Dynamic Resistant Starch Accumulation in Contrasting Wheat Genotypes Highlights the Lipid Metabolic Pathway Related to Resistant Starch Synthesis
文献类型： 外文期刊
作者： Wang, Hong-Pan 1 ; Cai, Hai-Ya 1 ; Zhu, Jing-Huan 2 ; Wei, Xia 3 ; Zhang, Shuo 1 ; Liu, Gang 1 ; He, Yong-Gang 1 ; Li, Bo 3 ; Xu, Le 3 ; Jiao, Chun-Hai 1 ; Hua, Wei 2 ; Xu, Yan-Hao 1 ;
作者机构： 1.Hubei Acad Agr Sci, Food Crops Inst, Hubei Key Lab Food Crop Germplasm & Genet Improve, Wuhan 430064, Peoples R China
2.Zhejiang Acad Agr Sci, Inst Crop & Nucl Technol Utilizat, Hangzhou 310021, Peoples R China
3.Yangtze Univ, Hubei Collaborat Innovat Ctr Grain Ind, Hubei Key Lab Waterlogging Disaster & Agr Use Wet, Jingzhou 434025, Peoples R China
关键词： resistant starch; wheat; secondary accumulation; transcriptome; lipid metabolism pathway
期刊名称：AGRICULTURE-BASEL （ 影响因子：3.408； 五年影响因子：3.459 ）
ISSN：
年卷期： 2022 年 12 卷 2 期
页码：
收录情况： SCI
摘要： Resistant starch (RS) shows several health benefits. Enhancing the RS content of wheat is of major commercial importance. However, knowledge regarding the RS synthesis mechanism in wheat remains limited. In this study, the dynamic accumulation of RS during the filling process in two wheat (Triticum aestivum L.) genotypes with contrasting RS contents (H242, high RS content; H189, low RS content) were investigated. The results demonstrate that beyond 25 days after pollination (DAP), the RS content of H189 was relatively stable, but that of H242 continued to increase. Secondary accumulation was observed in the high-RS-content wheat genotype. A comparative transcriptome analysis between H242 and H189 at 20 DAP and 35 DAP showed that the differentially expressed genes were mainly involved in glycerolipid metabolism, glycerophospholipid metabolism and glucuronate interconversions. Furthermore, weighted gene coexpression network analysis suggested that lipid metabolic pathways such as the glycerophospholipid metabolism pathway might be involved in RS synthesis, and lipid-related genes upregulated beyond 25 DAP resulted in RS secondary accumulation. This work provides insight into the characteristics and mechanisms of RS synthesis.
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