Preliminary comparison and physiological response of 7 varieties of creeping bentgrass against brown spot disease
In order to screen the resistant varieties of creeping bentgrass,the physiological indexes of 7 varieties of creeping bentgrass infected by Rhizoctonia solani were determined and their disease resistance was compared by principal component analysis.The results showed that after being invaded by pathogens,the content of chlorophyll,soluble protein(SP),and hydrogen peroxide(H2O2)in plant leaves decreased;the content of malondialdehyde(MDA),soluble sugar(SS),free proline(Pro),superoxide dismutase(SOD),catalase(CAT),peroxidase(POD),and glutathione reductase(APX)increased.the score D value was calculated following conversion of these 10 physiological indicators into 4 principal component factors,The highest score D went to factor was'Guangmang'.The disease resistance level of 7 varieties of creeping bentgrass was ranked as Guangmang＞A-1＞007＞A4＞Sun Rise＞Xuanyan＞Jiamei by principal component analysis.The results laid the foundation for the subsequent research on the resistance mechanism of creeping bentgrass and the breeding of new resistant varieties.
万方数据
维普
