Background:

Currently, the technology for the production of mycorrhizal biofertilizers has experienced a notable boost. However, it is necessary to improve the quality of the biofertilizers by selecting efficient mycorrhizal species that benefit the crops.

Objective:

Identify the diversity of arbuscular mycorrhizal fungi (AMF) of two soils of San Luis Potosí and its response in the growth of Sorghum vulgare y Zea mays.

Methods:

Two types of soils (wet and semiarid), and Sorghum vulgare y Zea mays trap plants were used. Growth, mycorrhizal behavior and the CO2 flux of the substrate were evaluated.

Results and conclusions:

Eleven mycorrhizal fungal species belonging to three families of the Phyllum Glomeromycota were identified. The Glomeraceae family was the most abundant followed by the Acaulosporaceae and the Claroi-deo-glomeraceae. The crops increased their aerial biomass in the semi-arid substrate and the root biomass in the wet substrate. The highest CO2 flow rate was found in the semi-arid substrate. The number of spores was greatest in the semi-arid substrate and the percentage and efficiency of colonization was greatest in the Zea mays of the semi-arid substrate. The greatest diversity of AMF was replicated in the Sorghum vulgare trap culture.

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