Phosphate solubilization, synthesis of Indol Acetic Acid and effect on biomass soybean inoculated with Pochonia/ Solubilização de Fosfato, síntese de Ácido Indol Acético e efeito na biomassa de soja inoculada com Pochonia

Aloísio Freitas Chagas Junior, Lillian França Borges Chagas, Albert Lennon Lima Martins, Rodrigo Silva de Oliveira, Lisandra Lima Luz, Brigitte Sthepani Orozco Colonia, Flavia Luane Gomes, Manuella Costa Souza

Abstract


 The fungus Pochonia has been highlighted for its potential as a biological control agent and is very promising as a growth promoter in plants. With this, it is possible to evaluate the phosphate solubilization capacity and the production of indole acetic acid (IAA), in vitro, as well as select strains with potential to promote vegetative growth in soybean crop by Pochonia fungus. For phosphate solubilization assay half-strength PD (Potato + dextrose) broth added with K2HPO4 and CaCl2 solution was used. For the IAA production assay, the isolates were transferred to erlenmeyer flasks with culture medium in the absence (control) and presence of L-tryptophan. All isolates were able to solubilize phosphate. For the production of IAA, the best results were higher in the presence of the L-tryptophan inducer, and the UFT-PO4 (12.3 μg mL-1) the best isolate. Shoot dry mass, root dry mass, total dry mass and plant height at 45 and 56 DAE (days after emergence) were evaluated in greenhouse conditions. Among the strains, the strain UFT-P05 and UFT-P03 has shown the highest relative efficiency of 77 and 75% respectively. The results of the present work prove the efficiency of the isolates of Pochonia spp. as a plant growth promoter.

 


Keywords


Fungus, Growth Promoter, Glycine Max (L.) Merr.

References


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DOI: https://doi.org/10.34117/bjdv7n7-458

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