Article
Regulation of grain protein content by the amino acid permease gene OsAAP4 in rice.
TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik - 28 Jan 2026
Li Ming-Xin, Huang Feng-Lin, Lin Jin-Hong, Qu Jia-Yi, Wan Guo-Feng, Song Gen-Cai, Zhao Jing, Peng Yan, Teng Zhen-Ning, Liu Ling, Zheng Cheng, Wu Hou-Xiong, Yuan Ding-Yang, Duan Mei-Juan, Ye Neng-Hui, Meng Shuan
Abstract excerpt
Rice grain protein content is crucial for its quality and nutritional value, but the mechanisms of nitrogen transport to the grain remain poorly understood. This study demonstrates that the amino acid transporter OsAAP4 regulates protein accumulation in rice grains. OsAAP4 is expressed during grain filling, increasing at the mid-filling stage. Analysis of aap4 mutants in Zhonghua11 and Nipponbare backgrounds...
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