Browsing by Author "Jasna, V."
Now showing items 1-17 of 17
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Comparison of bacterial community structure in coastal and offshore waters of the Bay of Bengal, India
Jasna, V.; Nathan, V.K.; Parvathi, A. (Elsevier BV, 2020)Bacterial community structure was analysed from the coastal and offshore surface waters of the Bay of Bengal (BoB) using of Next Generation Sequencing (NGS) approach. Taxonomic richness was high in the offshore waters ... -
Comparison of bacterial diversity from two mangrove ecosystems from India through metagenomic sequencing: Comparative mangrove bacterial diversity using metagenomics
Nathan, V.K.; Jasna, V.; Parvathi, A. (Elsevier B.V., 2020)In the present study, we explored the microbial diversity of two mangrove regions, Mangalavanam (MAN) and Puthuvype (PVY), in Cochin, India. While PVY is a coastal island, MAN lies in the heart of the mainland of Cochin, ... -
Differential impact of lytic viruses on prokaryotic morphopopulations in a tropical estuarine system (Cochin estuary, India)
Jasna, V.; Ram, A.S.P.; Parvathi, A.; Sime-Ngando, T. (Public Library of Science, 2018)Our understanding on the importance of viral lysis in the functioning of tropical estuarine ecosystem is limited. This study examines viral infection of prokaryotes and subsequent lysis of cells belonging to different ... -
Diurnal variations in bacterial and viral production in Cochin estuary, India
Parvathi, A.; Jasna, V.; Haridevi, C.K.; Jina, S.; Greeshma, M.; Breezy, J.; Nair, M. (Springer, 2013)Microbes play a central role in the decomposition and remineralization of organic matter and recycling of nutrients in aquatic environments. In this study, we examined the influence of physical, chemical, and biological ... -
Diversity pattern of marine culturable heterotrophic bacteria in a region with coexisting upwelling and mud banks in the southeastern Arabian Sea
Jasna, V.; Parvathi, A.; Nathan, V.K. (Springer, 2022)Mud banks and upwelling are two important oceanographic features occurring along the southwest coast of India during the southwest monsoon period. The study region, Alappuzha lying on the southwest coast of India, is unique ... -
Dominance of Wolbachia sp. in the deep-sea sediment bacterial metataxonomic sequencing analysis in the Bay of Bengal, Indian Ocean
Parvathi, A.; Jasna, V.; Aswathy, V.K.; Aparna, S.; Nathan, V.K.; Jyothibabu, R. (2020)The Bay of Bengal, located in the north-eastern part of the Indian Ocean is world's largest bay occupying an area of ~8,39,000 mile2. The variability in bacterial community structure and function in sediment ecosystems of ... -
Effects of hydrography on the distribution of bacteria and virus in Cochin Estuary, India
Parvathi, A.; Jasna, V.; Jina, S.; Jayalakshmy, K.V.; Lallu, K.R.; Madhu, N.V.; Muraleedharan, K.R.; NaveenKumar, K.R.; Balachandran, K.K. (Ecological Society of Japan, 2015)The viral dynamics have rarely been investigated in estuarine environments of India. The present study brings out a first hand information on the distribution of virus and bacteria in an eutrophic estuary (Cochin, India). ... -
Factors determining variations in viral abundance and viral production in a tropical estuary influenced by monsoonal cycles
Jasna, V.; Parvathi, A.; Aswathy, V.K.; Aparna, S.; Dayana, M.; Aswathy, A.J.; Madhu, N.V. (Elsevier, 2019)Viruses are the most abundant, dynamic, and ubiquitous components in the marine and estuarine environments. They outnumber prokaryotes in their abundance by at least one order of magnitude, but their relationship varies ... -
Genetic and functional diversity of double-stranded DNA viruses in a tropical monsoonal estuary, India
Jasna, V.; Parvathi, A.; Dash, A. (Nature Publishing Group, 2018)The present study illustrates the genetic diversity of four uncultured viral communities from the surface waters of Cochin Estuary (CE), India. Viral diversity inferred using Illumina HiSeq paired-end sequencing using a ... -
High Incidence of Lysogeny in the Oxygen Minimum Zones of the Arabian Sea (Southwest Coast of India)
Parvathi, A.; Jasna, V.; Aparna, Sreekumar; Ram, A.S.P.; Aswathy, V.K.; Balachandran, K.K.; Muraleedharan, K.R.; Mathew, D.; Sime-Ngando, T. (Multidisciplinary Digital Publishing Institute- MDPI AG, Basel, Switzerland, 2018)Though microbial processes in the oxygen minimum zones (OMZs) of the Arabian Sea (AS) are well documented, prokaryote-virus interactions are less known. The present study was carried out to determine the potential ... -
Influence of hydrological factors on bacterial community structure in a tropical monsoonal estuary in India
Parvathi, A.; Catena, M.; Jasna, V.; Phadke, N.; Gogate, N. (Springer, 2021)In the present study, we analyzed variations in bacterial community structure along a salinity gradient in a tropical monsoonal estuary (Cochin estuary [CE]), on the southwest coast of India, using Illumina next-generation ... -
Microbial diversity in a coastal environment with co-existing upwelling and mud-banks along the south west coast of India
Parvathi, A.; Jasna, V.; Aswathy, V.K.; Nathan, V.K.; Aparna, S.; Balachandran, K.K. (2019)Upwelling and mud banks are two prominent oceanographic features in the coastal waters along the south west coast of India during the southwest monsoon (MON) season. The present study investigates the microbial diversity ... -
Optimization of urease production by Bacillus halodurans PO15: a mangrove bacterium from Poovar mangroves, India
Nathan, V.K.; Jasna, V.; Parvathi, A. (Springer Science and Business Media LLC, 2020)Mangrove ecosystems are one of the most versatile habitats for microorganisms with a high potential for producing a variety of extracellular hydrolytic enzymes. In this study, bacteria with urease activity, enzymes that ... -
Pesticide application inhibit the microbial carbonic anhydrase-mediated carbon sequestration in a soil microcosm
Nathan, V.K.; Jasna, V.; Parvathi, A. (Springer, 2020)Heterotrophic system for carbon sequestration is gaining importance in the recent decades. Carbonic anhydrase (CA) is a major enzyme involved in carbon sequestration and biomineralization process. In this paper, we evaluate ... -
Photocatalytic degradation of synthetic dyes using iron (III) oxide nanoparticles (Fe 2 O 3 -Nps) synthesised using Rhizophora mucronata Lam
Nathan, V.K.; Ammini, P.; Jasna, V. (2019)Biosynthesis of nanoparticles through plant extracts is gaining attention due to the toxic free synthesis process. The environmental engineering applications of many metal oxide nanoparticles have been reported. In this ... -
Seasonal variations in viral distribution, dynamics, and viral-mediated host mortality in the Arabian Sea
Aparna, S.; Parvathi, A.; Jasna, V.; Ram, A.S.P.; Sime-Ngando, T. (Springer, 2021)Viruses are key players in the marine ecosystem. It is critical to study specific viral processes and their inter-relationship with various biotic and abiotic variables to quantify their impact on the marine environment. ... -
Viral-Induced Mortality of Prokaryotes in a Tropical Monsoonal Estuary
Jasna, V.; Parvathi, A.; Ram, A.S.P.; Balachandran, K.K.; Madhu, N.V.; Nair, M.; Jyothibabu, R.; Jayalakshmy, K.V.; Revichandran, C.; Sime-Ngando, T. (Frontiers, 2017)Viruses are recognized as the most abundant and dynamic biological entities in the marine and estuarine environment. However, studies on the dynamics and activity of viruses in transient estuarine systems are limited. This ...