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This study aims to evaluate the phosphate solubilization potential of the Trichoderma spp. isolates found in the commercial product Trichoplus JCO. The strains were isolated, molecularly identified and grown in vitro. The soluble phosphate concentration was quantified at 3, 6, 9 and 12 days after transplanting. Rice was inoculated with the Trichoderma strains in greenhouse conditions with 10 to 60 x10 8 conidia per gram of rice and then planted. At 30 and 45 days after planting (DAP), plant growth characteristics were determined. The phosphate concentrations of most of the Trichoderma strains showed a general trend of increasing from days 3 to 9. At 30 DAP, Tr. Harz and Tr. TSM had a higher significant difference. At 45 DAP, the rice inoculated with Tr. Harz, Tr. Euc and Tr. TSM had the greatest increase in the total dry matter compared with the control. The rice inoculated with Tr. Euc and Tr. TSM had the best relative efficiencies, and the rice inoculated with Tr. Din and Tr. TSM demonstrated the highest P-UEF. Finally, the rice inoculated with Tr. Harz (T. asperelloides), Tr. Euc (T. harzianum) and Tr. TSM (T. harzianum) had the highest efficiency in phosphate solubilization with increases in rice biomass.

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The present study aimed to evaluate the Trichoderma asperellum inoculation efficiency in agronomic performance of soybean plants under field conditions. Two experiments were conducted in a savanna higher, respectively, when compared to the treatment with no inoculation.

Filamentous fungi of the genus Trichoderma are known for their activity as plant growth promoters. The objective of this work was to evaluate the efficiency of the Trichoderma asperellum UFT 201 strain as a plant growth promoter in soybean. The ability of phosphate solubilization, indole acetic acid synthesis and the effect on soybean plant growth under greenhouse conditions were evaluated in four experiments. In vitro and in vivo analyzes were performed. Plant biomass characteristics such as shoot dry mass (SDM), root dry mass (RDM) and total dry mass (TDM) were evaluated. T. asperellum UFT 201 showed a significantly higher concentration (p <0.05) with a phosphate solubilization capacity of 67.8% higher than the positive control treatment (Trichoderma harzianum). The production of indole acetic acid (IAA) by T. asperellum UFT 201 was 26.7% higher than the positive control. The effect on the biomass treated by T. asperellum UFT 201 was higher (p <0.05) than the positive and absolute controls. Thus, inoculation by T. asperellum UFT 201 showed high efficiency as a growth promoter in soybean.