok Hyun SeoGeupil Jang
Dec 12, 2019·Frontiers in Plant Science·Huwei SunYali Zhang
Oct 20, 2019·International Journal of Molecular Sciences·Huwei SunYali Zhang
Apr 4, 2021·International Journal of Molecular Sciences·Yun-Shil GhoKi-Hong Jung
Mar 13, 2021·Journal of Integrative Plant Biology·Dong Liu
Dec 18, 2021·Molecular Plant·Zhongtao JiaNicolaus von Wirén

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