Cyanobacteria in Antarctica: ecology, physiology and cold adaptation.
作者： Kashyap Ak , Shukla Pn , Pandey Kd , Giri Dd , Shukla Sp
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摘要: Cyanobacterial species composition of fresh water and terrestrial ecosystems chemical environment in Schirmacher Oasis Continental Antarctica was investigated. Over 35 cyanobacteria were recorded. Diazotrophic both heterocystous unicellular contributed more than half to the count except lake ecosystem. The varied among as well ecosystems. physico-chemical analyses revealed its poor nurient content which might have supported growth diazotrophic an Antarctic environment. Among Oscillatoria, Phormidium Nostoc commune dominant flora most habitats. physiological characteristics isolated strains indicated that N2-fixation, nitrate uptake, nitrate-reduction, ammonium-uptake, GS-transferase activity photosynthesis unaffected at low temperature (5 degrees C) adaptation for cyanobacteria. This phenomenon not evident different tropical origin. optima N2-fixation cyanobacterial range 15-25 C, nearly 10 C lower their respective reference Similar results obtained cyanobacteria-moss association. endergonic activation energy exhibited by above metabolic activities view adapted
参考文章(37)
Jack Myers, W. A. Kratz, RELATIONS BETWEEN PIGMENT CONTENT AND PHOTOSYNTHETIC CHARACTERISTICS IN A BLUE-GREEN ALGA Journal of General Physiology. ,vol. 39, pp. 11- 22 ,(1955) , 10.1085/JGP.39.1.11
K. D. Pandey, A. K. Kashyap, R. K. Gupta, Nutrient status, algal and cyanobacterial flora of six fresh water streams of Schirmacher Oasis, Antarctica Hydrobiologia. ,vol. 299, pp. 83- 91 ,(1995) , 10.1007/BF00016888
J.B. Olson, T.F. Steppe, R.W. Litaker, H.W. Paerl, N2-Fixing Microbial Consortia Associated with the Ice Cover of Lake Bonney, Antarctica. Microbial Ecology. ,vol. 36, pp. 231- 238 ,(1998) , 10.1007/S002489900110
Evonne P. Y. Tang, Roxanne Tremblay, Warwick F. Vincent, CYANOBACTERIAL DOMINANCE OF POLAR FRESHWATER ECOSYSTEMS: ARE HIGH‐LATITUDE MAT‐FORMERS ADAPTED TO LOW TEMPERATURE? Journal of Phycology. ,vol. 33, pp. 171- 181 ,(1997) , 10.1111/J.0022-3646.1997.00171.X
W. F. Vincent, M. R. James, Biodiversity in extreme aquatic environments: lakes, ponds and streams of the Ross Sea sector, Antarctica Biodiversity and Conservation. ,vol. 5, pp. 1451- 1471 ,(1996) , 10.1007/BF00051987
Tracie-Lynn Nadeau, Eric C. Milbrandt, Richard W. Castenholz, EVOLUTIONARY RELATIONSHIPS OF CULTIVATED ANTARCTIC OSCILLATORIANS (CYANOBACTERIA) Journal of Phycology. ,vol. 37, pp. 650- 654 ,(2001) , 10.1046/J.1529-8817.2001.037004650.X
Paul A. Broady, Broadscale patterns in the distribution of aquatic and terrestrial vegetation at three ice-free regions on Ross Island, Antarctica Hydrobiologia. ,vol. 172, pp. 77- 95 ,(1989) , 10.1007/978-94-009-2603-5_7
Anne E. Hershey, John C. Priscu, Ecosystem dynamics in a polar desert : the McMurdo Dry Valleys, Antarctica Arctic, Antarctic, and Alpine Research. ,vol. 32, pp. 365- ,(1998) , 10.2307/1552540
P. A. Broady, Diversity, distribution and dispersal of Antarctic terrestrial algae Biodiversity and Conservation. ,vol. 5, pp. 1307- 1335 ,(1996) , 10.1007/BF00051981
Christian H. Fritsen, John C. Priscu, CYANOBACTERIAL ASSEMBLAGES IN PERMANENT ICE COVERS ON ANTARCTIC LAKES: DISTRIBUTION, GROWTH RATE, AND TEMPERATURE RESPONSE OF PHOTOSYNTHESIS Journal of Phycology. ,vol. 34, pp. 587- 597 ,(1998) , 10.1046/J.1529-8817.1998.340587.X