Presence Of Gigaspora Rosea In Rizosphere Of Pasture In Bothriochloa Pertusa (L) A. Camus

Abstract

The objective of this study was to isolate the diversity of arbuscular mycorrhizae associated with colosoana grass (Bothriochloa pertusa(L) A. Camus) from cattle farms in the municipalities of Corozal and Tolú, Department of Sucre, Colombia. The number of spores/100 g soil was determined. From the isolated morphotypes we proceeded to the identification of AM species, using taxonomic keys. The results of the analysis of variance for spore density/100 g soil showed a highly significant difference between the number of spores present in the soil. The number of spores/100 g soil and the percentage of root infection found on the cattle farms ranged from (900) 2600 - 4000 (7300) and (30) 41 - 65 (76) respectively. Thirty-one native morphotypes of arbuscular mycorrhizal fungi were isolated, distributed in two genera Glomus and Gigaspora, with Glomus species predominating.  These soil microorganisms are an alternative for sustainable pasture recovery and production.