Rice Premature Leaf Senescence 2 , Encoding a Glycosyltransferase (GT), Is Involved in Leaf Senescence

Frontiers in Plant Science
Min WangZhijun Cheng

Abstract

Premature leaf senescence (PLS), which has a significant impact on yield, is caused by various underlying mechanisms. Glycosyltransferases, which function in glycosyl transfer from activated nucleotides to aglycones, are involved in diverse biological processes, but their roles in rice leaf senescence remain elusive. Here, we isolated and characterized a leaf senescence-related gene from the Premature Leaf Senescent mutant (pls2). The mutant phenotype began with leaf yellowing at tillering and resulted in PLS during the reproductive stage. Leaf senescence was associated with an increase in hydrogen peroxide (H2O2) content accompanied with pronounced decreases in net photosynthetic rate, stomatal conductance, and transpiration rate. Map-based cloning revealed that a mutation in LOC_Os03g15840 (PLS2), a putative glycosyltransferase- encoding gene, was responsible for the defective phenotype. PLS2 expression was detected in all tissues surveyed, but predominantly in leaf mesophyll cells. Subcellular localization of the PLS2 was in the endoplasmic reticulum. The pls2 mutant accumulated higher levels of sucrose together with decreased expression of sucrose metabolizing genes compared with wild type. These data suggested that the PLS...Continue Reading

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Citations

Sep 23, 2018·International Journal of Molecular Sciences·Guang ChenLi Zhu
Jun 15, 2018·The Plant Journal : for Cell and Molecular Biology·Yongbo HongLiyong Cao
Dec 31, 2020·International Journal of Molecular Sciences·Chun LiXiao-Jian Deng
Jul 20, 2021·Cellular and Molecular Life Sciences : CMLS·Aakansha KanojiaPaul P Dijkwel

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Datasets Mentioned

BETA
EMT15626.1

Methods Mentioned

BETA
MDA
PCR
transgenic
High Performance Liquid Chromatography
glycosylation

Software Mentioned

dCAPS Finder

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