Arbuscular mycorrhizal fungi associated with the rhizosphere of an endemic terrestrial bromeliad and a grass in the Brazilian neotropical dry forest

Autor(es)

Silva, Antonio Marcos Miranda ; Feiler, Henrique Petry ; Lacerda-Junior, Gileno Vieira ; Fernandes-Junior, Paulo Ivan ; Aidar, Saulo de Tarso ; de Araujo, Victor Araujo Vieira Prudencio ; Matteoli, Filipe Pereira ; Pereira, Arthur Prudencio de Araujo ; de Melo, Itamar Soares ; Cardoso, Elke Jurandy Bran Nogueira

• Tipo de documento: Artigo Científico
• Fonte: Brazilian Journal of Microbiology; v. N/A, p. 13-pg., 2023-07-06.

Resumo

Arbuscular mycorrhizal fungi form symbiotic associations with 80-90% of all known plants, allowing the fungi to acquire plant-synthesized carbon, and confer an increased capacity for nutrient uptake by plants, improving tolerance to abiotic and biotic stresses. We aimed at characterizing the mycorrhizal community in the rhizosphere of Neoglaziovia variegata (so-called `caroa`) and Tripogonella spicata (so-called resurrection plant), using high-throughput sequencing of the partial 18S rRNA gene. Both plants are currently undergoing a bioprospecting program to find microbes with the potential of helping plants tolerate water stress. Sampling was carried out in the Caatinga biome, a neotropical dry forest, located in northeastern Brazil. Illumina MiSeq sequencing of 37 rhizosphere samples (19 for N. variegata and 18 for T. spicata) revealed a distinct mycorrhizal community between the studied plants. According to alpha diversity analyses, T. spicata showed the highest richness and diversity based on the Observed ASVs and the Shannon index, respectively. On the other hand, N. variegata showed higher modularity of the mycorrhizal network compared to T. spicata. The four most abundant genera found (higher than 10%) were Glomus, Gigaspora, Acaulospora, and Scutellospora, with Glomus being the most abundant in both plants. Nonetheless, Gigaspora, Diversispora, and Ambispora were found only in the rhizosphere of N. variegata, whilst Scutellospora, Paraglomus, and Archaeospora were exclusive to the rhizosphere of T. spicata. Therefore, the community of arbuscular mycorrhizal fungi of the rhizosphere of each plant encompasses a unique composition, structure and modularity, which can differentially assist them in the hostile environment. (AU)

• Processo FAPESP: 19/13436-8 - Mitigação do estresse hídrico em milho (Zea mays L.) mediante a inoculação de fungos micorrízicos arbusculares e rizobactérias promotoras de crescimento
• Beneficiário: Antonio Marcos Miranda Silva
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 19/27682-0 - Relações entre sistemas de cultivo e microrganismos do solo: efeitos na microbiota e promotores do desenvolvimento vegetal
• Beneficiário: Filipe Pereira Matteoli
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 16/18944-3 - Mudanças climáticas e eficiência energética na agricultura: um enfoque em estresse hídrico, manejo orgânico e biologia do solo
• Beneficiário: Elke Jurandy Bran Nogueira Cardoso
• Modalidade de apoio: Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Temático
• Processo FAPESP: 17/24785-8 - O papel da microbiota do solo na atenuação do estresse hídrico das plantas
• Beneficiário: Gileno Vieira Lacerda Júnior
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado