脱落酸
代谢组
转录组
生物
代谢途径
代谢组学
生物化学
一氧化氮
WRKY蛋白质结构域
类黄酮生物合成
代谢物
类黄酮
新陈代谢
植物
抗氧化剂
基因
基因表达
生物信息学
内分泌学
作者
Zhen Peng,Ye Wang,Wen-Tian Zuo,Yuerong Gao,Runzhi Li,Chunxin Yu,Ziyan Liu,Yi Zheng,Yuan‐Yue Shen,Liu-Sheng Duan
标识
DOI:10.3389/fpls.2021.764625
摘要
Liriope spicata is an evergreen perennial ornamental groundcover with a strong freezing tolerance. However, the molecular mechanism underlying the freezing tolerance in L. spicata remains unclear. In this study, a comprehensive investigation of L. spicata freezing tolerance was conducted at the levels of physiology and biochemistry, metabolite, and transcript during the stress treatment. There were 581 unique differentially expressed metabolites (DEMs) and 10,444 unique differentially expressed genes (DEGs) between freezing treatment and normal cultured plant in leaves. Integrated analysis of metabolomics and transcriptomics showed that flavonoid biosynthesis, carbohydrate metabolism, amino acid metabolism, lipid metabolism, and signal transduction pathways were prominently enriched in response to the freezing stress in L. spicata. Now, we identified genes and metabolites involved in the flavonoid pathway, abscisic acid (ABA) biosynthesis, and the oxidative synthesis pathway of nitric oxide (NO), which may form a regulatory network and play a synergistic effect in osmotic adjustment, reactive oxygen species (ROS) homeostasis, and stomatal closure under freezing stress. These results offer a comprehensive network of flavonoids, ABA, and NO comodulating the freezing tolerance in L. spicata.
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