Endo-and exoglucanase activities in bacteria from mangrove sediment

Júnior, Fábio Lino Soares; Dias, Armando Cavalcante Franco; Fasanella, Cristiane Cipola; Taketani, Rodrigo Gouvêa; Lima, André Oliveira de Souza; Melo, I. S. de; Andreote, Fernando Dini

doi:10.1590/s1517-83822013000300048

Cited by 36 publications

(19 citation statements)

References 35 publications

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“…Understanding the nitrogen-fixing bacteria-mangrove model system is essential to study the interaction of molecular mechanisms involved. Soares Junior et al (2013) isolated different taxonomical groups of cellulolytic bacteria from mangrove sediments (Alphaproteobacteria, Gammaproteobacteria, Actinobacteria, Firmicutes and Bacteroidetes) and reported that mangrove soils harbor cellulolytic organisms with distinctive characteristics that can be further explored for cellulose degradation for distinct purposes.…”

Section: Maintain Biodiversitymentioning

confidence: 99%

Mangrove root: adaptations and ecological importance

Srikanth

Lum

Chen

2015

Trees

161

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Key message This review gives a comprehensive overview of adaptations of mangrove root system to the adverse environmental conditions and summarizes the ecological importance of mangrove root to the ecosystem. Abstract In plants, the first line of defense against abiotic stress is in their roots. If the soil surrounding the plant root is healthy and biologically diverse, the plant will have a higher chance to survive in stressful conditions. Different plant species have unique adaptations when exposed to a variety of abiotic stress conditions. None of the responses are identical, even though plants have become adapted to the exact same environment. Mangrove plants have developed complex morphological, anatomical, physiological, and molecular adaptations allowing survival and success in their high-stress habitat. This review briefly depicts adaptive strategies of mangrove roots with respect to anatomy, physiology, biochemistry and also the major advances recently made at the genetic and genomic levels. Results drawn from the different studies on mangrove roots have further indicated that specific patterns of gene expression might contribute to adaptive evolution of mangroves under high salinity. We also review crucial ecological contributions provided by mangrove root communities to the ecosystem including marine fauna.

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Section: Maintain Biodiversitymentioning

confidence: 99%

Mangrove root: adaptations and ecological importance

Srikanth

Lum

Chen

2015

Trees

161

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“…A previous study reported the isolation and identification of important enzymes, such as amylase, esterase, cellulose, and protease from endophytes of mangroves (Castro et al, 2014). Further, production of exo-and endoglucanases have been reported in different groups of bacteria isolated from mangrove sediments (Soares Júnior et al, 2013). In a recent study, cellulaseproducing bacterial strains of genus Bacillus and Brucella were isolated from mangrove soil (Behera et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Isolation, diversity, and biotechnological potential of rhizo- and endophytic bacteria associated with mangrove plants from Saudi Arabia

Bibi¹,

Ullah²,

Alvi

et al. 2017

Genet. Mol. Res.

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ABSTRACT. Marine bacteria have been exceptional sources of halotolerant enzymes since decades. The aim of the present study was to isolate bacteria producing hydrolytic enzymes from seven different mangroves collected from the coastal area of Thuwal, Jeddah, Saudi Arabia, and to further screen them for other enzymatic and antifungal activities. We have isolated 46 different rhizo-and endophytic bacteria from the soil, roots, and leaves of the mangroves using different enzymatic media. These bacterial strains were capable of producing industrially important enzymes (cellulase, protease, lipase, and amylase). The bacteria were screened further for antagonistic activity against fungal pathogens. Finally, these bacterial strains were identified on the basis of the16S rDNA sequence. Taxonomic and phylogenetic analysis revealed 95.9-100% sequence identity to type strains of related species. The dominant phylum was Gammaproteobacteria (γ-Proteobacteria), which comprised 10 different genera -Erwinia, Vibrio, Psychrobacter, Aidingimonas, Marinobacter, Chromohalobacter, Halomonas, Microbulbifer, and Alteromonas. Firmicutes was the second dominant phylum, which contained only the genus Bacillus. Similarly, only Isoptericola belonged to Actinobacteria. Further these enzymeproducing bacteria were tested for the production of other enzymes. Most of the active strains showed cellulytic and lipolytic activities. Several were also active against fungal pathogens. Our results demonstrated that the mangroves represent an important source of potentially active bacteria producing enzymes and antifungal metabolites (bioactive products). These bacteria are a source of novel halophilic enzymes and antibiotics that can find industrial and medicinal use.

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“…The degradation of lignocellulosic biomass such as rice straw is done by the collaboration of many microorganisms, including diverse fungal and bacterial genera producing a variety of cellulolytic enzymes under aerobic or anaerobic conditions. Cellulolytic microorganisms can degrade cellulose-based plant litter (Soares et al 2013). Cellulose is a linear polymer of glucose linked through ß-1,4-glycosidic linkages that is the primary structural material of the plant cell wall and is the most abundant carbohydrate in nature (Saha et al 2006).…”

Section: Introductionmentioning

confidence: 99%

Isolation and selection of cellulolytic bacteria from rice straw for consortium of microbial fuel cell

2020

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Abstract. Khoirunnisa NS, Anwar S, Santosa DA. 2020. Isolation and selection of cellulolytic bacteria from rice straw for consortium of microbial fuel cell. Biodiversitas 21: 1686-1696. Cellulose such as in rice straw can be utilized as an organic substrate in Microbial Fuel Cell (MFC) to generate electricity by microorganisms as a biocatalyst. This research aimed to get cellulose-degrading bacteria with high capability to degrade rice straw and able to be used as consortium with exoelectrogen bacteria in Microbial Fuel Cell. The stages of research included: (i) isolation of the bacteria using carboxymethylcellulose (CMC) agar medium, (ii) selection of the isolates for that purpose, (iii) enzyme assay and MFC performance test, and (iv) identification of selected isolate. There were 125 isolates that were obtained. Selection based on the ability to degrade cellulose as indicated by clear zone on CMC medium resulted in 23 isolates. Ten isolates belong to anaerobic facultative bacteria were selected. Three of them were synergistic with exoelectrogen bacteria. The three isolates were tested for exoglucanase (Avicel) and total enzyme activity (Filter Paper) with the highest results were 6.21 U/mL (isolate J404) and 5.88 U/mL (isolate J401), respectively. The optimum MFC performance was achieved by one isolate, J401, which produced highest voltage of 40.8 mV and a power density of 0.33 mW/m2. The best isolate, J401, was identified as Xanthomonas translucens based on 16S rRNA method.

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Endo-and exoglucanase activities in bacteria from mangrove sediment

Cited by 36 publications

References 35 publications

Mangrove root: adaptations and ecological importance

Mangrove root: adaptations and ecological importance

Isolation, diversity, and biotechnological potential of rhizo- and endophytic bacteria associated with mangrove plants from Saudi Arabia

Isolation and selection of cellulolytic bacteria from rice straw for consortium of microbial fuel cell

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