Comunidades microbianas, atividade enzimática e fungos micorrízicos em solo rizosférico de "Landfarming" de resíduos petroquímicos

Nakatani, André Shigueyoshi; Siqueira, José Oswaldo; Soares, Cláudio Roberto Fonsêca Sousa; Lambais, Márcio Rodrigues

doi:10.1590/s0100-06832008000400014

Cited by 5 publications

(7 citation statements)

References 48 publications

(28 reference statements)

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“…and Bacillus spp. in the rhizosphere because it is known that the roots of plants can exudate many compounds in the form of amino acids, organic acids, and sugars that are used as energy sources and nutrients for the growth and activity of microorganisms in the rhizosphere (Nakatani et al 2008;Kavino et al, 2010;Marroni and Germani, 2011).…”

Section: Rhizobacteriamentioning

confidence: 99%

“…However, in addition to environmental conditioning of the soil, it is important to note that plants exert a decisive influence on the number and diversity of microbes due to the zone of influence of roots because the application of wastewater will stimulate root development, increase the activity of microorganisms, and modify their community in the rhizosphere (Herman et al, 2006;Nakatani et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

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Interaction between Thermotolerant Coliforms and Rhizobacteria in Soil Fertilized with Treated Domestic Wastewater

Neto

Fortes

Silva

et al. 2017

Rev. Bras. Ciênc. Solo

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Studies on the survival of pathogenic microorganisms in the soil after use of wastewater for fertilization of agricultural crops report the effects of moisture, pH, organic matter, and soil temperature on microorganisms. There are few studies that assess the survival of these microorganisms in the rhizosphere of plants fertilized with wastewater. Thus, the aim of this study was to quantify the number of fecal coliforms and rhizobacteria (fluorescent Pseudomonas spp., Bacillus spp,) in the rhizosphere of winter and summer crops fertilized with wastewater. In the experiment, we used 20 plots, and each plot occupied an area of 200 m². The treatments used in the winter crop consisted of uncultivated plots and single crops of wheat, triticale, black bean, and intercropped black bean/wheat. In the summer season, we used uncultivated plots and single crops of corn, sunflower, bean, and intercropped bean/corn. The experiment was conducted in a randomized block design with five treatments and four replications. Soil samples from the rhizosphere for microbiological analyses were collected at the flowering stage of the crops at a depth of 0.00-0.20 m. Plants stimulated fluorescent Pseudomonas spp. and Bacillus spp. in the rhizosphere, with average scores of 7.9 and 6.9 log CFU g -1 of dry soil, respectively, whereas in bare soil, these scores were 6.7 and 5.8 log CFU g -1 of dry soil for these rhizobacteria groups. However, this stimulating effect was not seen for fecal coliforms, which had an average score of 31.7 × 10 3 MPN g -1 of dry soil in the uncultivated area and 20.0 × 10 3 MPN g -1 of dry soil in crop areas. Overall, the numbers of rhizobacteria colonies in the rhizosphere soil under intercropping were higher than those observed in the rhizosphere soils of single winter and summer crops. Therefore, the presence of plants enhances the development of rhizobacteria and changes the balance among the species of microorganisms in the soil microbial community fertilized with wastewater.

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Section: Rhizobacteriamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Interaction between Thermotolerant Coliforms and Rhizobacteria in Soil Fertilized with Treated Domestic Wastewater

Neto

Fortes

Silva

et al. 2017

Rev. Bras. Ciênc. Solo

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“…Os FMAs além de serem considerados promotores de crescimento também vêm sendo utilizados na recuperação de áreas degradadas [11,12], na descontaminação de solos com metais pesados [13,14] e no controle de fitopatógenos pela indução de resistência a patógenos [15]. Entretanto, apesar de ter inúmeras aplicações, poucos são os trabalhos que enfatizam a produção de propágulos micorrízicos.…”

Section: Introductionunclassified

Produção de propágulos micorrízicos em sorgo e/ou em braquiária

Lopes

Santos

et al. 2018

Sci. Plena

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Os fungos micorrízicos arbusculares (FMA) são micro-organismos endofíticos capazes de promover o crescimento de plantas de interesse econômico a depender da interação microbiana com a planta, mas poucos são os trabalhos relacionados com a produção de inoculantes. O objetivo deste trabalho foi avaliar a produção de propágulos micorrízicos em cultivo sucessivo e/ou rotacionado em sorgo e em braquiária, sem o uso de estimuladores químicos. O delineamento experimental utilizado foi inteiramente ao acaso em parcelas subdivididas, cujas parcelas foram os tratamentos (três isolados de FMAs: UFLA351 - Rhizoglomus clarum, UFLA372 - Claroideoglomus etunicatum e UFLA401 - Acaulospora morrowiae) e as subparcelas os cultivos sucessivos em sorgo/braquiária e rotacional em braquiária, com quatro repetições. O cultivo sucessivo em sorgo ou em braquiária estimula a produção de esporos micorrízicos de R. clarum, C. etunicatum e A. morrowiae. A rotação de cultura sorgo-braquiária não garante incremento na esporulação, a depender do isolado micorrízico. A produção de vesículas e de arbúsculos depende da interação do fungo com a espécie de planta e não apenas da estação do ano. As vesículas podem aumentar a produção de esporos micorrízicos, a depender da interação FMA x planta e da época do ano.

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“…Thus, the microbial communities can be either induced or suppressed by hydrocarbon pollutants, while the microbial community profiles and their activities are remarkably changed and affected by the contaminants in the soil. The microbial activities, the functions and the communities thus change in order to adapt to the pollution [12][13][14].…”

mentioning

confidence: 99%

Effects of Abiotic Factors on Microbial Characteristics of Petroleum Contaminated Soils in Northern China

Zhang¹,

Hu²,

Jia³

2016

JRST

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ABSTRACT:In this study, the microbial community and the physico-chemical properties of soil samples from seven oil-fields in the north of China were analyzed using multiple methods. The study's purpose was to analyze the influence of abiotic factors on the microbial activity and the biotic community. By using the Ultrasonic-Soxhle extraction method of hydrocarbon in oil composition were analyzed, and column chromatography combined with GC-MS was used to analyze the contaminant composition. The results showed that the highest oil concentrations in the soil reached 97.3 g/kg dry soil, which amounts to about 500-1,000 times higher than the background in uncontaminated soil. Moreover, the average nutrient content of contaminated soils was lower than the unpolluted controls. The total bacterial load in the soil was measured using the most probable number (MPN) method and the microbial activity was determined by fluorescein diacetate (FDA) activity. The results showed that soil contaminated with oil seriously affects and limits the microbial populations and their activities. The water content of the soil was the key limiting factor of the microbial populations and the FDA activity. With a water content of 6%, oil content below 15%, and a pH of 7.5-8.0, the conditions supported the highest levels of microbial growth and activity. Microbial populations were 10-100 times and the FDA activity was 2-5 times lower in samples originating from the arid Northwest of China compared to samples from Northwest China. In the northwestern region the microbial diversity was 3 times higher. The microbial communities were limited and suppressed whereby the local environment, the temperature, the water content and the oil content were the key factors that induced the biodiversity of the soil contaminated with oil in different analyses of the geography and the climate environment.

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Comunidades microbianas, atividade enzimática e fungos micorrízicos em solo rizosférico de "Landfarming" de resíduos petroquímicos

Cited by 5 publications

References 48 publications

Interaction between Thermotolerant Coliforms and Rhizobacteria in Soil Fertilized with Treated Domestic Wastewater

Interaction between Thermotolerant Coliforms and Rhizobacteria in Soil Fertilized with Treated Domestic Wastewater

Produção de propágulos micorrízicos em sorgo e/ou em braquiária

Effects of Abiotic Factors on Microbial Characteristics of Petroleum Contaminated Soils in Northern China

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