Isobavachalcone Alleviates Plant Photosynthesis Inhibition Caused by Tobacco Mosaic Virus (TMV) Infection in Tobacco.

ABSTRACT: Viral infection affects photosynthesis in plants, significantly reducing crop yield and quality. This study investigated the effects of isobavachalcone (IBC), a natural compound extracted from the plant Psoralea corylifolia L., on photosynthesis in tobacco under tobacco mosaic virus (TMV; species Tobamovirus tabaci, family Virgaviridae) stress. TMV infection significantly reduced the chlorophyll content, Rubisco activity, net photosynthetic rate (Pn), stomatal conductance (Gs), intercellular CO₂ concentration (Ci), and transpiration rate (Tr) in tobacco leaves. However, exogenous application of IBC (40 mg/L) effectively alleviated the negative impacts of TMV. Compared with the inoculated control, IBC treatment increased the chlorophyll content by 16.00-100.6

SUBMITTER: Guan L 

PROVIDER: S-EPMC12694454 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature