caa a22 4500 475783859 CHVBK 20180406123652.0 cr unu---uuuuu 170329e20001001xx s 000 0 eng 10.1023/A:1008113932640 doi (NATIONALLICENCE)springer-10.1023/A:1008113932640 Surface phosphomonoesterase activity of a natural immobilized system: Chroococcidiopsis in an Antarctic desert rock [Elektronische Daten] [Meenakshi Banerjee, Brian Whitton, David Wynn-Williams] The phosphomonoesterase activity of a microbialcommunity dominated by Chroococcidiopsis in arock sample from the Antarctic dry desert was comparedwith that of a non-axenic culture of thecyanobacterium isolated from the same rock in order toestablish whether the organism differed in itsproperties when immobilized in the rock. The pHoptimum (9.5) was the same, but the response totemperature and light both differed. In the case oftemperature, the optimum was much higher in culture. Light flux at the low value of 8 μmol photonm-2 s-1 was slightly inhibitory for acrushed rock sample, but enhanced activity of thecultured material. Although materials both showeda typical (apparent) Michaelis-Menten relationship,the values for Km and Vmax differed. Itis suggested that study of natural immobilized systemsis important for the development of procedures to useimmobilized phototrophs for practical purposes. Kluwer Academic Publishers, 2000 endoliths nationallicence Antarctic nationallicence desert nationallicence Chroococcidiopsis nationallicence phosphomonoesterase nationallicence lowlight flux nationallicence immobilization nationallicence Banerjee Meenakshi Department of Biological Sciences, University of Durham, DH1 3LE, Durham, UK aut Whitton Brian Department of Biological Sciences, University of Durham, DH1 3LE, Durham, UK aut Wynn-Williams David British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, CB3 OET, Cambridge, UK aut Journal of Applied Phycology Kluwer Academic Publishers 12/3-5(2000-10-01), 549-552 0921-8971 12:3-5<549 2000 12 10811 https://doi.org/10.1023/A:1008113932640 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1008113932640 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Banerjee Meenakshi Department of Biological Sciences, University of Durham, DH1 3LE, Durham, UK aut NATIONALLICENCE 700 1- Whitton Brian Department of Biological Sciences, University of Durham, DH1 3LE, Durham, UK aut NATIONALLICENCE 700 1- Wynn-Williams David British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, CB3 OET, Cambridge, UK aut NATIONALLICENCE 773 0- Journal of Applied Phycology Kluwer Academic Publishers 12/3-5(2000-10-01), 549-552 0921-8971 12:3-5<549 2000 12 10811 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer