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  • Pawlik, B, et al. (author)
  • pH-dependent cadmium transport inhibits photosynthesis in the cyanobacterium Synechocystis aquatilis
  • 1993
  • In: Environmental and Experimental Botany. - 0098-8472 .- 1873-7307. ; 33:2, s. 331-337
  • Journal article (peer-reviewed)abstract
    • Short-term (5-120 sec) transport of cadmium (Cd-109) into cells of the unicellular cyanobacterium Synechocystis aquatilis was studied using a rapid filtration technique. The transport was strongly pH-dependent, occurring at pH 7, but not at pH 5.5, and was also observed in long-term (40 min) experiments. For this process the optimum pH was approximately 7.5; uptake was considerably reduced at lower pHs. The entrance of cadmium disturbed photosynthetic activity and related processes. At pH 7, cadmium (8.9 muM) decreased CO2 fixation by about 55%, inhibited carbonic anhydrase activity (completely in intact cells, by 65%, in cell-free extracts) and photosynthetic O2-evolution by about 50%. At pH 5.5 no effects were observed.
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  • Result 1-1 of 1
Type of publication
journal article (1)
Type of content
peer-reviewed (1)
Author/Editor
Pawlik, B. (1)
Samuelsson, Göran, 1 ... (1)
Gardeström, Per, 195 ... (1)
Skowroński, T (1)
Ramazanow, Z (1)
University
Umeå University (1)
Language
English (1)
Research subject (UKÄ/SCB)
Natural sciences (1)
Year
1993 (1)

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