Melatonin enhances drought tolerance by affecting jasmonic acid and lignin biosynthesis in wheat (Triticum aestivum L.)
文献类型: 外文期刊
作者: Mingzhao Luo;Daoping Wang;Pierre Delaplace;Yinghong Pan;Yongbin Zhou;Wensi Tang;Kai Chen;Jun Chen;Zhaoshi Xu;Youzhi Ma;Ming Chen
作者机构:
关键词: Biostimulant;Drought;Hydrogen peroxide;Jasmonic acid;Lignin biosynthesis;Melatonin;Wheat
期刊名称: Plant Physiology and Biochemistry
ISSN: 0981-9428
年卷期: 2023 年 202 卷
页码:
收录情况: SCIE(2023版)
摘要: Drought severely affects the yield of wheat (Triticum aestivum L.), which is mainly grown in arid and semi-arid regions. Melatonin plays an important role in various types of stress resistance in plants, including drought resistance. However, the molecular mechanism through which melatonin affects drought tolerance remains largely unknown. In this study, we revealed that melatonin (100 μM) significantly improved drought resistance during the maturation stage of Chinese Spring, Shi4185, and Hanxuan10 varieties, but not Chang6878. Further physiological, transcriptomic, and proteomic data analysis at the wheat seedling stage revealed that melatonin increased jasmonic acid (JA) content, upregulating the expression of JA genes (LOX1.5 and LOX2.1) and two transcription factors (HY5 and MYB86) under drought conditions. It also upregulated genes related to lignin biosynthesis (4CL2, P5CS1, and CCR2) as well as starch and sucrose metabolism (PME53 and SUS4). Additionally, melatonin alleviated photosynthetic and cell membrane damage caused by drought stress through maintaining low levels of hydrogen peroxide. The current results elucidate melatonin-regulated pathways in wheat and provide evidence for using melatonin as a potential biostimulant to improve wheat drought resistance under field conditions in the future.
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