Trichoderma's Metabolomic Journey: Unveiling Bioactive Secondary Metabolites for Sustainable Solutions for...

The Trichoderma genus, a prolific producer of bioactive secondary metabolites (SM) serves as a promising alternative to chemical treatments for biological disease control. Phytopathogenic fungi and pests significantly reduce global crop yields, with synthetic pesticides posing severe ecological risks; thus, sustainable alternatives like Trichoderma are gaining prominence for crop protection and growth enhancement. Additionally, Trichoderma SM, hold immense potential for drug development, offering promising solutions against multidrug-resistant pathogens in human, veterinary medicine and other biotechnological sectors. SMs could be discovered through biochemical (production and structure elucidation), molecular (for exploring natural product diversity at genomic level) as well as computational approaches (understanding Biosynthetic Gene Cluster). The biosynthesis of SMs is closely regulated by BGCs, with proteins like LaeA1, TOR1, and Tmk3 playing critical roles. Transcription factors such as THCTF1, THMTF1, and the Tag1 gene further modulate SM production, either positively or negatively.The synthesis of these metabolites is intricately linked to biosynthetic gene clusters, providing avenues for understanding and modulating their expression for potential applications.These SMs, spanning anthraquinones, simple pyrones, peptaibols, sesquiterpenes, alkaloids, and non-ribosomal peptides (NRPs), displaying multifaceted bioactivities such as antibacterial, anticancer, antioxidant, anti-inflammatory, antifungal, antimalarial, and nematocidal properties. Noteworthy, SMs like longibrachins, 6-pentyl-α-pyrone, butyrolactone produced by Trichoderma, demonstrate significant antibacterial, antifungal, antitumor, antiviral as well as insecticidal properties towards various pathogens. A list of various SMs from Trichoderma strains with identified structures and various potent bioactivities are mentioned along with their chemical SMILES in this review. This article seeks to investigate potent bioactive metabolites, methods for their discovery; challenges faced upon direct usage of Trichoderma formulations and acknowledges the pivotal role of bioactive metabolites in not only enhancing agroecosystems but also promoting the overall health and well-being of various organisms.