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Function, transport, and regulation of amino acids: What is missing in rice?

The Crop Journal 2021年第3期9卷 530-542页

作者： Nan Guo Shunan Zhang MingjiGu Guohua Xu Key Laboratory of Plant Functional Genomics of the Ministry of Education/Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding College of Horticulture and Plant ProtectionYangzhou UniversityYangzhou 225009JiangsuChina State Key Laboratory of Crop Genetics and Germplasm Enhancement MOA Key Laboratory of Plant Nutrition and Fertilization in Lower-Middle Reaches of the Yangtze RiverNanjing Agricultural UniversityNanjing 210095JiangsuChina

Amino acids are essential plant compounds serving as the building blocks of proteins,the predominant forms of nitrogen(N)distribution,and signaling *** amino acids derive from root acquisition,nitrate reduction,and ammonium *** amino acid transporters(AATs)mediating transfer processes of amino acids have been functionally characterized in Arabidopsis,whereas the function and regulation of the vast majority of AATs in rice(Oryza sativa L.)and other crops remain *** this review,we summarize the current understanding of amino acids in the rhizosphere and in *** describe their function as signal molecules and in regulating plant architecture,flowering time,and defense against abiotic stress and pathogen *** not only function in root acquisition and translocation of amino acids from source to sink organs,regulating N uptake and use efficiency,but also as transporters of non-amino acid substrates or as amino acid *** AAT genes show natural variations in their promoter and coding regions that are associated with altered uptake rate of amino acids,grain N content,and tiller *** of an amino acid transfer model in plants will advance the manipulation of AATs for improving rice architecture,grain yield and quality,and N-use efficiency.

关键词： Amino acids Amino acid transporter Grain quality nitrogen uptake efficiency nitrogen utilization efficiency Rice architecture

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