Overexpression of the Phosphoserine Phosphatase-Encoding Gene (AtPSP1) Promotes Starch Accumulation in Lemna turionifera 5511 under Sulfur Deficiency
文献类型： 外文期刊
作者： Wang, Lei 1 ; Kuang, Yingying 1 ; Zheng, Siyu 1 ; Tong, Yana 2 ; Zhu, Yerong 1 ; Wang, Yong 1 ;
作者机构： 1.Nankai Univ, Coll Life Sci, Tianjin 300071, Peoples R China
2.Tianjin Acad Agr Sci, Tianjin 300192, Peoples R China
关键词： starch accumulation; AtPSP1 overexpression; sulfur deficiency; Lemna turionifera 5511
期刊名称：PLANTS-BASEL （ 影响因子：4.5； 五年影响因子：4.8 ）
ISSN：
年卷期： 2023 年 12 卷 5 期
页码：
收录情况： SCI
摘要： Duckweeds are well known for their high accumulation of starch under stress conditions, along with inhibited growth. The phosphorylation pathway of serine biosynthesis (PPSB) was reported as playing a vital role in linking the carbon, nitrogen, and sulfur metabolism in this plant. The overexpression of AtPSP1, the last key enzyme of the PPSB pathway in duckweed, was found to stimulate the accumulation of starch under sulfur-deficient conditions. The growth- and photosynthesis-related parameters were higher in the AtPSP1 transgenic plants than in the WT. The transcriptional analysis showed that the expression of several genes in starch synthesis, TCA, and sulfur absorption, transportation, and assimilation was significantly up- or downregulated. The study suggests that PSP engineering could improve starch accumulation in Lemna turionifera 5511 by coordinating the carbon metabolism and sulfur assimilation under sulfur-deficient conditions.
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