Screening of rhizobacteria isolated from maize (Zea mays L.) in Rio Grande do Sul State (South Brazil) and analysis of their potential to improve plant growth

Arruda, Letícia; Beneduzi, Anelise; Martins, Adriana Ferreira; Lisboa, Bruno Brito; Lopes, Cristiane; Bertolo, Fernanda de Oliveira de Andrade; Passaglia, Luciane Maria Pereira; Vargas, Luciano Kayser

doi:10.1016/j.apsoil.2012.09.001

Cited by 116 publications

(75 citation statements)

References 55 publications

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“…da Silva et al 1913 At Rio Grande do Sul state, corn roots and rhizospheric soil were found in association with 21 genera of rhizobacteria, with Klebsiella and Burkholderia the dominant genera (Arruda et al, 2013). This result is in contrast with the present study, where Bacillus and Enterobacter were found to be the dominant genera of rhizospheric bacteria and Enterobacter was found to be the dominant genus of endophytic bacteria.…”

Section: Discussioncontrasting

confidence: 79%

Isolation and genetic characterization of endophytic and rhizospheric microorganisms from Butia purpurascens Glassman

Silva¹,

Senabio²,

Pinheiro³

et al. 2015

Afr. J. Microbiol. Res.

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Interactions between plants and microorganism are complex and can affect the establishment of plant communities and change ecosystem properties. These interactions are of interest for researchers and have many ecological and biotechnological applications. The present study is the first report on the microbial diversity associated with Butia purpurascens Glassman, and the goal was to isolate and identify the genetic diversity of endophytic and rhizospheric growable microorganisms from B. purpurascens using molecular biology techniques. Endophytic and rhizospheric microorganisms were isolated from the roots and rhizospheric soil of the purple yatay palm. DNA was extracted, and the 16S region for bacteria and internal transcribed spacer (ITS) region for fungi were amplified and sequenced. The resulting sequences were compared with known sequences from GenBank by similarity search using BLASTn. The rhizosphere and roots of B. purpurascens harbor a diverse set of microorganism groups. Fourteen (14) genera of endophytic and 12 genera of rhizospheric bacteria were identified that belonged to three phyla (Proteobacteria, Firmicutes and Actinobacteria), and 11 endophytic and six rhizospheric genera of fungi were identified that belonged to the phylum Ascomycota. The most frequent isolated genera were Enterobacter and Pseudomonas for endophytic bacteria, Gibberella and Codinaeopsis for endophytic fungi, Bacillus and Enterobacter for rhizospheric bacteria, and Ceratocystis for rhizospheric fungi. Differences were observed between the endophytic and rhizospheric microbial communities of B. purpurascens, with some microorganisms only detected in one environment. Further studies with a higher number of individuals are required to confirm these results.

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Section: Discussioncontrasting

confidence: 79%

Isolation and genetic characterization of endophytic and rhizospheric microorganisms from Butia purpurascens Glassman

Silva¹,

Senabio²,

Pinheiro³

et al. 2015

Afr. J. Microbiol. Res.

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“…isolates improved plant growth, with the best results obtained under the insoluble P condition. The favorable effects of PGPB inoculation on plant growth have also been extensively reported in others works (Beneduzi et al 2008;Sasaki et al 2010;Santi Ferrara et al 2011;Ambrosini et al 2012;Glick 2012;Arruda et al 2013;Souza et al 2013). Plant growth-promoting bacteria can affect host plants directly or indirectly.…”

Section: Efficiency Of Growth Promotion By Bacterial Inoculation Of Bsupporting

confidence: 54%

Screening of plant growth promoting bacteria associated with barley plants (Hordeum vulgare L.) cultivated in South Brazil

Pontes

Souza

Granada³

et al. 2015

Biota Neotrop.

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The occurrence of associations between bacteria and plant roots may be beneficial, neutral or detrimental. Plant growth promoting (PGP) bacteria form a heterogeneous group of beneficial microorganisms that can be found in the rhizosphere, the root surfaces or in association with host plant. The aim of this study was to isolate and characterize PGP bacteria associated to barley plants (Hordeum vulgare L.) aiming a future application as agricultural inoculant. One hundred and sixty bacterial strains were isolated from roots or rhizospheric soil of barley based on their growth in nitrogen-free selective media. They were evaluated for their ability to produce indolic compounds (ICs) and siderophores, and to solubilize tricalcium phosphate in in vitro assays. Most of them (74%) were able to synthesize ICs in the presence of the precursor L-tryptophan, while 57% of the isolates produced siderophores in Fe-limited liquid medium, and 17% were able to solubilize tricalcium phosphate.

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“…Adesina et al (2007) also reported that a high proportion (83 %) of bacterial isolates antagonistic to Fusarium oxysporum were siderophore positive, while Arruda et al (2013), in a study of bacterial promoters of maize growth, also noted that a large proportion of siderophore producing isolates were Burkholderia.…”

Section: Siderophore Productionmentioning

confidence: 99%

Soil Fungistasis Against Fusarium Graminearum Under Different Crop Management Systems

Lisboa

Bayer

Passaglia

et al. 2015

Rev. Bras. Ciênc. Solo

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Soil management, in terms of tillage and cropping systems, strongly influences the biological properties of soil involved in the suppression of plant diseases. Fungistasis mediated by soil microbiota is an important component of disease-suppressive soils. We evaluated the influence of different management systems on fungistasis against Fusarium graminearum, the relationship of fungistasis to the bacterial profile of the soil, and the possible mechanisms involved in this process. Samples were taken from a long-term experiment set up in a Paleudult soil under conventional tillage or no-tillage management and three cropping systems: black oat (Avena strigose L.) + vetch (Vicia sativa L.)/maize (Zea mays L.) + cowpea (Vigna sinensis L.), black oat/maize, and vetch/maize. Soil fungistasis was evaluated in terms of reduction of radial growth of F. graminearum, and bacterial diversity was assessed using ribosomal intergenic spacer analysis (RISA). A total of 120 bacterial isolates were obtained and evaluated for antibiosis, and production of volatile compounds and siderophores. No-tillage soil samples showed the highest level of F. graminearum fungistasis by sharply reducing the development of this pathogen. Of the cropping systems tested, the vetch + black oat/maize + cowpea system showed the highest fungistasis and the oat/maize system showed the lowest. The management system also affected the genetic profile of the bacteria isolated, with the systems from fungistatic soils showing greater similarity. Although there was no clear relationship between soil management and the characteristics of the bacterial isolates, we may conclude that antibiosis and the production of siderophores were the main mechanisms accounting for fungistasis.

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Screening of rhizobacteria isolated from maize (Zea mays L.) in Rio Grande do Sul State (South Brazil) and analysis of their potential to improve plant growth

Cited by 116 publications

References 55 publications

Isolation and genetic characterization of endophytic and rhizospheric microorganisms from Butia purpurascens Glassman

Isolation and genetic characterization of endophytic and rhizospheric microorganisms from Butia purpurascens Glassman

Screening of plant growth promoting bacteria associated with barley plants (Hordeum vulgare L.) cultivated in South Brazil

Soil Fungistasis Against Fusarium Graminearum Under Different Crop Management Systems

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