A novel effect of glycine on the growth and starch biosynthesis of storage root in sweetpotato (Ipomoea batatas Lam.)
文献类型： 外文期刊
作者： Li, Chuanzhe 1 ; Yao, Wenjing 2 ; Wang, Jianping 3 ; Wang, Jidong 1 ; Ai, Yuchun 1 ; Ma, Hongbo 1 ; Zhang, Yongchun 1 ;
作者机构： 1.Minist Agr, Sci Observat & Expt Stn Arable Land Conservat Jia, Jiangsu Acad Agr Sci, Inst Agr Resources & Environm, Nanjing 210014, Jiangsu, Peoples R China
2.Nanjing Forestry Univ, Coinnovat Ctr Sustainable Forestry Southern China, Bamboo Res Inst, Coll Biol & Environm, 159 Longpan Rd, Nanjing 210037, Jiangsu, Peoples R China
3.Univ Florida, Dept Agron, Gainesville, FL 32610 USA
关键词： Ipomoea batatas Lam.; Glycine; Storage root; Starch metabolism; Hormone content; RNA-Seq
期刊名称：PLANT PHYSIOLOGY AND BIOCHEMISTRY （ 影响因子：4.27； 五年影响因子：4.816 ）
ISSN： 0981-9428
年卷期： 2019 年 144 卷
页码：
收录情况： SCI
摘要： Sweetpotato (Ipomoea batatas Lam.) plays an indispensable role in feed, starch-based industries and ethanol biofuel production. Few studies have investigated on how external amino acids affect the growth and production of sweetpotato. In the study, we evaluated morphological, physiological and molecular effects of external glycine (Gly) on the root growth and starch metabolism of sweetpotato, Xushul6. At morphological level, the Xushu16 with Gly stimuli had larger plant biomass than that under control condition. At physiological level, the photosynthesis strength of the Xushu16 with Gly treatments showed significant differences relative to those under control condition. The relative content of plant hormone and starch in storage roots was higher under Gly conditions than that under control condition. At molecular level, a total of 4836 differentially expression genes were identified in the storage roots with different Gly treatments by RNA-Seq. Among them, as many as 1830 genes were involved in carbohydrate metabolism, which held maximum proportion among all the DEGs. Further, a few genes involved in starch biosynthesis were proved to be Gly-induced significantly by RT-qPCR. All the results indicated extrinsic Gly promotes the growth of storage roots by strengthening photosynthesis and increasing plant hormone, and enhances starch biosynthesis of storage roots by accelerating carbohydrate metabolism and regulating the expression of starch-related genes.
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