摘要
欧美杨溃疡病是国内广泛栽种的欧美杨(Populus×euramericana)品种上新发现的病害,其中分离到的Lonsdalea quercina和Fusarium solani在室内外接种,均可在欧美杨上产生症状,但L.quercina引起的症状更为典型,F.solani在致病过程中所起的作用尚不明确。为了明确欧美杨溃疡病发生过程中2种微生物的关系,通过拮抗试验、接种试验和野外调查,并将所得数据用SPSS软件分析。结果表明,L.quercina和F.solani两者间不具有拮抗关系,L.quercina和F.solani混合接种与L.quercina、F.solani单独接种时所形成病斑的相关系数分别在0.9和0.8以上,L.quercina与病害发生相关性更高,起主要致病作用;F.solani在溃疡病发生中后期出现较多,致病力较低,常常伴随L.quercina发生,扮演着加重病害发生的角色。
Poplar canker disease is newly discovered disease which occurred on the domestic widely planted varieties of Populus × euramericana, both the bacterium Lonsdalea quercina and the fungus Fusarium solani isolated from the poplar induced the symptom on cultivar of P.×euramericana when conducting inoculation in field and in greenhouse, but more typical symptoms induced when inoculated with L. quercina. The role of F. solani playing in occurrence of P.×euramericana canker disease is unclear. In order to clarify the relationship between the two kinds of micro-organisms in the process of P. × euramericana canker disease, dual culture, inoculation experiment and field investigations were conducted, and the resulting data were analyzed by using SPSS software. The results indicated that： antagonistic relations did not exist between L. quercina and F. solani, and the pearson correlation coefficient that the lesion induced by mixed inoculated with L. quercina and F. solani, and by inoculation separately with the two, were 0.9 and 0.8 respectively. The higher correlation coefficient for the disease occurrence suggested that L. quercina played the major pathogenic role. F. solani with lower virulence usually appeared in late stage of poplar canker disease, played an aggravating role for occurrence of poplar canker disease.
出处
《中国农学通报》
CSCD
2013年第19期21-25,共5页
Chinese Agricultural Science Bulletin
基金
林业公益性行业专项"欧美杨溃疡病发病规律及其综合防治研究"(201104054)
