Physiological Differences in Soybean Resistance to Pythium Root Rot
Pythium root rot is an important soil-born diseases,revealing the physiological differences of susceptible variety has important significance in resistant varieties breeding.Using physiological techniques to detected MDA,solutions of phenylalanine ammonia-lyase (PAL),peroxidase (POD),the change of soluble sugar and proline content in different resistance cultivars under Pythium infection in soybean hypocotyls.Research results showed that after Pythium infection,in resistant cultivars' hypocotyl and malondialdehyde content were not increased obviously in resistant cultivar,and soluble sugar contents were increased.Solution of phenylalanine ammonialyase activity,peroxidase activity,proline contents increased in different phase and significantly higher than these in the susceptible varieties.Susceptible variety after Pythium ultimum infested conditions,malondialdehyde content were high and soluble sugars would reduce in a given period.Solution of phenylalanine ammonialyase activity,peroxidase activity,and proline content were increased,but less than that in resistant varieties,indicated that resistant varieties had strong physiological and biochemical regulation.
国家科技期刊平台
NSTL
万方数据
维普
