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浙江大学学报（农业与生命科学版）
浙江大学学报(农业与生命科学版)  2004, Vol. 30 Issue (4): 448-448    
论文     
G protein signalling involved in host recognition and mycoparasitismrelated chitinase expression in Trichoderma atroviride
Susanne Zeilinger　 Barbara Reithner　 Kurt Brunner　 Valeria Scala　 Isabel Peiβl　 Matteo Lorito　 Robert L Mach　
Susanne Zeilinger（Vienna University of Technology, Institute of Chemical Engineering, Group Molecular Biochemistry of Fungi,Getreidemarkt 9, 1060 Wien, Austria. University of Naples, Dep. Ar. Bo. Pa. Ve. Plamt Pathology, Via Universita 100, Portici 80055, Italy）　　　　　　 Barbara Reithner（Vienna University of Technology, Institute of Chemical Engineering, Group Molecular Biochemistry of Fungi,Getreidemarkt 9, 1060 Wien, Austria. University of Naples, Dep. Ar. Bo. Pa. Ve. Plamt Pathology, Via Universita 100, Portici 80055, Italy）　　　　　　 Kurt Brunner（Vienna University of Technology, Institute of Chemical Engineering, Group Molecular Biochemistry of Fungi,Getreidemarkt 9, 1060 Wien, Austria. University of Naples, Dep. Ar. Bo. Pa. Ve. Plamt Pathology, Via Universita 100, Portici 80055, Italy）　　　　　　 Valeria Scala（Vienna University of Technology, Institute of Chemical Engineering, Group Molecular Biochemistry of Fungi,Getreidemarkt 9, 1060 Wien, Austria. University of Naples, Dep. Ar. Bo. Pa. Ve. Plamt Pathology, Via Universita 100, Portici 80055, Italy）　　　　　　 Isabel Peiβl（Vienna University of Technology, Institute of Chemical Engineering, Group Molecular Biochemistry of Fungi,Getreidemarkt 9, 1060 Wien, Austria. University of Naples, Dep. Ar. Bo. Pa. Ve. Plamt Pathology, Via Universita 100, Portici 80055, Italy）　　　　　　 Matteo Lorito（Vienna University of Technology, Institute of Chemical Engineering, Group Molecular Biochemistry of Fungi,Getreidemarkt 9, 1060 Wien, Austria. University of Naples, Dep. Ar. Bo. Pa. Ve. Plamt Pathology, Via Universita 100, Portici 80055, Italy）　　　　　　 Robert L Mach（Vienna University of Technology, Institute of Chemical Engineering, Group Molecular Biochemistry of Fungi,Getreidemarkt 9, 1060 Wien, Austria. University of Naples, Dep. Ar. Bo. Pa. Ve. Plamt Pathology, Via Universita 100, Portici 80055, Italy）　
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Abstract: Mycoparasitic species of Trichoderma are commercially applied as biological control agents against various fungal pathogens. The mycoparasitic interaction is host specific and includes recognition,attack and subsequent penetration and killing of the host. Investigations on the underlying events revealed that Trichoderma responds to multiple signals from the host (e. g. lectins or other ligands such as low molecular weight components released from the host's cell wall) and host attack is accompanied by morphological changes and the secretion of hydrolytic enzymes and antibiotics.Degradation of the cell wall of the host fungus is-besides glucanases and proteases-mainly achieved by chitinases. In vivo studies showed that the ech42 gene (encoding endochitinase 42) is expressed before physical contact of Trichoderma with its host, probably representing one of the earliest events in mycoparasitism, whereas Nag1 (N-acetylglucosaminidase) plays a key role in the general induction of the chitinolytic enzyme system of T. atroviride . 　　Investigations on the responsible signal transduction pathways of T. atroviride led to the isolation of several genes encoding key components of the cAMP and MAP kinase signaling pathways, as alpha and β subunits of heterotrimeric G proteins, the regulatory subunit of cAMP-dependent protein kinase,adenylate cyclase, and three MAP kinases. Analysis of knockout mutants, generated by Agrobacterium-mediated transformation, revealed that at least two alpha-subunits of heterotrimeric G proteins are participating in mycoparasitism-related signal transduction. The Tga1 G alpha subunit was shown to be involved in mycoparasitism-related processes such as chitinase expression and overproduction of toxic secondary metabolites, whereas Tga3 was found to be completely avirulent showing defects in chitinase formation and host recognition.……
出版日期: 2004-07-12
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引用本文:

Susanne Zeilinger　 Barbara Reithner　 Kurt Brunner　 Valeria Scala　 Isabel Peiβl　. G protein signalling involved in host recognition and mycoparasitismrelated chitinase expression in Trichoderma atroviride [J]. 浙江大学学报(农业与生命科学版), 2004, 30(4): 448-448.

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https://www.zjujournals.com/agr/CN/Y2004/V30/I4/448

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