Mycobization with Glomus mosseae and Aspergillus niger in Lycopersicon esculentum plants

VELÁZQUEZ, M. S.; ELÍADES, L. A.; IRRAZABAL, G. B.; SAPARRAT, M. C. N.; CABELLO, M.

Journal of Agricultural Technology

Año: 2005 vol. 2 p. 315 - 326

The effect of mycobization with both an arbuscular mycorrhizal fungus, Glomus mosseae, and a phosphorus-solubilizing microorganism, Aspergillus niger, was evaluated on tomato plants grown on steamed perlite-vermiculite-sand substrate added either with or without rock phosphate in six greenhouse treatments. Plant aerial biomass, phosphorus concentration in plant tissue, and P available in the substrate were evaluated upon 60-day-old harvested plants. Mycorrhizal colonization was positive in all treatments inoculated with Glomus mosseae, although, lower infection values were found as P content in the substrate increased. A high phosphorus content was observed in plants from the treatments with added phosphoric rock; these levels were independent of the microbial inoculation. The highest values of aerial biomass and height of the plant were seen in the treatments co-inoculated with both microorganisms with or without phosphoric rock. This work confirms the synergic effects between mycorrhizal fungi and phosphorus solubilizing microorganisms. However, the results obtained cannot be extrapolated since each plant-soil-organism system deserves special analysis.