Effects of Plant Defense Signal Molecules Jasmonic Acid and Salicylic Acid on the Expression of Detoxification Enzyme Glutathione S-transferases and Salivary Protein C002 in Myzus persicae

Jasmonic acid (JA) and salicylic acid (SA) are important phytohormones for activating plant defense responses when
plants suffer from mechanical damage or pest infestation. In response to plant defense responses, insects usually
increase the detoxification enzyme activity or secrete some saliva proteins into plants to modulate host cell processes
to promote their adaptation. In this study, we used real-time qPCR to detect the relative gene expression of
detoxification enzyme named glutathione S-transferases (sigma GST) and salivary gland-specific protein C002 in
Myzus persicae after feeding with 5mM JA or 10mM SA through artificial diet. The results showed that the relative
expression of sigma GST and C002 in M. persicae increased significantly after JA and SA treatments. The results
revealed that M. persicae can use JA and SA as cues to up-regulate gene expression of related detoxification enzyme
and saliva protein. Our results provided new insights into the research on the mechanism of M. persicae adaptation to
host plant resistance.