Dominance of Wolbachia sp. in the deep-sea sediment bacterial metataxonomic sequencing analysis in the Bay of Bengal, Indian Ocean

Parvathi, Ammini; Jasna, Vijayan; Aswathy, Vijaya Krishna; Aparna, S G; Nathan, Vinod Kumar; Jyothibabu, R.

doi:10.1016/j.ygeno.2019.06.019

Cited by 12 publications

(5 citation statements)

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“…The bacteria that showed the potential to hydrolyse the unique and complex macroalgal polysaccharides are very scarce and known to contribute to the remineralization of macroalgae after the completion of a growth cycle (Florez et al, 2017; Naik et al, 2019). Studies in the water column of the seaweed ecosystem show the dominance of Firmicutes and Proteobacteria (Kizhakkekalam & Chakraborty, 2019; Parvathi et al, 2020). Our study showed the diversity of potential MABs belonging to phylum Firmicutes (68%), followed by Proteobacteria (26%) and Actinobacteria (5%).…”

Section: Discussionmentioning

confidence: 99%

Prebiotic potential of enzymatically produced ulvan oligosaccharides using ulvan lyase of Bacillus subtilis, NIOA181, a macroalgae-associated bacteria

Jagtap

Parab

Manohar

et al. 2022

Journal of Applied Microbiology

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Aims:To characterize the polysaccharide hydrolyzing potential of macroalgaeassociated bacteria (MABs) for the enzymatic production of oligosaccharides and determining their prebiotic potential. Methods and Results:Approximately 400 MABs were qualitatively characterized for polysaccharide hydrolyzing activity. Only about 5%-15% of the isolates were found to have the potential for producing porphyranase, alginate lyase and ulvan lyase enzymes, which were quantified in specific substrate broths. One potential MAB, Bacillus subtilis, NIOA181, isolated from green macroalgae, showed the highest ulvan lyase activity. This enzyme was partially purified and used to hydrolyse ulvan into ulvan oligosaccharides. Structural characterization of ulvan oligosaccharides showed that they are predominantly composed of di-, tri-and tetrasaccharide units. Results showed that the enzymatically produced ulvan oligosaccharides exhibited prebiotic activity by promoting the growth of probiotic bacteria and suppressing the enteric pathogens, which were higher than the ulvan polysaccharide and equivalent to commercial fructooligosaccharides. Conclusions:A potential MAB, NIOA181, producing ulvan lyase was isolated and used for the production of ulvan oligosaccharides with prebiotic activity.Significance and Impact of the Study: Rarely studied ulvan oligosaccharides with prebiotic activity can be widely used as an active pharmaceutical ingredient in nutraceutical and other healthcare applications.

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Section: Discussionmentioning

confidence: 99%

Prebiotic potential of enzymatically produced ulvan oligosaccharides using ulvan lyase of Bacillus subtilis, NIOA181, a macroalgae-associated bacteria

Jagtap

Parab

Manohar

et al. 2022

Journal of Applied Microbiology

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“…Pseudomonas and Alteromonas, which are predicted to play a role in building matrix outside cells to induce or control mineralization, suggest that these bacteria possibly play a role in the formation of polymetallic nodules in the Indian Ocean. Another study using the Illumina MiSeq platform was conducted on sediments from the Bay of Bengal region of the Indian Ocean also showed that bacterial diversity within the deep-sea sediments is quite similar (Parvathi et al, 2020). Proteobacteria dominated the sediments, followed by Firmicutes, Cyanobacteria, Bacteroidetes, Actinobacteria, Chloroflexi, and Planctomycetes.…”

Section: Bacterial Diversity In the Abyssal Regions Of The Indian Ocean Based On Culture-independent Methodsmentioning

confidence: 98%

“…Gartner et al (2011) studied the effect of hydrostatic pressure on the microbial communities from the deep sea sediments of Eastern Mediterranean and revealed that Gamma-proteobacteria had selective advantage over others under mimicked nutrient supply in elevated pressure conditions. Marine microbial communities are important for the structure and dynamics of food webs, global biogeochemical cycles, and the remineralization of organic matter (Jørgensen and Boetius, 2007;Parvathi et al, 2020;Wei et al, 2020). The microbial processes occurring along the seafloor are essential in sustaining primary and secondary production in the water column.…”

Section: Introductionmentioning

confidence: 99%

Bacterial and Fungal Diversity in Sediment and Water Column From the Abyssal Regions of the Indian Ocean

2021

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The deep sea is the largest environment on Earth, comprising important resources of commercial interest. It is composed of a wide variety of ecosystems, which is home to often unique organisms that are yet to be described. The deep-sea is one of the least studied environments, where research is strongly linked to technological access and advances. With the recent advances in the next-generation sequencing and bioinformatics tools, there is an enhanced understanding of microbial diversity and ecological functions in deep sea. Multidisciplinary programs are being undertaken to investigate into microbial communities in diverse marine environments. As compared to other Oceans, the deeper parts of Indian Ocean are still poorly sampled and studied for bacterial, and more so fungal diversity. The studies reporting usage of modern sequencing tools to describe uncultured microbial diversity have seen a rise in numbers in the last decade. In this review, we summarize the important findings of research works carried on bacterial and fungal diversity from the abyssal regions of the Indian Ocean and provide our views on possible future paths.

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“…Instead, increased turbidity and low bottom water salinity are the leading cause of the seasonally stressed environment in the mudbank [65]. The microbial diversity in the coastal environments of Alappuzha showed a significant difference between stations having only upwelling and upwelling and mudbank [66].…”

Section: Biogeochemical Processes In Mudbanksmentioning

confidence: 96%

Characteristics of Mudbanks along the Southwest Coast of India

2021

EESRR

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Mudbank is a unique phenomenon observed along the south-west coast of India among all the Indian coastal regions during the Southwest Monsoon Season. The scientific reasons behind the formation and its persistence are vague. Mudbank is considered as a boon to the fishermen of Kerala, as they are getting reasonable catches during the occurrence of mudbanks using indigenous boats from the calm sea, which otherwise is in a fury during the rough Southwest Monsoon Season. Since the region, the Arabian Sea, is significant as a carbon sink due to its very high productivity because of different coastal ocean features, variations in the smaller and highly restricted coastal processes due to climate change can have a significant impact on the rates of global warming. Here, we consolidate the previous publications on various aspects of mudbanks with the reports of the occurrence of mudbanks on the south-west coast of India. A model for the prediction of the formation and location of mudbanks, inclusive of all the intrinsic and extrinsic parameters involved, through an extensive study is much relevant as far as the socio-economic and food security significance is concerned. Here, we discuss the most conducive factors for the formation of mudbank and its characteristics with special reference to Alappuzha, where the frequency of occurrence of mudbanks is maximum among the Indian coastal regions.

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Dominance of Wolbachia sp. in the deep-sea sediment bacterial metataxonomic sequencing analysis in the Bay of Bengal, Indian Ocean

Cited by 12 publications

References 59 publications

Prebiotic potential of enzymatically produced ulvan oligosaccharides using ulvan lyase of Bacillus subtilis, NIOA181, a macroalgae-associated bacteria

Prebiotic potential of enzymatically produced ulvan oligosaccharides using ulvan lyase of Bacillus subtilis, NIOA181, a macroalgae-associated bacteria

Bacterial and Fungal Diversity in Sediment and Water Column From the Abyssal Regions of the Indian Ocean

Characteristics of Mudbanks along the Southwest Coast of India

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