Physalis peruviana L. response to inoculation with phosphorus solubilizing bacteria

Abstract

The implementation of solubilizing bacteria (BSF) as biological inoculants has become a promising alternative to provide phosphate nutritional need in tropical soils, reducing the use of chemical fertilizers. The objective was to evaluate 12 phosphate solubilizing strains (P04), isolated from the rhizosphere of Physalis peruviana L. on promoting growth of this crop. Pseudomonas sp. UVAG42, Bacillus sp. UVAG45, UVLO26 and UVLO22 were the strains producing more growth promotion under greenhouse conditions using 50% tricalcium phosphate (FT) with respect to an absolute control and 100% FT. These four strains were evaluated solubilization capacity of P04, with different carbon sources associated with root exudates, and production of kinds. The results showed that all four strains have the ability to solubilize PO4, where best results (p< 0.05) were obtained in the presence of malic acid, and producing indoles. Correlation analysis between all variables showed an association between them (p> 0.05) does not exist, demonstrating that possibly promoting growth was brought to a defined integration of various capacities for plant growth promoting bacteria (PGPR). Our findings show that phosphorus solubilization process based on the use of sources of low solubilization as FT, accompanied by BSF may be a viable farming alternative Physalis peruviana L., reducing the economic, ecological and social costs of this crop of great economic importance to the country as an export product.