蛋白质激发子SM1的一个旁系同源物参与了绿色木霉对玉米根的定殖过程。
A paralog of the proteinaceous elicitor SM1 is involved in colonization of maize roots by Trichoderma virens.
作者信息
Crutcher Frankie K, Moran-Diez Maria E, Ding Shengli, Liu Jinggao, Horwitz Benjamin A, Mukherjee Prasun K, Kenerley Charles M
机构信息
Department of Plant Pathology and Microbiology, Texas A&M University, College Station, TX 77843, USA; Southern Plains Agricultural Research Center, USDA, Agricultural Research Service, 2765 F and B Road, College Station, TX 77845, USA.
Department of Plant Pathology and Microbiology, Texas A&M University, College Station, TX 77843, USA; Bioprotection Research Centre, Lincoln University, PO Box 84, Lincoln 7647 Canterbury, New Zealand.
出版信息
Fungal Biol. 2015 Jun;119(6):476-86. doi: 10.1016/j.funbio.2015.01.004. Epub 2015 Feb 14.
The biocontrol agent, Trichoderma virens, 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. virens 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.
生防菌哈茨木霉（Trichoderma virens）能够通过引发植物防御反应、参与菌寄生或分泌拮抗性次生代谢产物来保护植物免受病原体侵害。诱导系统抗性（ISR）激发子SM1在哈茨木霉基因组中存在三个旁系同源基因。旁系同源基因sm2在植物根系存在时高表达。构建了sm2的基因缺失突变体，发现这些突变体过量产生SM1。与野生型菌株相比，这些突变体在诱导玉米对禾谷炭疽菌（Colletotrichum graminicola）产生ISR方面的能力并未受损。然而，缺失菌株在定殖于玉米根系方面的能力显著降低。这似乎是关于类效应蛋白参与木霉根系定殖的首篇报道。
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