Molybdenum-nitrogen co-limitation in freshwater and coastal heterocystous cyanobacteria
نویسندگان
چکیده
منابع مشابه
Molybdenum assimilation by cyanobacteria and phytoplankton in freshwater and salt water
We measured the uptake rate of molybdatc and related kinetic parameters for nine taxa of cyanobacteria and for the natural phytoplankton communities of six freshwater lakes containing planktonic Nz-fixing cyanobacteria. Molybdate uptake followed saturation kinetics and was competitively inhibited by both tungstate and sulfate. Tungstate inhibited molybdate uptake in a nearly mole-for-mole fashi...
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Most of the research to date on cyanobacterial uptake hydrogenases has been performed on filamentous heterocystous strains. However, recent results on the hup gene cluster organization and its transcriptional regulation in non-heterocystous strains has contributed to the widening of knowledge in this field. In the present study, we outline the recent findings on uptake hydrogenases from non-het...
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9.2 Environmental and Ecological Constraints ............... 272 9.2.1 Physical Disturbance ...................................................... 272 9.2.2 Light ............................................................................... 273 9.2.3 Temperature ................................................................... 273 9.2.4 Nutrients ...............................................
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Nitrogen sources commonly used by cyanobacteria include ammonium, nitrate, nitrite, urea and atmospheric N(2), and some cyanobacteria can also assimilate arginine or glutamine. ABC (ATP-binding cassette)-type permeases are involved in the uptake of nitrate/nitrite, urea and most amino acids, whereas secondary transporters take up ammonium and, in some strains, nitrate/nitrite. In cyanobacteria,...
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ژورنال
عنوان ژورنال: Limnology and Oceanography
سال: 2010
ISSN: 0024-3590
DOI: 10.4319/lo.2010.55.2.0667