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Fructose-6-phosphate-2-kinase/fructose-2,6-bisphosphatase regulates energy metabolism and synthesis of storage products in developing rice endosperm

Plant Sci. 2022-10; 
Xiaoli Chen , Yi Ji , Weiying Zhao , Huanying Niu , Xue Yang , Xiaokang Jiang , Yipeng Zhang , Jie Lei , Hang Yang , Rongbo Chen , Chuanwei Gu , Hongyi Xu , Hui Dong , Erchao Duan , Xuan Teng , Yunlong Wang , Yuanyan Zhang , Wenwei Zhang , Yihua Wang , Jianmin Wan
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摘要

Starch accounts for about 80-85 % of the dry weight of grains and determines yield by impact on grain weight. And, the content and composition of starch also determine appearance, eating, cooking and nutritional quality of rice. By coordinating crucial reactions of the primary carbohydrate metabolism in all eukaryotes, fructose-2,6-bisphosphate (Fru-2,6-P2) is a traffic signal in metabolism. However, the metabolic regulation of starch in plant sink tissues by Fru-2,6-P2 remains unclear. Here we isolated rice mutant floury endosperm23 (flo23) which has opaque endosperm and anomalous compound starch grains (SGs). flo23 mutant grains had reduced contents of starch, lipids and proteins. Map-based cloning and geneti... More

关键词

6-P(2); Energy metabolism; Fru-2; Glycolysis; Oryza sativa; Starch synthesis.