A paralog of the proteinaceous elicitor SM1 is involved in colonization of maize roots by Trichoderma Wrens

作者：Crutcher Frankie K; Moran Diez Maria E; Ding Shengli; Liu Jinggao; Horwitz Benjamin A; Mukherjee Prasun K; Kenerley Charles M^*

来源：Fungal Biology, 2015, 119(6): 476-486.

DOI：10.1016/j.funbio.2015.01.004

• Cerato-platanin
• Biocontrol
• Induced systemic resistance
• Root colonization

The biocontrol agent, Trichoderma uirens, has the ability to protect plants from pathogens by eliciting plant defense responses, involvement in mycoparasitism, or secreting antagonistic secondary metabolites. SM1, an elicitor of induced systemic resistance (ISR), was found to have three paralogs within the T. uirens genome. The paralog sm2 is highly expressed in the presence of plant roots. Gene deletion mutants of sm2 were generated and the mutants were found to overproduce SM1. The ability to elicit ISR in maize against Colletotrichum graminicola was not compromised for the mutants compared to that of wild type isolate. However, the deletion strains had a significantly lowered ability to colonize maize roots. This appears to be the first report on the involvement of an effector-like protein in colonization of roots by Trichoderma.

• 出版日期2015-6