Mechanism mediating the biosynthesis of the anti-insect volatile (Z)-3-hexenyl acetate in Acacia confusa Merr., an intercropping plant in tea plantations
文献类型： 外文期刊
作者： Jian, Guotai 1 ; Li, Jianlong 3 ; Wu, Yong 7 ; Liu, Chengshun 1 ; Li, Ronghua 1 ; Qian, Jiajia 1 ; Jia, Yongxia 1 ; Li, Hanxiang 1 ; Tang, Jinchi 3 ; Zeng, Lanting 1 ;
作者机构： 1.Chinese Acad Sci, Guangdong Prov Key Lab Appl Bot, 723 Xingke Rd, Guangzhou 510650, Peoples R China
2.Chinese Acad Sci, State Key Lab Plant Divers & Specialty Crops, South China Bot Garden, 723 Xingke Rd, Guangzhou 510650, Peoples R China
3.Guangdong Acad Agr Sci, Tea Res Inst, 6 Dafeng Rd, Guangzhou 510640, Peoples R China
4.Guangdong Prov Key Lab Tea Plant Resources Innovat, 6 Dafeng Rd, Guangzhou 510640, Peoples R China
5.Chinese Acad Sci, Key Lab Natl Forestry & Grassland Adm Plant Conser, South China Bot Garden, 723 Xingke Rd, Guangzhou 510650, Peoples R China
6.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
7.Yingde City Meteorol Bur, 44 East Educ Rd, Qingyuan 513000, Peoples R China
关键词：
期刊名称：MOLECULAR HORTICULTURE （ 影响因子：8.1； 五年影响因子：11.0 ）
ISSN： 2730-9401
年卷期： 2025 年 5 卷 1 期
页码：
收录情况： SCI
摘要： Intercropping tea plants with Acacia confusa Merr. offers an environmentally sustainable approach to insect population control in tea plantations. However, the primary compounds in A. confusa responsible for this effect and their biosynthetic mechanisms remain undetermined. This study identified (Z)-3-hexenyl acetate, (Z)-3-hexenol, and 1-hexanol as the major volatiles in A. confusa. Field experiments demonstrated that all three compounds affected the tea leafhopper, a significant pest. (Z)-3-Hexenyl acetate repelled leafhoppers, while the other two compounds attracted them. Leafhopper feeding on tea leaves significantly decreased after fumigation with (Z)-3-hexenyl acetate, potentially altering the metabolism of defensive substances in tea leaves. These findings suggest (Z)-3-hexenyl acetate as a crucial component for pest control in tea plantations intercropped with A. confusa. Furthermore, the study identified the nucleus- and cytoplasm-localized AcAAT4 in A. confusa as responsible for (Z)-3-hexenyl acetate biosynthesis. Notably, AcAAT4 expression and the production of the upstream transcription factor AcMYC2b corresponded to the (Z)-3-hexenyl acetate emission pattern. The research also elucidated the positive regulatory effects of nucleus-localized AcMYC2b on AcAAT4 expression. These findings elucidate the molecular basis of (Z)-3-hexenyl acetate emission from A. confusa and provide a theoretical foundation for enhancing intercropping practices in tea plantations.
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