Infection of cucumber or tomato with cucumber mosaic virus (CMV) not only slows down photosynthesis and respiration but also leads to increased oxidative stress. These effects are accomplished by the same mechanism, namely changes to the electron transport system. Jing-Quan Yu and co-workers from Zhejiang University in China studied the long-term effect of CMV infection in the two plant species and noted, that the ‘normal’ electron flux decreased while the alternative flux increased significantly. This change was accompanied by increased superoxide dismutase activity and accumulation of H2O2.
Read full article here: Song et al. (March 2009) Physiologia Plantarum 135: 246-257