ABSTRACT
Various Bacillus spp. capable of producing enzymes with industrially desirable properties have been isolated from adverse environments. Here, we announce the 3.91-Mbp draft genome sequence of a moderately salt-resistant Bacillus vallismortis strain, TD3, capable of producing several industrially relevant enzymes.
ABSTRACT
We report the 5.3-Mbp genome sequence of Bacillus cereus strain TS2, which was isolated from the sediments of a solar saltern in southern India. Genome analysis of B. cereus TS2, a salt-resistant strain, will improve our understanding of how B. cereus, a food pathogen, responds to hyperosmotic stress.
ABSTRACT
The unicellular marine alga Dunaliella salina is a most interesting green cell factory for the production of carotenes and lipids under extreme environment conditions. However, the culture conditions and their productivity are the major challenges faced by researchers which still need to be addressed. In this study, we investigated the effect of bicarbonate amendment on biomass, photosynthetic activity, biochemical constituents, nutrient uptake and antioxidant response of D. salina during macronutrient deficit conditions (N-, P- and S-). Under nutrient deficit conditions, addition of sodium bicarbonate (100 mM) significantly increased the biomass, carotenoids including ß-carotene and lutein, lipid, and fatty acid content with concurrent enhancement of the activities of nutrient assimilatory and carbonic anhydrase enzymes. Maximum accumulation of carotenoid especially ß-carotene (192.8 ± 2.11 µg/100 mg) and lipids (53.9%) was observed on addition of bicarbonate during nitrate deficiency compared to phosphate and sulphate deficiency. Supplementation of bicarbonate reduced the oxidative stress caused by ROS, lowered lipid peroxidation damage and improved the activities of antioxidant enzymes (SOD, CAT and APX) in D. salina cultures under nutrient stress.
