C-alkylated flavonoids from the whole plants of Desmodium caudatum and their anti-TMV activity.

C-Alkylated flavonoids showed potent activities against TMV with multiple modes of actions. The increased of defense-related enzyme activities, up-regulate the expression of defense related genes, down-regulate the expression of Hsp70 protein by inhibiting the related Hsp genes are involved in tobacco resistance to TMV. By above actions, the infection of TMV was influenced, thereby achieving the effects of control TMV. The successful isolation of the above flavonoids provide the new source of biopesticides to TMV proliferation, and also contribute to the utilization of D. caudatum. This article is protected by copyright. All rights reserved.