Zhang Zhijun, Zhang Jiahui, Li Xiaowei, Zhang Jinming, Wang Yunsheng, Lu Yaobin
State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China.
Hunan Provincial Key Laboratory for Biology and Control of Plant Diseases and Insect Pests, Hunan Agricultural University, Changsha 410125, China.
Int J Mol Sci. 2023 Sep 24;24(19):14493. doi: 10.3390/ijms241914493.
The transmission of insect-borne viruses involves sophisticated interactions between viruses, host plants, and vectors. Chemical compounds play an important role in these interactions. Several studies reported that the plant virus tomato spotted wilt orthotospovirus (TSWV) increases host plant quality for its vector and benefits the vector thrips . However, few studies have investigated the chemical ecology of thrips vectors, TSWV, and host plants. Here, we demonstrated that in TSWV-infected host plant , (1) were more attracted to feeding on TSWV-infected ; (2) atropine and scopolamine, the main tropane alkaloids in , which are toxic to animals, were down-regulated by TSWV infection of the plant; and (3) had better biological performance (prolonged adult longevity and increased fecundity, resulting in accelerated population growth) on TSWV-infected than on TSWV non-infected plants. These findings provide in-depth information about the physiological mechanisms responsible for the virus's benefits to its vector by virus infection of plant regulating alkaloid accumulation in the plant.
虫媒病毒的传播涉及病毒、寄主植物和传毒介体之间复杂的相互作用。化学化合物在这些相互作用中起着重要作用。多项研究报道，植物病毒番茄斑萎正番茄斑萎病毒（TSWV）提高了其传毒介体的寄主植物质量，并对传毒介体蓟马有益。然而，很少有研究调查蓟马传毒介体、TSWV和寄主植物的化学生态学。在此，我们证明，在感染TSWV的寄主植物中，（1）更倾向于取食感染TSWV的植物；（2）植物中的主要托烷生物碱阿托品和东莨菪碱对动物有毒，植物感染TSWV后其含量下调；（3）与未感染TSWV的植物相比，蓟马在感染TSWV的植物上具有更好的生物学性能（成虫寿命延长、繁殖力增加，导致种群增长加速）。这些发现提供了关于植物病毒感染通过调节植物生物碱积累而使病毒对其传毒介体有益的生理机制的深入信息。
