Metabolic activity and bioweathering properties of yeasts isolated from different supraglacial environments of Antarctic
- PDF / 12,266,133 Bytes
- 16 Pages / 547.087 x 737.008 pts Page_size
- 49 Downloads / 191 Views
ORIGINAL PAPER
Metabolic activity and bioweathering properties of yeasts isolated from different supraglacial environments of Antarctica and Himalaya Aritri Sanyal . Runa Antony . Preethika Ganesan . Meloth Thamban
Received: 14 May 2020 / Accepted: 29 October 2020 / Published online: 20 November 2020 Ó Springer Nature Switzerland AG 2020
A. Sanyal (&) R. Antony M. Thamban National Centre for Polar and Ocean Research, Ministry of Earth Sciences, Headland Sada, Vasco da Gama, Goa 403804, India e-mail: [email protected]; [email protected]
properties, extracellular enzyme and carbon substrate utilization patterns of the isolated yeasts, reflect the specific environmental conditions from which they were isolated. Overall, 20–90% of the yeasts across all habitat types and geographical locations produced extracellular enzymes to degrade proteins, esters, carbohydrates, pectin, cellulose, lignin, and tannin. About 10 and 29% of the yeasts also exhibited ability to solubilize rock-minerals like phosphate and silicate, respectively. Additionally, selected isolates were able to metabolize 28–93% of the carbon substrates comprising different compound classes on Biolog YT plates. Overall, the ability of yeasts to use diverse organic compounds prevalent on the glacier surface, points to their ecological significance in the decomposition of organic matter, cycling of nutrients, and in the weathering of minerals in supraglacial environments. Moreover, their wide metabolic capabilities suggest that they can colonize new niches and environments when meltwater export during the summer that enables links with surrounding ecosystems.
P. Ganesan Department of Applied Microbiology, School of Bioscience and Technology, Vellore Institute of Technology, Vellore 632014, India
Keywords Organic matter cycling Extracellular polymeric substances Phosphate solubilization Silicate solubilization Blue ice Cryoconite hole
Abstract Yeasts have been frequently isolated from cold habitats, but their contribution to essential ecological processes such as the mineralization of organic matter in these environments is less known. Here, the diversity, metabolic capability, and extracellular enzyme profiles of yeasts from snow, blue ice and cryoconite hole environments from East Antarctica and cryoconite holes from a glacier in Western Himalaya were determined. Eighty-six yeast strains isolated were affiliated to the genera Glaciozyma, Goffeauzyma, Mrakia, Phenoliferia, and Rhodotorula. Variations in the abundance, diversity, physiological
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10482-020-01496-1) contains supplementary material, which is available to authorized users.
Present Address: P. Ganesan Department of Food Science, School of Chemical Sciences, University of Auckland, Auckland 1010, New Zealand
123
2244
Introduction There has been an increasing interest in the study of the microbial ecology of glaciers and ice sheets. These environments are now beginning to be recognized
Data Loading...
