Uncovering mechanisms governing stem growth in peanut (Arachis hypogaea L.) with varying plant heights through integrated transcriptome and metabolomics analyses
文献类型： 外文期刊
作者： Zang, Xiuzhi 1 ; Liu, Juan 2 ; Zhao, Jihao 1 ; Liu, Jianbo 1 ; Ren, Jinfeng 1 ; Li, Liuyin 1 ; Li, Xiangdong 1 ; Yang, Dongqing 1 ;
作者机构： 1.Shandong Agr Univ, Coll Agron, Tai An 271018, Shandong, Peoples R China
2.Henan Acad Agr Sci, Ind Crops Res Inst, Zhengzhou 450002, Peoples R China
关键词： Arachis hypogaea L; Peanut plant height; Stem growth; Gibberellin; Brassinosteroid
期刊名称：JOURNAL OF PLANT PHYSIOLOGY （ 影响因子：4.3； 五年影响因子：4.5 ）
ISSN： 0176-1617
年卷期： 2023 年 287 卷
页码：
收录情况： SCI
摘要： The mechanisms responsible for stem growth in peanut (Arachis hypogaea L.) cultivars with varying plant heights remain unclear, despite the significant impact of plant height on peanut yield. Therefore, this study aimed to investigate the underlying mechanisms of peanut stem growth using phenotypic, physiological, transcriptomic, and metabolomic analyses. The findings revealed that the tallest cultivar, HY33, exhibited the highest rate of stem growth and accumulated the most stem dry matter, followed by the intermediate cultivar, SH108, while the dwarf cultivar, Df216, displayed the lowest values. Furthermore, SH108 exhibited a higher harvest index, as well as superior pod and kernel yields compared to both HY33 and Df216. Transcriptome and metabolome analyses identified differentially expressed genes (DEGs) and differentially expressed metabolites (DEMs) associated with phenylpropanoid and flavonoid biosynthesis. Notably, downregulated DEGs in Df216/HY33 and Df216/SH108 included phenylalanine ammonia-lyase (PAL), caffeoyl-CoA O-methyltransferase (COMT), and ferulate-5-hydroxylase (F5H), while downregulated DEMs included p-coumaryl alcohol, chlorogenic acid, and L-epicatechin. Compared to HY33, the reduced activities of PAL, COMT, and F5H resulted in a decreased stem lignin content in Df216. Additionally, downregulated DEGs involved in gibberellin (GA) and brassinosteroid (BR) biosynthesis were identified in Df216/HY33, which contributed to the lowest levels of GA1, GA3, and BR contents in Df216. The results suggest that the dwarf phenotype arises from impaired GA and BR biosynthesis and signaling, resulting in a slower stem growth rate and reduced lignin accumulation.
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