Scientists have revealed new mechanisms for regulating granules and anti-reverses of rice glyco-based transferases
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Last Update: 2021-03-02
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Source: Internet
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Author: User
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Research Group of Lin Hongxuan, Center for Excellence and Innovation in Molecular Plant Science of the Chinese Academy of Sciences, revealed a new mechanism for rice glycosyl transferase to affect metabolic flow reorientation, which in turn regulates the size and resistance of rice grains at the same time. On May 26th, the research paper was published in Nature -Communication.
-particle type is one of the main factors affecting rice yield, while rice yield is often affected by arid, high salt and high temperature and other abate stress, how to improve rice yield while enhancing rice resistance is a challenge for researchers and breeders. Plants need to constantly adjust their metabolic flow to different stages of development and growth, but little is known about this in crops.
research team located the clone to a QTL GSA1 that regulates both rice grain size and resistance by the method of map cloning. GSA1 is a positive regulatory factor of grain type and resistance, over-expression GSA1 increases the size and grain weight of rice grains, and increases the resistance of rice to high salt, drought and high temperature. Analysis of nucleotide polymorphisms shows that GSA1 is artificially selected during the domestication of wild rice in Africa for rice cultivation in Africa and the domestication of wild rice in Asia into indica. GSA1 encodes a rice glycosyl transfer enzyme UCT83A1, in-body experiments confirm that GSA1 has a broad spectrum of glycosyl transferase activity, with urea diphosphate (UDP) as a glycosyl supply, with shannaphenol, grapefruitin and Flavonoid metabolites such as quercetin are glycosyl transfer subjects that regulate flavonoid glycoside spectrum in rice, indirectly affect the polar transport of flavonoid-mediated growth hormone and gene expression associated with growth hormone, and ultimately regulate rice granules by affecting cell division and cell proliferation. At the same time, GSA1 can also use ligand monosomes such as pine cypress alcohol, coriander alcohol and mustard alcohol as glycosyl transfer subjects to regulate ligand content, which may also be the reason for regulating rice granules. Further studies in GSA1CG14 (African rice sites) in
further studies show that GSA1 participating in metabolic flow under adversity stress is redirected from the ligand synthesis pathway to the flavonoid glycoside synthesis pathway, the ligand synthesis pathway is reduced and the flavonoid glycoside including anthratin synthesis-related pathway is increased, resulting in increased rice resistance. Excessive expression of GSA1WYJ significantly increased the content of flavonoid glycoside and antholine under adversity stress, resulting in increased rice resistance. Knocking out GSA1 causes the disorder of reorientation of metabolic flow under adversity, the synthesis of flavonoid glycoside is blocked, and the resistance of rice is weakened.
experts say the study reveals a new mechanism by which glyco-based transferase regulates metabolic flow reorientation and then simultaneously regulates rice granules and resistance, providing valuable genetic resources for the cultivation of new varieties of high-yielding and high-resistant crops.
that the work was supported by the Ministry of Science and Technology, the Chinese Academy of Sciences and the National Natural Science Foundation of China. (Source: Huang Xin Yang Zheng line, China Science Journal)
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