Estrutura metabólica e genética de comunidades bacterianas em solo de cerrado sob diferentes manejos

Souza, Leandro Moraes de; Schlemmer, F.; Alencar, Priscila Martins; Lopes, André Alves de Castro; Passos, Samuel Ribeiro; Xavier, Gustavo Ribeiro; Fernandes, Marcelo Ferreira; Mendes, I. C.; Reis, Fábio Bueno dos

doi:10.1590/s0100-204x2012000200016

Cited by 7 publications

(5 citation statements)

References 29 publications

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“…Variations in microbial diversity, as observed in fungal communities and bacteria in the present study, may be associated with such factors as the plant species and the soil characteristics. This suggests the pursuit of equilibrium after modification of environmental conditions (Souza et al, 2012). There were variations in the structure of the bacterial communities in the soil, as observed by the authors of other studies accessing bacterial communities with primers for 16S rDNA and 18S rDNA (Nakatani et al, 2011).…”

Section: Dgge Analysis Dendrograms and Dna Sequencingmentioning

confidence: 52%

Effects of phosphate-solubilizing bacteria, native microorganisms, and rock dust on Jatropha curcas L. growth

2016

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Microorganisms with the ability to release nutrients to the soil from insoluble sources may be useful for plant cultivation. We evaluated the growth-promoting effect on Jatropha curcas L. of phosphate-solubilizing bacteria (PSB) and the native microbiota in soil with or without rock dust. J. curcas L. is important for biodiesel production. The experiments were performed in a greenhouse under a random-statistical design with 14 replicates. The soil received increasing dosages of rock dust. The presence of resident microorganisms and PSB inoculum was correlated with plant height, biomass production, and phosphorus content in plants for 120 days. Native soil microorganisms were detected and identified using denaturing gradient gel electrophoresis and DNA sequence analysis. Several bacterial populations belonged to the genus Bacillus. Populations associated with the phyla Chytridiomycota and Ascomycota were detected among the fungi. The best results for the variable plant height were correlated with the presence of resident microbiota and rock dust until the end of the experiment. The largest biomass production and the highest content of phosphorus occurred in the presence of soil-resident microbiota only up to 120 days. No significant effects were observed for biomass production with the use of PSB combined with rock dust. J. curcas L. under the influence of only resident microbiota showed the best plant growth results. Future research will focus on the specificity of resident microbiota activity in plant growth promotion and the isolation of these microorganisms to produce a new inoculum to be tested in various plants.

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Section: Dgge Analysis Dendrograms and Dna Sequencingmentioning

confidence: 52%

Effects of phosphate-solubilizing bacteria, native microorganisms, and rock dust on Jatropha curcas L. growth

2016

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“…In the WPC sampling, the similarity was 85% for treatment 60 m 3 ha -1 yr -1 continuous and 60 m 3 ha -1 yr -1 interrupted and 93% for 30 m 3 ha -1 yr -1 continuous and 30 m 3 ha -1 yr -1 interrupted, and of these in relation to the control, the similarity was 59% (Figure 2). Despite the fact that the soil did not receive PS for 12 mo, there was a high similarity between continuous and interrupted applications within rates, this is because the C and nutrients source used by the microorganisms was the same; therefore, stimulating the microorganisms equally because there is no diversity of substrates and according to the study developed by Souza et al (2012) the soil bacterial communities structure is affected by cover vegetation due to the release of specific forms of C representing energy sources. C: Control, 0 m 3 ha -1 yr -1 ; 30IN: 30 m 3 ha -1 yr -1 rate with interrupted application; 30CO: 30 m 3 ha -1 yr -1 rate with continuous application; 60IN: 60 m 3 ha -1 yr -1 rate with interrupted application; 60CO: 60 m 3 ha -1 yr -1 rate with continuous application.…”

Section: Microbiological Attributesmentioning

confidence: 99%

Soil attributes and microbial diversity on 28 years of continuous and interrupted for 12 months of pig slurry application

Navroski

Filho

Barbosa

et al. 2021

Chil. j. agric. res.

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The pig slurry (PS) application as an organic fertilizer in Brazilian soils occurs for many years and the effects of this application are known, but in this study our objective was to evaluate the microbiological attributes and microbial diversity of the soil after the interruption of the PS application. The PS rates were 0, 30 and 60 m 3 ha-1 yr-1 and in 2016 the plots were divided and the PS application was stopped in half of the plot, generating the factorial scheme 2 × 2, being two PS rates (30 and 60 m 3 ha-1 yr-1) and two application conditions (continuous or interrupted). Two soil samples were taken at 5 and 12 mo after interruption. The PS interruption reduced the microbial biomass C (MBC) by 5% and 14% after 5 and 12 mo, respectively. Microbial biomass N (MBN) was reduced too by 32% and 29% due to the PS interruption. The soil basal respiration (SBR) decreased when PS application was interrupted. The metabolic quotient (qCO2) did not change with the PS interruption but was high in the 60 m 3 ha-1 yr-1. The bacteria and archaea genetic profiles showed similarity above 69% between continuous and interrupted applications. The bacterial diversity and richness index were higher than those found for fungal and archaeal communities. In contrast, the interruption had a strong effect on the soil fungi, which had diversity reduced due to the increase of the species dominance. The PS interruption up to 12 mo has an effect on the biomass, diversity, and activity of the microorganisms.

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“…Essas enzimas são sensivelmente modificadas por alterações desses atributos do solo e isso pode ser reflexo do tipo de manejo, da qualidade e da quantidade do C disponível (Chodak & Nikliñska 2010). No entanto, as relações entre a atividade microbiana do solo e a dos atributos químicos, como C e N do solo, com a serapilheira foi influenciada pela diversidade vegetal (Souza et al, 2012). Nesse caso, a utilização de espécies que proporcionem menor relação C/N pode auxiliar na maior atividade microbiana do solo e maximizar a ciclagem de nutrientes.…”

Section: Solounclassified

Nitrogênio, carbono e compactação do solo como fatores limitantes do processo de recuperação de matas ciliares

Vasconcellos¹,

Bini²,

Paula

et al. 2013

Rev. Bras. Ciênc. Solo

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A recuperação de áreas de floresta, principalmente de matas ciliares, tornou-se fator-chave para a adequação ambiental da agricultura, com o propósito de proteger os recursos hídricos e a biota. Entretanto, o cultivo agrícola tradicional, além de ter alterado a ciclagem de nutrientes com a perda de matéria orgânica, biomassa e atividade microbiana, causou também a compactação do solo, o que influencia a posterior implantação de reflorestamentos. O objetivo deste trabalho foi identificar quais atributos do solo (físicos, químicos e microbiológicos) mais influenciam o teor de C, N, P e umidade da serapilheira em áreas de mata ciliar com diferentes idades de recuperação (20, 10 e cinco anos), em comparação com uma área nativa (NT). A partir da ANOVA e dos testes de médias (Duncan) e correlação (Pearson), foram verificados quais atributos acompanham o tempo de recuperação e qual a relação entre eles. A análise multivariada de partição da inércia a partir da análise de redundância (pRDA) foi feita a fim de identificar quais atributos do solo foram mais importantes para discriminar entre as áreas, com base nos teores de C, N, P e umidade da serapilheira encontrados nessas áreas. Maior relação C/N da serapilheira foi encontrada nas áreas de 20 (26,8) e de cinco (29,9) anos. Entre os atributos microbiológicos avaliados, observou-se que a respiração basal do solo (C-CO2), o carbono da biomassa microbiana (CBM) e a atividade das enzimas desidrogenase e urease foram diretamente proporcionais ao aumento da idade das áreas. O C e N totais do solo, o N-NO3, o nitrogênio da biomassa microbiana (NBM), a atividade das enzimas desidrogenase e urease, bem como a macroporosidade correlacionaram-se positivamente e a microporosidade, negativamente, com o C e N da serapilheira. A partir da pRDA, o NBM e o carbono total do solo foram os atributos mais importantes para explicar o teor de N e C da serapilheira; a explicação compartilhada foi mais da metade de toda a explicação observada ou 28,2 %. A melhoria das condições físicas do solo e a adição de matéria orgânica que resultam na formação de uma serapilheira mais rica em N pode ser uma forma de melhorar as condições microbiológicas e químicas do solo e de acelerar o processo de recuperação.

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Estrutura metabólica e genética de comunidades bacterianas em solo de cerrado sob diferentes manejos

Cited by 7 publications

References 29 publications

Effects of phosphate-solubilizing bacteria, native microorganisms, and rock dust on Jatropha curcas L. growth

Effects of phosphate-solubilizing bacteria, native microorganisms, and rock dust on Jatropha curcas L. growth

Soil attributes and microbial diversity on 28 years of continuous and interrupted for 12 months of pig slurry application

Nitrogênio, carbono e compactação do solo como fatores limitantes do processo de recuperação de matas ciliares

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