Perilla frutescens repels and controls Bemisia tabaci MED with its key volatile linalool and caryophyllene
文献类型： 外文期刊
作者： Gao, Liming 1 ; Wei, Yan 2 ; Li, Kailong 2 ; Chen, Jianbin 2 ; Wang, Pei 2 ; Du, Jiao 2 ; Peng, Jing 2 ; Gao, Yang 2 ; Zhang, Zhanhong 3 ; Liu, Yong 1 ; Shi, Xiaobin 1 ; Zhang, Deyong 1 ;
作者机构： 1.Hunan Univ, Coll Biol, Longping Branch, Changsha 410125, Peoples R China
2.Inst Plant Protect, Hunan Acad Agr Sci, Changsha 410125, Peoples R China
3.Hunan Acad Agr Sci, Inst Vegetable, Changsha 410125, Peoples R China
4.Yuelushan Lab, Changsha 410125, Peoples R China
关键词： Bemisia tabaci; Perilla frutescens; Volatile organic compounds; Behavioral responses; Enzyme activity
期刊名称：CROP PROTECTION （ 影响因子：2.5； 五年影响因子：2.8 ）
ISSN： 0261-2194
年卷期： 2024 年 184 卷
页码：
收录情况： SCI
摘要： Insects can recognize volatile organic compounds (VOCs), which are crucial for plant-insect interaction and agricultural pest control. B. tabaci is a global pest in agriculture, and it has developed varying degrees of resistance to commercial insecticides. This study investigates to the repellent and insecticidal activities of the VOCs from P. frutescens in B. tabaci. The components and relative contents of the VOCs collected from perilla leaves were analyzed by gas chromatography-mass spectrometry (GC-MS). Our results showed the VOCs of P. frutescens leaves were mainly linalool (31.62%) and caryophyllene (23.25%). Subsequently, the behavioral response of B. tabaci to the concentrations of caryophyllene and linalool was investigated using the Y-tube olfactometer, and caryophyllene was more effective than linalool in repelling B. tabaci. Molecular docking and RT-qPCR results indicated that caryophyllene and linalool bind to OBP8 and OBP2, and the expression levels of OBP8 and OBP2 in B. tabaci were reduced, respectively. In addition, the control effect of the key volatile on B. tabaci was explored through leaf dipping and enzyme activity assays. Caryophyllene showed a good insecticidal effect on B. tabaci. The mortality rate of 0.125-0.5 mu L/mL caryophyllene on B. tabaci was 51.11-67.78%, which effectively reduced the damage caused by B. tabaci to crops. Besides, caryophyllene affected the acetylcholinesterase (AchE), carboxylesterase (CarE), and glutathione S-transferases (GSTs) enzyme activities of B. tabaci. These findings may provide valuable information for the integrated management of B. tabaci.
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