The Plant Virus Tomato Spotted Wilt Orthotospovirus Benefits Its Vector Frankliniella occidentalis by Decreasing Plant Toxic Alkaloids in Host Plant Datura stramonium

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 quality for its vector benefits thrips Frankliniella occidentalis. However, few have investigated chemical ecology vectors, TSWV, plants. Here, we demonstrated TSWV-infected Datura stramonium, (1) F. occidentalis were more attracted to feeding on D. stramonium; (2) atropine scopolamine, main tropane alkaloids which are toxic animals, down-regulated by TSWV infection plant; (3) had better biological performance (prolonged adult longevity increased fecundity, resulting accelerated population growth) stramonium than non-infected These findings provide in-depth information about physiological mechanisms responsible virus’s regulating alkaloid accumulation plant.