Density and diversity of mycorrhizal propagules incultivated and contaminated soils under tropicalconditions

Olajire Fagbola; Ekpeno John Akpan; Adewumi Felicia Adelakin; Tajudeen Bamidele  Akinrinola; Kehinde Olayemi Affinnih

doi:10.30681/rcaa.v24i1.13972

Autores

OLAJIRE FAGBOLA UNIVERSITY OF IBADAN, IBADAN
Ekpeno John Akpan University of Ibadan, Ibadan
Adewumi Felicia Adelakin University of Ibadan, Ibadan
Tajudeen Bamidele Akinrinola UNIVERSITY OF IBADAN, IBADAN
Kehinde Olayemi Affinnih University of Ilorin, Ilorin, Nigeria

DOI:

https://doi.org/10.30681/rcaa.v24i1.13972

Palavras-chave:

fungos micorrízicos arbusculares, profundidades do solo, abundância relativa, densidade de esporos e diversidade

Resumo

As complexas relações entre fungos micorrízicos arbusculares (FMA) e ecossistemas destacam seu papel crítico na manutenção da saúde do solo e da produtividade das plantas, no entanto, fatores ambientais influenciam profundamente sua abundância e diversidade. Portanto, foi realizada uma pesquisa para conhecer a diversidade e densidade de FMA em três locais contrastantes. Este estudo investigou a densidade e diversidade de propágulos de FMA em solos cultivados e contaminados sob condições tropicais em duas estações, utilizando métodos de peneiração úmida e centrifugação por gradiente de densidade de sacarose, em uma pesquisa de três locais contrastantes e três profundidades de solo (0-15, 15-30 e 30-45 cm). Os resultados revelaram que o pH do solo variou de 4,79 a 6,52 entre os locais, influenciando as populações de FMA. A densidade de esporos foi maior na camada superficial do solo e diminuiu com a profundidade, exceto em florestas secundárias. As estações chuvosas apresentaram densidades de esporos mais altas do que as estações secas, com terras contaminadas exibindo a maior densidade.Isolamos 27 espécies de fungos micorrízicos arbusculares (FMA) de oito gêneros, com Glomus sendo o mais dominante (40% de abundância relativa), e distribuições variadas ao longo das estações (Septoglomus constrictum teve 12,79% de abundância relativa na estação chuvosa) e profundidades do solo (Acaulospora longula teve 9,13% e 19,85% de abundância relativa nas profundidades de 0-15 cm e 15-30 cm, respectivamente). A profundidade do solo, a concentração de carbono orgânico e o pH influenciaram significativamente a população de FMA, a abundância relativa e a distribuição. Nossos achados têm implicações para entender a ecologia dos FMA e para gerenciar ecossistemas de forma sustentável, destacando a importância de preservar a diversidade de FMA para manter a saúde do solo, a fertilidade e a sustentabilidade geral do ecossistema.

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Biografia do Autor

OLAJIRE FAGBOLA, UNIVERSITY OF IBADAN, IBADAN

Professor of Soil and Environmental Microbiology. Department of Agronomy, University of Ilorin, Ilorin, Kwara State, Nigeria; fagbola1111@gmail.com
Ekpeno John Akpan, University of Ibadan, Ibadan

Soil Resources Management, Post Graduate Student. Department of Soil Resources Management, University of Ibadan, Ibadan, Nigeria
Adewumi Felicia Adelakin, University of Ibadan, Ibadan

Post graduate student. Department of Soil Resources Management, University of Ibadan, Ibadan, Nigeria
Tajudeen Bamidele Akinrinola, UNIVERSITY OF IBADAN, IBADAN

Senior Lecturer. Department of Crop and Horticultural Sciences, University of Ibadan, Ibadan, Nigeria
Kehinde Olayemi Affinnih, University of Ilorin, Ilorin, Nigeria

Lecturer, Associate Professor. Department of Agronomy, University of Ilorin, Ilorin, Kwara State, Nigeria

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