Bacterial diversity in rice-field water in Rio Grande do Sul

Reche, Maria Helena Lima Ribeiro; Fiúza, Lidia Mariana

doi:10.1590/s1517-83822005000300009

Cited by 15 publications

(10 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…P. mirabilis , P. vulgaris , and P. penneri strains, in addition to other members of Enterobacteriaceae , were recognized as bacteria connected with an anthropic influence, indicating the fecal contamination of rice field water from irrigation channels and rice field plots in Rio Grande do Sul, Brazil [122]. …”

Section: Proteus As An Indicator Of Fecal Pollutionmentioning

confidence: 99%

Significance and Roles of Proteus spp. Bacteria in Natural Environments

2016

View full text Add to dashboard Cite

Proteus spp. bacteria were first described in 1885 by Gustav Hauser, who had revealed their feature of intensive swarming growth. Currently, the genus is divided into Proteus mirabilis, Proteus vulgaris, Proteus penneri, Proteus hauseri, and three unnamed genomospecies 4, 5, and 6 and consists of 80 O-antigenic serogroups. The bacteria are known to be human opportunistic pathogens, isolated from urine, wounds, and other clinical sources. It is postulated that intestines are a reservoir of these proteolytic organisms. Many wild and domestic animals may be hosts of Proteus spp. bacteria, which are commonly known to play a role of parasites or commensals. However, interesting examples of their symbiotic relationships with higher organisms have also been described. Proteus spp. bacteria present in soil or water habitats are often regarded as indicators of fecal pollution, posing a threat of poisoning when the contaminated water or seafood is consumed. The health risk may also be connected with drug-resistant strains sourcing from intestines. Positive aspects of the bacteria presence in water and soil are connected with exceptional features displayed by autochthonic Proteus spp. strains detected in these environments. These rods acquire various metabolic abilities allowing their adaptation to different environmental conditions, such as high concentrations of heavy metals or toxic substances, which may be exploited as sources of energy and nutrition by the bacteria. The Proteus spp. abilities to tolerate or utilize polluting compounds as well as promote plant growth provide a possibility of employing these microorganisms in bioremediation and environmental protection.

show abstract

Section: Proteus As An Indicator Of Fecal Pollutionmentioning

confidence: 99%

Significance and Roles of Proteus spp. Bacteria in Natural Environments

2016

View full text Add to dashboard Cite

show abstract

“…The pioneer works on tobacco rhizosphere microorganisms were concentrated on the isolation and identification of various rhizosphere microbes mainly using traditional physiological and biochemical methods (10,18). Recently, amplified ribosomal DNA restriction analysis (ARDRA) technique has been successfully used for bacterial diversity analysis in a great variety of environments, including soil and tobacco rhizosphere (4).…”

Section: Introductionmentioning

confidence: 99%

Genetic diversity of siderophore-producing bacteria of tobacco rhizosphere

Tian¹,

Ding²,

Zhu³

et al. 2009

Braz. J. Microbiol.

103

View full text Add to dashboard Cite

The genetic diversity of siderophore-producing bacteria of tobacco rhizosphere was studied by amplified ribosomal DNA restriction analysis (ARDRA), 16S rRNA sequence homology and phylogenetics analysis methods. Studies demonstrated that 85% of the total 354 isolates produced siderophores in iron limited liquid medium. A total of 28 ARDRA patterns were identified among the 299 siderophore-producing bacterial isolates. The 28 ARDRA patterns represented bacteria of 14 different genera belonging to six bacterial divisions, namely β-, γ-, α-Proteobacteria, Sphingobacteria, Bacilli, and Actinobacteria. Especially, γ-Proteobacteria consisting of Pseudomonas, Enterobacter, Serratia, Pantoea, Erwinia and Stenotrophomonas genus encountered 18 different ARDRA groups. Results also showed a greater siderophore-producing bacterial diversity than previous researches. For example, Sphingobacterium (isolates G-2-21-1 and G-2-27-2), Pseudomonas poae (isolate G-2-1-1), Enterobacter endosymbiont (isolates G-2-10-2 and N-5-10), Delftia acidovorans (isolate G-1-15), and Achromobacter xylosoxidans (isolates N-46-11HH and N-5-20) were reported to be able to produce siderophores under low-iron conditions for the first time. Gram-negative isolates were more frequently encountered, with more than 95% total frequency. For Gram-positive bacteria, the Bacillus and Rhodococcus were the only two genera, with 1.7% total frequency. Furthermore, the Pseudomonas and Enterobacter were dominant in this environment, with 44.5% and 24.7% total frequency, respectively. It was also found that 75 percent of the isolates that had the high percentages of siderophore units (% between 40 and 60) belonged to Pseudomonas. Pseudomonas sp. G-229-21 screened out in this study may have potential to apply to low-iron soil to prevent plant soil-borne fungal pathogen diseases.

show abstract

“…A presença de bactérias heterotróficas Gram positivas e Gram negativas, em águas de orizicultura, foi registrada por Reche & Fiuza (2005), em 5 regiões do Rio Grande do Sul (RS), conforme mostra a Figura 1. Entre as bactérias melhor adaptadas à vida no solo ou na água estão aquelas, pertencentes ao gênero Bacillus, cujas espécies têm sido isoladas de ambientes mesofílicos e termofílicos (Sousa & Silva-Souza 2001).…”

Section: Diversidade Bacteriana Em áReas Orizícolasunclassified

“…Algumas espécies de enterobactérias têm sido isoladas em águas de orizicultura (Reche & Fiuza 2005), e caracterizadas nas pesquisas de Lourenço et al (2007) rettgeri e grupos não-fermentativos bacilos Gram negativos (NFGNB).…”

Section: Diversidade Bacteriana Em áReas Orizícolasunclassified

Bactérias E Bioindicadores De Qualidade De Águas De Ecossistemas Orizícolas Da Região Sul Do Brasil

2010

Self Cite

View full text Add to dashboard Cite

A presença de bactérias heterotróficas em ambientes aquáticos, como os agroecossistemas de produção de arroz irrigado, é determinada por processos bióticos e abióticos, onde se destacam os fatores físico-químicos e as interações de elevada complexidade com outros organismos. Nesse trabalho são abordados aspectos relacionados a estas bactérias, tais como: diversidade bacteriana em áreas orizícolas, coliformes totais e termotolerantes como indicadores ambientais. Também são mencionados tópicos relacionados aos wetlands naturais e artificiais, a viabilidade de bactérias entéricas, os impactos, a reutilização e o monitoramento da água nos ecossistemas orizícolas. Palavras-chave: Agroecossistemas; coliformes; qualidade microbiológica. ABSTRACT BACTERIA AND BIOINDICATORS OF THE WATER QUALITY IN IRRIGATED RICE FIELD ECOSYSTEMS IN THE SOUTHERN REGIONS OF BRAZIL.The presence of heterotrophic bacteria in aquatic environments, such as those in the agricultural systems of irrigated rice fields, is determined by biotic and abiotic processes, with the focus on physical-chemical factors and highly complex interactions with other organisms. In this study, we address aspects related to these bacteria, such as: bacterial diversity in rice growing areas, total coliforms and thermotolerant as environmental indicators. Are also mentioned topics related to natural and artificial wetlands, the viability of enteric bacteria, the environmental impacts, reuse and monitoring of water in rice fields ecosystems. Key words: Agroecosystems; coliforms; microbiological quality. RESUMEN BACTERIAS Y BIO-INDICADORES DE LA CALIDAD DE AGUA DE LOS ECOSISTEMAS DE LOS CULTIVOS ARROZ IRRIGADO EN LA REGIÓN SUR DE BRASIL. La presencia de bacteriasheterotróficas en ambientes acuáticos, como los agroecosistemas de producción de arroz irrigado, esta determinada por procesos bióticos y abióticos, en los que destacan factores fisico-químicos e interacciones muy complejas con otros organismos. En este trabajo se discuten algunos aspectos relacionados a estas bacterias, como la diversidad bacteriana en zonas de cultivo de arroz y coliformes totales y termotolerantes considerados como indicadores ambientales. También se discuten tópicos relacionados a humedales naturales y artificiales, a la viabilidad de bacterias entéricas, a los impactos causados y a la reutilización y monitoreo del agua en los ecosistemas de cultivo de arroz.

show abstract

Bacterial diversity in rice-field water in Rio Grande do Sul

Cited by 15 publications

References 15 publications

Significance and Roles of Proteus spp. Bacteria in Natural Environments

Significance and Roles of Proteus spp. Bacteria in Natural Environments

Genetic diversity of siderophore-producing bacteria of tobacco rhizosphere

Bactérias E Bioindicadores De Qualidade De Águas De Ecossistemas Orizícolas Da Região Sul Do Brasil

Contact Info

Product

Resources

About