Occurrence and diversity of arbuscular mycorrhizal fungi in trap cultures from soils under different land use systems in the Amazon, Brazil

Brazilian Journal of Microbiology

Patrícia Lopes Leal²  Sidney Luiz Stürmer¹  José Oswaldo Siqueira¹ 

[1] ,Universidade Federal de Viçosa Departamento de Microbiologia Viçosa MG ,Brasil

关键词: Amazon Forest;    soil fungi;    species diversity;    pot cultures;    pastures;    agroforestry systems;    Floresta Amazônica;    fungos do solo;    diversidade de espécies;    pastagens;    sistemas agroflorestais;    culturas em potes;   

DOI  :  10.1590/S1517-83822009000100019

来源: SciELO

【 摘 要 】

The aim of this work was to evaluate the occurrence of arbuscular mycorrhizal fungi (AMF) species diversity in soil samples from the Amazon region under distinct land use systems (Forest, Old Secondary Forest, Young Secondary Forest, Agroforestry systems, Crops and Pasture) using two distinct trap cultures. Traps established using Sorghum sudanense and Vigna unguiculata (at Universidade Regional de Blumenau - FURB) and Brachiaria decumbens and Neonotonia wightii (at Universidade Federal de Lavras - UFLA) were grown for 150 days in greenhouse conditions, when spore density and species identification were evaluated. A great variation on species richness was detected in several samples, regardless of the land use systems from where samples were obtained. A total number of 24 AMF species were recovered using both methods of trap cultures, with FURB';s traps yielding higher number of species. Acaulospora delicata, A. foveata, Entrophospora colombiana and two undescribed Glomus species were the most abundant and frequent species recovered from the traps. Number of species decreased in each genus according to this order: Acaulospora, Glomus, Entrophospora, Gigaspora, Archaeospora, Scutellospora and Paraglomus. Spore numbers were higher in Young Secondary Forest and Pastures. Our study demonstrated that AMF have a widespread occurrence in all land use systems in Amazon and they sporulate more abundantly in trap cultures from land uses under interference than in the pristine Forest ecosystem.

【 授权许可】

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