Grafting Enhances Bacterial Wilt Resistance in Peppers

Ralstonia solanacearum is a causative agent of bacterial wilt and therefore poses serious threat to cultivated peppers (Capsicum annuum L.). Although attempts have been made control by grafting, the disease resistance mechanisms that protect grafted are poorly understood. Here, we grew composed rootstock Buyeding or Weishi scion Xinfeng 2. Following infection R. solanacearum, assessed differences in lipid peroxidation, cellular structure, root secondary metabolism, biomass, between plants controls. The exhibited greater biomass than after infection. cell ultrastructure showed only slight injury relative controls, roots were partially resistant solanacearum. Grafted pepper lower levels peroxidation. Lignin content, salicylic acid levels, activities phenylalanine ammonia lyase (PAL), peroxidase (POD), catalase (CAT), polyphenol oxidase (PPO), also higher plants. All these effects occurred concomitantly with increased resistance. Taken together, our findings demonstrate grafting can significantly improve pepper. Moreover, results suggest may be very useful for prevention peppers.