Evaluation of Halobacterial Extracellular Hydrolytic Activities in Several Natural Saline and Hypersaline Lakes from Romania.
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Date
2014-05
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Abstract
This work presents the evaluation of extracellular hydrolytic activities involved in the
degrading of organic compounds from several natural salt lakes located in the southern
part of Romania. The paper approaches the extracellular enzymatic decomposition
activity in accordance with several physico-chemical parameters and microbial
abundance. The chloride content was 13 g/l in Balta Albă salt lake, around 15 – 17 g/l in
Amara salt lake, 80 g/l in Movila Miresei hypersaline lake and close to saturation, 252 g/l
respectively in the case of Ocnele Mari hypersaline sample. The chemical composition
revealed that salinity is due to compounds of sulphur, chloride and potassium in lakes
Balta Alba and Amara. In Movila Miresei, potassium is replaced by sodium and in Ocnele
Mari the salinity is due mainly to chloride and sodium. The enzyme α –glucosidase
showed high values in the hypersaline lakes Movila Miresei and Ocnele Mari and a similar
profile was recorded also for β-glucosidase. The activity of the enzyme alkaline
phosphatase is directly correlated with the chloride content. The enzyme aminopeptidase
showed high values if compared with previously mentioned enzymes.
Description
Keywords
Salt lake, extracellular hydrolases, halophilic microorganisms, halophilic enzyme.
Citation
Păceşilă Ioan, Cojoc Roxana, Enache Mădălin. Evaluation of Halobacterial Extracellular Hydrolytic Activities in Several Natural Saline and Hypersaline Lakes from Romania. British Biotechnology Journal. 2014 May; 4(5): 541-550.