Sediment underlying the oxygen minimum zone of the eastern Arabian Sea is rich in organic matter. Bacteria in this sediment-water interface are of great ecological importance as they are responsible for decomposing, mineralizing and subsequent recycling of organic matter. This study has for the first time addressed the phylogenetic and functional description of culturable bacteria of this region. Genotypic characterization of the isolates using amplified rDNA restriction analysis (ARDRA) followed by 16SrRNA sequencing grouped them into various phylogenetic groups such as Firmicutes, Gammaproteobacteria, Low G+C Gram positive bacteria, Actinobacteria and unaffiliated bacteria. Among the enzyme activities, phosphatase was predominant (52%) and was associated with all the phylotypes followed by amylase (37%) and gelatinase (33%). These hydrolytic enzymes were expressed at a wide range of temperature and pH. Firmicutes expressed most of the hydrolytic activities, consistent with a role in degradation of organic matter. Multiple enzyme expression (>/=3) was exhibited by Actinobacteria (100%), followed by unaffiliated group (62.5%) and Firmicutes (61.5%). Besides hydrolytic enzymes, the phylotypes also elaborated functional enzymes such as nitrate reductase and catalase (58 and 81% of the isolates, respectively). In the oxygen minimum zone, the diversity was high with 28 phylotypes. Culturable bacterial assemblages encountered were Bacillus sp., Halobacillus sp., Virgibacillus sp., Paenibacillus sp., Marinilactibacillus sp., Kytococcus sp., Micrococcus sp., Halomonas sp. and Alteromonas sp. The high diversity and high percentage of extracellular hydrolytic enzyme activities of the culturable bacteria reflect their important ecological role in biogeochemical cycling of organic matter in the oxygen minimum zone.

The pigment can be used as a colouring agent in cosmetics. Its anticancer potential can be used in production of therapeutics in increasing demand cancer research.

Background and objective: Chronic diseases are associated with low-grade inflammation and oxidative damage. Traditional medicines have been used to manage these disorders due to their high polyphenol content and potent antioxidant activity. We evaluated the in-vitro anti-diabetic and antioxidant potential of extracts of several medicinal plants namely, Mangifera indica, Terminalia arjuna, Moringa oleifera, Albizia lebbeck, Terminalia chebula and Hippophae rhamnoides. Methods: Total polyphenol, flavonoid, and saponin contents were estimated by standard methods. Antioxidant activity was measured using 2, 2-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging assay. The anti-diabetic potential was evaluated using in-vitro α-glucosidase inhibition assay. Background and objective: Chronic diseases are associated with low-grade inflammation and oxidative damage. Traditional medicines have been used to manage these disorders due to their high polyphenol content and potent antioxidant activity. We evaluated the in-vitro anti-diabetic and antioxidant potential of extracts of several medicinal plants namely, Mangifera indica, Terminalia arjuna, Moringa oleifera, Albizia lebbeck, Terminalia chebula and Hippophae rhamnoides. Methods: Total polyphenol, flavonoid, and saponin contents were estimated by standard methods. Antioxidant activity was measured using 2, 2-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging assay. The anti-diabetic potential was evaluated using in-vitro α-glucosidase inhibition assay. Results: Terminalia chebula was found to be the richest in both polyphenols (566.5±21.9 µg Gallic acid equivalents/mg of dry weight) and flavonoids (190.67±10.78 quercetin equivalents/mg of dry weight). Extract of Terminalia arjuna was the richest source of saponins (171.92±12.48 μg saponin equivalents/mg of dry weight). All plant extracts showed potent anti-oxidant activity as reflected by their IC50 values in DPPH assay, with Albizia lebbeck (IC50 = 1.35 µg/ml) being the most potent. All plant extracts also showed potent anti-diabetic activity as inferred from their ability to inhibit αglucosidase, the principal enzyme involved in the metabolism of dietary carbohydrates in the intestine. It was observed that all tested extracts were more potent (IC50 2.53 to 227 µg/ml) in comparison to the standard α-glucosidase inhibitor Acarbose (IC50=2.7 mg/ml). Conclusions: The plant extracts of Mangifera indica, Terminalia arjuna, Moringa oleifera, Albizia lebbeck, Terminalia chebula,and Hippophae rhamnoides possess potent antioxidant and α-glucosidase inhibitory potential and can aid in the management of postprandial hyperglycemia and oxidative damage. Conclusions: The plant extracts of Mangifera indica, Terminalia arjuna, Moringa oleifera, Albizia lebbeck, Terminalia chebula,and Hippophae rhamnoides possess potent antioxidant and α-glucosidase inhibitory potential and can aid in the management of postprandial hyperglycemia and oxidative damage.

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Phylogenetic implication in bacterial genomics is important to understanding difficulties such as population history, antimicrobial resistance and transmission dynamics. It has been claimed that partial genome sequences would clarify phylogenetic relationships between isolated organisms, but up to now, no sustaining approach has been proposed to use competently these data. concatenation of sequences of different genes as well as building of consensus trees only consider the few genes that are shared among all organisms. The phylogenetic has been plagued by an apparent state of contradiction since the distorting effects of recombination on phylogeny were discovered more than a decade ago. Total of 100 isolates were isolated wilted tomato plant and rhizosphere soil, amongst ten highly virulent isolates were selected based on morphological, biochemical characteristics and pathogenicity studies, as well as 16S rRNA gene sequencing. The rhizosphere soil samples of healthy tomato plants were used to isolate T. asperellum and P. fluorescens were identified based on morphological and molecular characterization. Total of fifteen isolates among them, ten isolates of R. solanacearum, three isolates of Pseudomonas fluorescens and two isolates of Trichoderma asperellum were isolated from soil samples collected from different locations in Karnataka. The present work demonstrates for the identification of R. solanacearum, P. fluorescens and T. asperellum based on molecular methods based on 16S rRNA sequencing and NCBI BLAST search was performed, multiple sequences alignment and phylogenetic trees were constructed using CLUSTAL X2 2.1 (Windows version). The sequences were deposited to NCBI database.