Physiological Modifications Caused by Plum Pox Virus in the Leaves of Peach and Apricot Tree

Abstract

Symptomatic and asymptomatic leaves of peach (sel. IF7230685) and apricot (cv. Tyrinthos) infected by
“plum pox virus” (PPV) were analysed for net photosynthesis, peroxidase activity and chlorophyl content. The presence
of the PPV in the leaves excised was verified with the ELISA test. The PPV affected the photosynthetic system
more strongly in peach than in apricot. Peroxidase activity (PA) and chlorophyl content were also affected. PA was a
good indicator of infection, and also made it possible to distinguish different degrees of infection.