The role of species turnover in structuring bacterial communities in a local scale in the cactus rhizosphere

Autor(es)

Kavamura, Vanessa Nessner ^[1] ; Taketani, Rodrigo Gouvea ^[1] ; Ferreira, Clederson ^[1] ; de Melo, Itamar Soares ^[1] ; Mendes, Rodrigo ^[1]

Afiliação do(s) autor(es)

^[1] Embrapa Meio Ambiente, Rodovia SP-340 Km 127, 5, Jaguariuna, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: PLANT AND SOIL; v. 425, n. 1-2, p. 101-112, APR 2018.
• Citações Web of Science: 1

Resumo

Background and aims Cereus jamacaru is a native cactus in the semiarid biome caatinga able to withstand long periods of drought. Here, we studied the rhizosphere microbiome of this cactus to understand how precipitation affects the assembly of bacterial communities from the taxonomical and functional perspectives. Methods We selected three C. jamacaru plants in the caatinga biome, sampled the rhizosphere soil from the same plants during rainy and dry seasons and performed shotgun sequencing from total DNA isolated from rhizosphere using Ion Torrent technology. Results Acidobacteria, Actinobacteria and Proteobacteria showed increase in relative abundance during the rainy season when compared to dry season. Five major functional groups were significantly different, including differences in amino acids and derivatives, carbohydrates, protein metabolism, respiration, and RNA metabolism. Taxonomically, the assembly of bacterial communities follows a neutral model. Conclusions The assembly of bacterial communities in the rhizosphere of C. jamacaru is affected by precipitation resulting in different taxonomical and functional community patterns during dry and rainy seasons. We attribute these differences on rhizosphere communities composition to dispersal limitation of microorganisms caused by low pore connectivity due to low water content in the soil, which leads to spatially isolate communities during the dry season. (AU)

• Processo FAPESP: 13/23470-2 - Metagenômica e metatranscriptômica da comunidade microbiana envolvida na transformação do carbono orgânico em sedimentos de manguezais do Estado de São Paulo
• Beneficiário: Rodrigo Gouvêa Taketani
• Modalidade de apoio: Bolsas no Brasil - Jovens Pesquisadores
• Processo FAPESP: 10/50799-7 - Microrganismos envolvidos na ciclagem de nitrogenio na rizosfera de plantas nativas da caatinga.
• Beneficiário: Rodrigo Gouvêa Taketani
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 14/16041-0 - Efeitos dos exudatos radiculares de trigo no microbioma da rizosfera e sua correlação com a produtividade
• Beneficiário: Vanessa Nessner Kavamura Noguchi
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado
• Processo FAPESP: 11/15760-5 - Dinâmica do microbioma da rizosfera de mandacaru na Caatinga
• Beneficiário: Clederson Ferreira
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 13/08144-1 - Metagenômica da rizosfera de triticum aestivum l. obtida em solos supressivos à brusone de trigo causada por magnaporthe grisea
• Beneficiário: Vanessa Nessner Kavamura Noguchi
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado