Composição diferencial das comunidades bacterianas na rizosfera de variedas de cana-de-açúcar

Costa, Diogo Paes da; Dias, Armando Cavalcante Franco; Durrer, Ademir; Andrade, Pedro Avelino Maia de; Gumiere, Thiago; Andreote, Fernando Dini

doi:10.1590/s0100-06832014000600004

Cited by 8 publications

(8 citation statements)

References 35 publications

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“…The bacterial classes Gammaproteobacteria and Betaproteobacteria comprised 65% of bacterial isolates (Table 1). The bacteria from this class responded to chemotactic factors of root exudates and were thus abundant in rhizospheric soils (Costa et al, 2014). However, the profile of exudates dif- fered according to genotype, phenological status, plant nutrition, and seasonality (Murphy et al, 2016).…”

Section: Phylummentioning

confidence: 99%

Diazotrophic bacteria isolated from Brachiaria spp.: genetic and physiological diversity

Oliveira

Silva

Diniz

et al. 2018

Ciencia e investigación agraria

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2018. Diazotrophic bacteria isolated from Brachiaria spp.: genetic and physiological diversity. Cien. Inv. Agr. 45(3): 277-289.Grass from the genus Brachiaria spp. predominates in pastures with low fertile soils. This scenario highlights the importance of the association with microorganisms to foster plant growth, which becomes essential to the successful establishment of this forage in such environments. This study aimed to evaluate the genetic variability and identify the mechanisms of plant growth promotion, in vitro, of bacteria associated with Brachiaria decumbens Stapf. and Brachiaria humidicola (Rendle.) Schweickerdt in Pernambuco, Brazil. We evaluated 20 isolates of diazotrophic bacteria obtained from the endophyte or rhizosphere communities. The genetic characteristics were determined via sequencing the 16S rRNA region, which allowed us to identify ten different bacterial genera: Bacillus sp., Burkholderia sp., Enterobacter sp., Klebsiella sp., Microbacterium sp., Pantoea sp., Ralstonia sp., Rhizobium sp., Sinomonas sp., and Sphingomonas sp., with a specificity of the genus Rhizobium sp. to Brachiaria decumbens Stapf.. The phenotypic and functional characteristics revealed that 100% of the bacterial strains produced indol-3-acetic acid (IAA) with the addition of L-tryptophan, and 60% presented IAA production independent of the L-tryptophan pathway. We also detected that 70% of the isolated bacteria possessed the capacity to solubilize phosphorus. The analysis of the enzymatic output revealed that 30% of the bacterial isolates produced cellulase, 60% produced pectate lyase, 15% produced polygalacturonase, and 30% produced amylase. We also detected the production of N-acyl homoserine lactones in 65% of bacterial strains. In summary, our results showed that plants of B. decumbens Stapf. and B. humidicola (Rendle.) Schweickerdt interacted with different bacterial genera capable of promoting plant growth.

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Section: Phylummentioning

confidence: 99%

Diazotrophic bacteria isolated from Brachiaria spp.: genetic and physiological diversity

Oliveira

Silva

Diniz

et al. 2018

Ciencia e investigación agraria

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“…In sugarcane, the studies have focused on varieties cultivated in Southeast region of the country and have found important bacterial groups that perform BNF (Rennie et al, 1982;Oliveira et al, 2002;Loiret et al, 2004;Perin et al, 2004;Reis et al, 2004;Luvizotto et al, 2010;Costa et al, 2014). Resende et al (2006) reported that biological N 2 fixation (BNF) performed by bacteria associated with sugarcane can be responsible for up to 60% of the total N accumulated in the plants.…”

Section: Introductionmentioning

confidence: 99%

Bacteria associated with sugarcane in Northeastern Brazil

Silva¹,

Freire²,

Kuklinsky-Sobral³

et al. 2016

Afr. J. Microbiol. Res.

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Sugarcane has a high demand in nitrogen, increasing costs and causing damages to the environment. It is necessary to find alternatives to reduce nitrogen fertilizers use. Diazotrophic bacteria have capacity to promote growth in grass with potential to fix N 2 and solubilize inorganic phosphate. This study aimed to evaluate bacterial community associated with different sugarcane varieties in Northeastern Brazil, select bacteria with plant growth-promoting characteristics, and identify endophytic and epiphytic bacterial lineages in sugarcane. Endophytic bacteria of leaves and roots and epiphytic bacteria of rhizoplane were isolated from three sugarcane commercial varieties and selected for their capacity to fix N 2 and solubilize inorganic phosphate. Bacterial strains from different morphological groups were isolated and a sample of 27 strains with potential for the simultaneous development of these characteristics were selected and identified. The bacterial community that interacted with sugarcane was more associated with rhizoplane and roots regions than with leaves, and had a high potential to fix N 2 and solubilize inorganic phosphate. Bacterial lineages were mainly from genera Pantoea sp. and Burkholderia sp., but there were also genera Enterobacter sp., Klebsiella sp. and Pseudomonas sp. and two lineages at the species level: Pantoea stewartii and Burkholderia cenocepacia.

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“…Em todos os sistemas foram inoculados 1l de suspensão bacteriana a absorbância de 0,2(OD 600nm ). Todas as curvas de multiplicação celular foram realizadas em quadruplicadas, com leituras em absorbância com comprimento de onda 600nm (ZHANG et al, 2014) Estes resultados deram suporte à caracterização de um grupo de 280 isolados por meio da técnica de BOX-PCR, como utilizado em outros estudos que buscam uma melhor caracterização de culturas bacterianas (HUNGRIA et al, 2008;WONG, 2009;MARQUES et al, 2008;SOARES JÚNIOR et al, 2013 (COSTA et al, 2014;DINI-ANDREOTE et al, 2010;MENDES et al, 2007).…”

Section: Efeito Dos Exsudatos Radiculares Sobre O Desenvolvimento Dasunclassified

“…Devido a isto, estudos relativos ao aprimoramento das condições de cultivo são de grande interesse, surgindo diversas fontes de estudos, dentre as quais está à busca por um melhor conhecimento sobre as comunidades microbianas associadas ao processo produtivo da cana-de-açúcar. Actinobacterias (COSTA et al, 2014;DINI-ANDREOTE et al, 2010;MENDES et al, 2007;PHILIPPOT et al, 2013;PISA et al, 2011).…”

Section: Introductionunclassified

Cultivo de bactérias da rizosfera da cana-de-açúcar e a interferência dos exsudatos da planta em seu desenvolvimento

Santos¹

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Composição diferencial das comunidades bacterianas na rizosfera de variedas de cana-de-açúcar

Cited by 8 publications

References 35 publications

Diazotrophic bacteria isolated from Brachiaria spp.: genetic and physiological diversity

Diazotrophic bacteria isolated from Brachiaria spp.: genetic and physiological diversity

Bacteria associated with sugarcane in Northeastern Brazil

Cultivo de bactérias da rizosfera da cana-de-açúcar e a interferência dos exsudatos da planta em seu desenvolvimento

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