文献类型： 外文期刊
作者： Bai, Yang 1 ; Zhu, Xiaofang 1 ; Guo, Xinya 1 ; Zhang, Wenhua 1 ; Zhang, Guozheng 3 ; Chen, Huatao 4 ; Zhang, Qun 1 ;
作者机构： 1.Nanjing Agr Univ, State Key Lab Crop Genet & Germplasm Enhancement, Coll Life Sci, Nanjing, Peoples R China
2.Jiangsu Prov & Chinese Acad Sci, Nanjing Bot Garden Mem Sun Yat Sen, Inst Bot, Nanjing, Peoples R China
3.Nanjing Agr Univ, State Key Lab Crop Genet & Germplasm Enhancement, Coll Agr, Nanjing, Peoples R China
4.Jiangsu Acad Agr Sci, Inst Ind Crops, Nanjing 210014, Peoples R China
关键词： Phospholipids; triacylglycerol; freezing stress; soybean
期刊名称：PLANT SIGNALING & BEHAVIOR （ 影响因子：2.247； 五年影响因子：2.369 ）
ISSN： 1559-2316
年卷期： 2021 年 16 卷 1 期
页码：
收录情况： SCI
摘要： Aminoalcoholphosphotransferase (AAPT) utilizes diacylglycerols and cytidine diphosphate-choline/ethanolamine as substrates for the synthesis of phosphatidylcholine (PC)/phosphatidylethanolamine (PE). Plant AAPTs involved in phospholipid metabolism mediate diverse physiological processes; however, little is known about their functions in triacylglycerol (TAG) metabolism and seed germination. In the present study, we isolated and characterized two AAPTs, GmAAPT1 and GmAAPT2, from soybean (Glycine max). GmAAPT1 and GmAAPT2 exhibited strong similarity in their amino acid contents and expression patterns, and both were found to localize to the endoplasmic reticulum and Golgi apparatus. In vitro enzymatic analyses showed that GmAAPT1 and GmAAPT2 contributed to PC and PE synthesis and exhibited choline/ethanolamine phosphotransferase-like enzymatic properties. The overexpression of GmAAPT1 and GmAAPT2 in Arabidopsis led to reduced levels of seed TAG and polyunsaturated fatty acids and decreased seed germination under freezing stress. Together, these findings suggest that GmAAPTs mediate TAG metabolism and negatively regulate seed freezing tolerance.
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