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Dong, Nai-Qian; Sun, Yuwei; Guo, Tao; Shi, Chuan-Lin; Zhang, Yi-Min; Kan, Yi; Xiang, You-Huang; Zhang, Hai; Yang, Yi-Bing; Li, Ya-Chao; Zhao, Huai-Yu; Yu, Hong-Xiao; Lu, Zi-Qi; Wang, Yong; Ye, Wang-Wei; Shan, Jun-Xiang; Lin, Hong-Xuan
Nature communications, 05/2020, Letnik: 11, Številka: 1Journal Article
Grain size is an important component trait of grain yield, which is frequently threatened by abiotic stress. However, little is known about how grain yield and abiotic stress tolerance are regulated. Here, we characterize GSA1, a quantitative trait locus (QTL) regulating grain size and abiotic stress tolerance associated with metabolic flux redirection. GSA1 encodes a UDP-glucosyltransferase, which exhibits glucosyltransferase activity toward flavonoids and monolignols. GSA1 regulates grain size by modulating cell proliferation and expansion, which are regulated by flavonoid-mediated auxin levels and related gene expression. GSA1 is required for the redirection of metabolic flux from lignin biosynthesis to flavonoid biosynthesis under abiotic stress and the accumulation of flavonoid glycosides, which protect rice against abiotic stress. GSA1 overexpression results in larger grains and enhanced abiotic stress tolerance. Our findings provide insights into the regulation of grain size and abiotic stress tolerance associated with metabolic flux redirection and a potential means to improve crops.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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