Effect of cobalt on growth, pigments and the photosynthetic electron transport in Monoraphidium minutum and Nitzchia perminuta
By M. El-sheekh, A. H. El-Naggar, M. Osman, E. El-Mazaly. 2003
138 citations recorded by the source corpus.
The unicellular green alga Monoraphidium minutum and the diatom Nitzschia perminuta were cultured under different concentrations of Co2+. Growth and pigment content were slightly increased at low concentrations and inhibited by high Co2+ concentrations. The results concerning the effect of different concentrations of Co2+ on photosynthetic O2 evolution showed a reduction in the amount of O2 evolved by each alga in response to increasing Co2+ concentrations. However, an increase in O2 evolution for both M. minutum and N. perminuta was observed at relatively low Co2+ concentrations. Photosynthetic electron transport in M. minutum was more sensitive to Co2+ toxicity than in N. perminuta. On the other hand, the effect of the heavy metal on respiration showed that higher Co2+ concentrations were inhibitory to O2 uptake by the two algal species. Low Co2+ concentrations stimulated O2 uptake by M. minutum throughout the experimental period. However, in N. perminuta, different concentrations of Co2+ led to a reduction of O2 uptake. To localize the action site of Co2+ in the photosynthetic electron transport chain, the fluorescence induction technique was carried out. According to the results obtained, the inhibitory action of Co2+ is located on the acceptor side of PSII for both M. minutum and N. perminuta.
Subfields: Molecular Biology, Oceanography, Renewable Energy, Sustainability and the Environment
View Paper: https://www.semanticscholar.org/paper/e5e66d4d6101f3b98f9c621b8f27c1333e42205f
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In Molecular Biology
Citations in the corpus
- Flow cytometric analysis of the cadmium-exposed green alga Chlamydomonas reinhardtii (Chlorophyceae) (2009, background): “( 2007 ) observed that cobalt concentrations of 0.”
- Changes in Growth, Biochemical Constituents, and Antioxidant Potentials in Radish (Raphanus sativus L.) under Cobalt Stress (2007, background): “This is strengthened by the fact that excessive amounts of a range of heavy metals, such as copper (33), cobalt (4), and nickel (34), have been shown to induce chlorosis in plants similar to the chlorosis of iron deficiency.”