The aims of the present study are (a) to identify the TeMV infection in P. edulis in Zhangzhou City of Fujian Province by traditional electron microscopy, RT-PCR and modern small RNA deep sequencing, (b) to examine the effect of TeMV infection on contents of phytochemicals in the fruits, (c) to investigate the role of individual antioxidative enzymes (SOD and CAT) in protection of P. edulis plants against oxidative damage caused by virus infection. The gene discussed is SOD1; the disease is viral infectious disease.