What does the published scientific research say about Trichoderma velutinum?

What does the research say about Trichoderma velutinum as a biocontrol agent? Two bean (Phaseolus vulgaris) studies report antagonism against Rhizoctonia solani: an untargeted metabolomics study found 36 significantly shifted metabolites in the bean plant metabolome during T. velutinum interaction, while a qPCR study identified upregulation of the defense-related genes WRKY33, CH5b, and hGS. A sugar beet colonization study found a T. velutinum G1/8 strain colonized both the root surface and endorhiza, confirming rhizosphere competence alongside plant growth promotion.

A germination and growth-promotion characterization study from Saudi Arabia reported 84.1% seed germination for T. velutinum-treated seeds, ranking it among the growth-promoting isolates evaluated on tomato — though below T. lixii and T. harzianum isolates in that trial. Volatile organic compound research found T. velutinum emits a species-specific VOC profile at lower compound diversity than T. harzianum under the same experimental conditions.