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Lipid Remodeling Underlies Salt Tolerance in Carex rigescens: A Comparative Lipidomic Analysis

文献类型： 外文期刊

作者： Zhang, Jie;Wu, Yiming;Ma, Chengze;Shi, Yi;Li, Mingna;Hu, Qiannan

作者机构：

关键词： Phospholipids;Glycolipids;Salt stress;Turfgrass;Carex rigescens

期刊名称： JOURNAL OF PLANT GROWTH REGULATION

ISSN： 0721-7595

年卷期： 2026 年

页码：

收录情况： SCIE（2025版）

摘要： Soil salinization critically threatens agricultural sustainability by disrupting plant membrane integrity and lipid homeostasis. To elucidate lipid-mediated salt tolerance mechanisms in the ecologically important turfgrass Carex rigescens, comparative lipidomic profiling was conducted on salt-tolerant ('Lvping No.2') and salt-sensitive ('Lvping No.1') genotypes subjected to 300 mM NaCl. Results revealed that the tolerant genotype uniquely maintained structural phospholipid levels (notably phosphatidylcholine and phosphatidylethanolamine) with elevated root PC: PE ratios, stabilized plastidic membrane lipids (monogalactosyldiacylglycerol, digalactosyldiacylglycerol, phosphatidylglycerol) which were essential for photosynthesis, and enhanced unsaturation indices across phospholipids and glycerolipids. These coordinated adaptations minimized membrane peroxidation while optimizing fluid dynamics under salinity stress. The study demonstrates that lipid remodeling-notably through root membrane stabilization and photosynthetic protection-serves as a key adaptive strategy for salinity tolerance, offering critical biomarkers for developing salt-tolerant grass germplasm.

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