Rust of Sambucus williamsii and hyperparasite of the rust were found in Fengtong Zhai national nature sanctuary area. The pathogen was identified as Aecidium sambuci. The hyperparasite occured on lower leaf surface ru...Rust of Sambucus williamsii and hyperparasite of the rust were found in Fengtong Zhai national nature sanctuary area. The pathogen was identified as Aecidium sambuci. The hyperparasite occured on lower leaf surface rust spot. The characteristics of hyperparasitism was henna powdery. The hyperparasite live on aecium of A. sambucii and hinder the releasing of aeciospore. The hyperparasite was identified as Tuberculina sp.. This paper reported the symptom of the rust and the morphological characteristics of the rust pathogen. The hyperparasitism of A. sambuci and the morphological characteristics of the Tuberculina sp. were also reported.展开更多
Some Chaetomium spp. are capable of antagonizing several plant pathogenic fungi through production of antibiotics and mycoparasitism. Secretion of lytic enzymes, mainly including glucanases and chitinases, is consider...Some Chaetomium spp. are capable of antagonizing several plant pathogenic fungi through production of antibiotics and mycoparasitism. Secretion of lytic enzymes, mainly including glucanases and chitinases, is considered the most important step in the mycoparasitic process. In this study, an about 110kDa exo-β-1,3-glucanase from C. spirale ND35 was detected both in culture filtrate and directly on PAGE and IEF gels, as well as chitinases, although protease was not detectable on Litmus milk agar plates. Coiling and penetrating the hyphae of host fungus Valsa mali were observed by scanning electron microscope (SEM), which may be related to the synergistic interaction between β-1,3-glucanase and chitinases. β-1,3-glucanase activity of C. spirale ND35 varied considerably when C. spirale ND35 was grown in different carbon sources during various incubation time, and might be subjected to both induction by substrate and catabolite repression.展开更多
文摘Rust of Sambucus williamsii and hyperparasite of the rust were found in Fengtong Zhai national nature sanctuary area. The pathogen was identified as Aecidium sambuci. The hyperparasite occured on lower leaf surface rust spot. The characteristics of hyperparasitism was henna powdery. The hyperparasite live on aecium of A. sambucii and hinder the releasing of aeciospore. The hyperparasite was identified as Tuberculina sp.. This paper reported the symptom of the rust and the morphological characteristics of the rust pathogen. The hyperparasitism of A. sambuci and the morphological characteristics of the Tuberculina sp. were also reported.
文摘Some Chaetomium spp. are capable of antagonizing several plant pathogenic fungi through production of antibiotics and mycoparasitism. Secretion of lytic enzymes, mainly including glucanases and chitinases, is considered the most important step in the mycoparasitic process. In this study, an about 110kDa exo-β-1,3-glucanase from C. spirale ND35 was detected both in culture filtrate and directly on PAGE and IEF gels, as well as chitinases, although protease was not detectable on Litmus milk agar plates. Coiling and penetrating the hyphae of host fungus Valsa mali were observed by scanning electron microscope (SEM), which may be related to the synergistic interaction between β-1,3-glucanase and chitinases. β-1,3-glucanase activity of C. spirale ND35 varied considerably when C. spirale ND35 was grown in different carbon sources during various incubation time, and might be subjected to both induction by substrate and catabolite repression.
