Abstract

ORDONEZ-CASTANEDA, YULI-MARCELA,; CEBALLOS-ROJAS, ISABEL-CRISTINA,; RODRIGUEZ-VILLATE, ALIA,  and  SANDERS, IAN R.,. Effect of inoculation with Rhizophagus irregularis and phosphate fertilization on the arbuscular mycorrhizal fungi local community. Rev.Bio.Agro [online]. 2021, vol.19, n.2, pp.184-200.  Epub June 30, 2021. ISSN 1692-3561.  https://doi.org/10.18684/bsaa.v19.n2.2021.1850.

Arbuscular Mycorrhizal Fungi (AMF) are important microorganisms in agricultural soils because of their positive effect on plant acquisition of phosphorus (P); one of the fundamental nutrients for plants. Available P in the soils of the Colombian Orinoquía are low, so phosphate fertilization is necessary in crops such as cassava. The objective of this work was to study the effect of phosphate fertilization and inoculation with Rhizophagus irregularis (the model AMF species), on the resident AMF communities. The AMF diversity was described by morphological and molecular techniques from the spores present in the rhizosphere of cassava plants maintained under traditional agronomic conditions. The richness and diversity of the AMF communities were affected by the experimental treatments AMF inoculation and P fertilization. Changes in abundance were detected in the genera Glomus and Acaulospora. This was significantly influenced by inoculation and phosphate fertilization. The findings of this study suggest that the use of phosphate fertilizer and the application of R. irregularis in agricultural processes affect the biodiversity of native AMF communities in soils of the Colombian Orinoquía. Further research is required to understand the relationship between AMF community composition and host plant response.

Keywords : Arbuscular Mycorrhizal Fungi (AMF); Rhizophagus irregularis; Diversity; Manihot esculenta; Phosphorus Fertilization; Inoculation; AMF Communities; Sustainable Agriculture; Biofertilizers; Spores.

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