Effect Of Silicon On The Resistance Of Two Fungus In Turfgrass Seashore Paspalum

With the developing of the lawn industry, lawn developments scale, plant to grow the area to extend continuously, severe lawn diseases occur increasingly. The lawn was harmed by disease only next to fruit tree, vegetable and a handful of cash crop. And the people use the disinfectant to prevent or cure according to the occurrence and the infecting regulation of the disease, the common disinfectant contains thiophanate-methyl, carbendazim, chlorothalonil. And the application of the dissolubility silicon is a development that plant anti- disease studies provide a new way of thinking.The disease index and incidence of a disease, activities of catalase (CAT), perioxidase (POD), superoxide dismutase (SOD) and phenylalanine ammonia alyase (PAL) of seashore paspulum were studied with the treatments of different sources of silicon and inoculation with Curvularia lunata (wakker) Boed and Rhizoctonia solani under substrate culture. The results were:1. The disease index of silicon application after inoculation of Curvularia lunata (wakker) Boed were significantly lower than CK, and the disease index of organic silicon was the lowest (15.97%) and its control effect was 61.23%. The disease index of inorganic silicon after inoculation of (Rhizoctonia solani) was the lowest 5% and its control effect was 51.21%. Thus showed that silicon application could enhance the resistance of seashore paspulum to Curvularia lunata (wakker) Boed and Rhizoctonia solani, and delay the accidence of the pathogen especially the treatments withpotassium silica acid and nanosilicon.2.The activities of CAT, POD, SOD increased after silicon application while inoculated with Rhizoctonia solani and Curvularia lunata (wakker) Boed.While silicate failed to significantly enhance PAL activity. The activities of CAT, POD and SOD were the highest at treatment of potassium silica acid, while the acticity of PAL was less with nanosilicon application and potassium silica acid when Curvularia lunata (wakker) Boed was inoculated. The activities of CAT and SOD were the highest at treatment of potassium silica acid, while the acticity of POD was highest with organic siliocn application when Rhizoctonia solani was inoculated, while the acticity of PAL was less with potassium silica acid and nanosilicon application when Rhizoctonia solani was inoculated.The results indicated that the responses of different enzymes varied to different pathogens and silicon could enhance the resistance of seashore paspulum to Rhizoctonia solani and Curvularia lunata (wakker) Boed via regulating the biochemical and physiological processes relating to pathogen resistance.