AUTHOR=Romero-Contreras Yordan J. , Ramírez-Valdespino Claudia A. , Guzmán-Guzmán Paulina , Macías-Segoviano Juan Ignacio , Villagómez-Castro Julio César , Olmedo-Monfil Vianey 

TITLE=Tal6 From Trichoderma atroviride Is a LysM Effector Involved in Mycoparasitism and Plant Association

JOURNAL=Frontiers in Microbiology

VOLUME=10

YEAR=2019

URL=https://www.frontiersin.org/journals/microbiology/articles/10.3389/fmicb.2019.02231

DOI=10.3389/fmicb.2019.02231

ISSN=1664-302X

ABSTRACT=<p>LysM effectors play a relevant role during the plant colonization by successful phytopathogenic fungi, since they enable them to avoid either the triggering of plant defense mechanisms or their attack effects. Tal6, a LysM protein from <italic>Trichoderma atroviride</italic>, is capable of binding to complex chitin. However, until now its biological function is not completely known, particularly its participation in plant–<italic>Trichoderma</italic> interactions. We obtained <italic>T. atroviride Tal6</italic> null mutant and <italic>Tal6</italic> overexpressing strains and determined the role played by this protein during <italic>Trichoderma</italic>-plant interaction and mycoparasitism. LysM effector Tal6 from <italic>T. atroviride</italic> protects the hyphae from chitinases by binding to chitin of the fungal cell wall, increases the fungus mycoparasitic capacity, and modulates the activation of the plant defense system. These results show that beneficial fungi also employ LysM effectors to improve their association with plants.</p>