Hyphal cell wall crude elicitor(CWE)of rice blast pathogen could induce hypersensitive response in tobacco and induce other nonhost plants to be resistant to other fungal pathogens.When corn was treated with CWE,they ...Hyphal cell wall crude elicitor(CWE)of rice blast pathogen could induce hypersensitive response in tobacco and induce other nonhost plants to be resistant to other fungal pathogens.When corn was treated with CWE,they inhibited the infection of Exserohilum turcicum and Curvularia lunata,and when plants of capsicum and cucumber were treated with CWE,they inhibited the infection of Colletotrichum gloeospori-oides.CWE solution showed no bioactivity on spore germination and hyphal growth of the experiment fungi in vitro.Nonhost resistance induced by CWE to other fungal pathogens was not complete resistance.The induced resistant effect(IRE)increased as CWE concentration increased,however,IRE had somehow satura-ted concentration of CWE.Induced nonhost resistance by incompatible pathogen was quantitative to other compatible pathogens.The induced resistance was best at 2 or 3 d after CWE treatment,and then decreased.IRE was about 20 percent in 10 d after CWE treatment.展开更多
Changes of benzoic acid,phenylacetic acid and salicylic acid contents in stem of 3-4 year old Pinus thunbergii inoculated with Bursaphelenchus xylophilus were studied by HPLC.The results showed that after nematode inf...Changes of benzoic acid,phenylacetic acid and salicylic acid contents in stem of 3-4 year old Pinus thunbergii inoculated with Bursaphelenchus xylophilus were studied by HPLC.The results showed that after nematode infection,contents of benzoic acid and salicylic acid in the stem of Pinus thunbergii increased gradually and then decreased when serious disease occurred,while content of phenylacetic acid increased at early stage and decreased at later stage of the disease.The role of benzoic acid,phenylacetic acid and salicylic acid during the development of the disease was discussed.展开更多
文摘Hyphal cell wall crude elicitor(CWE)of rice blast pathogen could induce hypersensitive response in tobacco and induce other nonhost plants to be resistant to other fungal pathogens.When corn was treated with CWE,they inhibited the infection of Exserohilum turcicum and Curvularia lunata,and when plants of capsicum and cucumber were treated with CWE,they inhibited the infection of Colletotrichum gloeospori-oides.CWE solution showed no bioactivity on spore germination and hyphal growth of the experiment fungi in vitro.Nonhost resistance induced by CWE to other fungal pathogens was not complete resistance.The induced resistant effect(IRE)increased as CWE concentration increased,however,IRE had somehow satura-ted concentration of CWE.Induced nonhost resistance by incompatible pathogen was quantitative to other compatible pathogens.The induced resistance was best at 2 or 3 d after CWE treatment,and then decreased.IRE was about 20 percent in 10 d after CWE treatment.
文摘Changes of benzoic acid,phenylacetic acid and salicylic acid contents in stem of 3-4 year old Pinus thunbergii inoculated with Bursaphelenchus xylophilus were studied by HPLC.The results showed that after nematode infection,contents of benzoic acid and salicylic acid in the stem of Pinus thunbergii increased gradually and then decreased when serious disease occurred,while content of phenylacetic acid increased at early stage and decreased at later stage of the disease.The role of benzoic acid,phenylacetic acid and salicylic acid during the development of the disease was discussed.
