Diversity of arbuscular mycorrhizal fungi in Alnus acuminata Kunth woodlands in the Yungas, Argentina

BECERRA, A., M. CABELLO & N. BARTOLONI

MYCOLOGIA.

ALLEN PRESS INC

Año: 2010

0027-5514

The arbuscular mycorrhizal fungal (AMF) communities from the Yungas forests of Argentina were studied. The AMF species present in the rhizosphere of some dominant native plants (one tree: Alnus acuminata; three herbaceous species: Duchesnea indica, Oxalis conorrhiza, Trifolium aff. repens; and one shrub: Sambucus peruviana) from two sites (Quebrada del Portugués and Narváez Range) of the Yungas forests were isolated, identified and quantified during the four seasons of the year. Twenty-two AMF morpho-taxa were found. Spore density of some AMF species at each site varied among seasons. The genera that most contributed to the biodiversity index were Acaulospora for Quebrada del Portugués and Glomus for Narváez Range. High diversity values were observed in the Yungas forests, particularly in the spring (rainy season). In conclusion, AMF differed in species composition and seasonal sporulation dynamics in the Yungas forests.