Elucidation of interactions between beneficial microorganisms and plants and its mechanism(s) involved in defense system in plant

研究了丛枝菌根真菌Glomus mosseae与PGPF Phoma sp.菌株GS 8 -2、GS 8 -3、Penicillium simplicissimum GP 17 -2和Trichoderma harzianum GT 3 -2之间的相互作用及其定殖、促生和抑病作用。菌根定殖G. mosseae在黄瓜根中的作用增强。而茎点霉GS 8 -2、GS 8 -3和简单茎点霉GP 17 -2则无此作用。G.藓类植物对PGPF建立的影响因PGPF种类组合的不同而不同。虽然，茎点霉菌株的定殖强烈抑制G。mosseae、T.哈茨木受到轻微影响。相比之下，无论是根还是根际定居的P. simplicissimum被G mosseae改变。茎点霉菌株促进生长和诱导系统抗性的能力也受到G. mosseae，而P. simplicissimum或T.哈茨木不受影响。相反，T.哈茨木霉对植物生长的促进作用与G.苔藓。将简形拟单孢霉和T. harzianum与G mosseae组合对根际病原菌R. solani，但对叶片病原菌C.圆形的

This study investigated the interactions between AMF Glomus mosseae and PGPF Phoma sp. isolates GS8-2, GS8-3, Penicillium simplicissimum GP17-2 or Trichoderma harzianum GT3-2 for their colonization, plant growth promotion and disease suppression. Mycorrhizal colonization by G. mosseae in cucumber roots was enhanced by T. harzianum GT3-2, while Phoma sp. GS8-2, GS8-3 and P. simplicissimum GP17-2 had no effect. The effects of G. mosseae on the establishment of PGPF differ with the different PGPF species combined. Although, the colonization of Phoma sp. isolates was strongly suppressed by G. mosseae, T. harzianum was slightly affected. In contrast, neither the root nor rhizosphere colonization of P. simplicissimum was altered by G mosseae. The ability of Phoma sp. isolates to promote growth and induce systemic resistance was also adversely affected by G. mosseae, however, the same beneficial effects of P. simplicissimum or T. harzianum was not affected. Instead, the ability of T. harzianum to promote plant growth was synergistically enhanced by the presence of G. mosseae. Combined inoculation of P. simplicissimum or T. harzianum with G mosseae resulted in better suppression of the root pathogen R. solani, though such an effect was not observed on the leaf pathogen C. orbiculare.