Figure 5.

Evaluation of three antioxidant enzymes, including superoxide dismutase (SOD), polyphenol oxidase (PPO), and peroxidase (POX) in squash plants. Mock: squash plants foliar sprayed with sterile nutrient broth and mocked with viral inoculation buffer; infected: squash plants mechanically inoculated with ZYMV with foliar spraying of sterile nutrient broth; protective: squash plants sprayed with Paenibacillus polymyxa strain SZYM-CF 24 h before ZYMV inoculation; curative: squash plants sprayed with SZYM-CF 24 h after ZYMV inoculation. The mean values of each column with the same letter do not differ significantly.