Project description:This SuperSeries is composed of the following subset Series: GSE19832: Trichoderma virens transcript levels during mycoparasitism GSE23382: Trichoderma atroviride transcript levels during mycoparasitism GSE23410: Trichoderma reesei transcript levels during mycoparasitism Refer to individual Series
Project description:Plant-beneficial fungi from the genus Trichoderma (Hypocreales, Ascomycota) can control oomyceteous plant-pathogenic Pythium myriotylum (Peronosporales, Oomycota) and thus serve as bioeffectors for the eco-friendly products of crop protection. However, the underlying mechanisms of microbe-microbe interactions have yet to be fully understood. In this study, we focused on the role of the Trichoderma secretome induced by P. myriotylum mycelia. For this purpose, we selected strains showing strong (T. asperellum, T. atroviride, T. virens), moderate (T. cf. guizhouense, T. reesei), and weak (T. parepimyces) activities, respectively, and cultured with the sterilized P. myriotylum mycelia. Secreted proteins were analyzed using label-free LC-MS/MS, bioinformatic localization prediction, gene ontology (GO) annotation, and ortholog analysis. The exoproteomic analysis quantified proteins in the six Trichoderma spp., suggesting unequal antagonistic mechanisms among the strong and weak strains, respectively, with different proportions of putative cellulases, proteases, redox enzymes, and extracellular proteins of unknown function. Notably, proteolysis-related proteins were abundant, while the abundant proteases tended not to be conserved across the species (i.e., non-orthologous). Putative cellobiohydrolases were detected abundantly in all Trichoderma species except for the weak antagonist T. parepimyces, even though its genome encodes for these proteins. Notably, secretomes of the most potent anti-Pythium bioeffectors tended to have higher endo-cellulase activity. Cellulose and other glucans are major components of the oomycete cell wall, which was partly reflected in the cellulases produced by the Trichoderma species. The varying abundances of orthologous proteins suggested the evolution of differing transcription regulation mechanisms across the Trichoderma genus in response to the ubiquitous presence of Oomycota.
Project description:We report the application of RNA sequencing technology for transcriptome profiling of Trichoderma asperellum challenged with Organophosphorus Pesticide Dichlorvos. Based on RNA-seq analysis, in T. asperellum TJ01 treated with 100 μg/mL, 500 μg/mL, and 1000 μg/mL dichlorvos, 204, 490, and 872 genes were significantly upregulated, respectively, while 37, 177, and 383 genes were significantly downregulated, respectively. This study provides a framework for the application of transcriptome profiling towards characterization of trichoderma under stress of Organophosphorus Pesticide.
Project description:Trichoderma erinaceum secretome The use of lignocellulosic biomass is something that has been encouraged considering the search for sustainable alternatives mainly in the energy sector. However, to use such biomass as feedstock, its degradation is necessary aiming the formation of sugars that could be used in fermentation. For this conversion, enzymatic cocktails with degradative capacity are used, which are normally composed for the of filamentous fungi secretomes. The present work presents the characterization of Trichoderma erinaceum aiming at its use as a producer of lignocellulolytic enzymes. Cultivations were conducted using Mandels-Andreotti media enriched with four different carbon sources (glucose, avicel, pretreated sugarcane straw, or energy cane bagasse) in different time points (72h, 96h, 120h, 144h), and the supernatants were analyzed by mass spectrometry to determine the various patterns of enzyme secretion resulting from the modification of components within the media.
Project description:Trichoderma harzianum T34 is a fungal strain able to promote the plant growth and to increase plant defense responses. Trichoderma harzianum transformants expressing the amdS gene, encoding an acetamidase, of Aspergillus nidulans produce a higher plant development than the wild type T34. We used microarrays to analyze the physiological and biochemical changes in tomato plants produced as consequence of interaction with Trichoderma harzianum T34 and amdS transformants