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    Effects of nutrients, salinity, pH and light:dark cycle on the production of reactive oxygen species in the alga Chattonella marina

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    algal ROS production JEMBE revised 6_3_07.pdf (183.0Kb)
    Date
    2007-06-03
    Author
    Liu, Wenhua  Concept link
    Au, Doris W. T.  Concept link
    Anderson, Donald M.  Concept link
    Lam, Paul K. S.  Concept link
    Wu, Rudolf S. S.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/1764
    As published
    https://doi.org/10.1016/j.jembe.2007.03.007
    Keyword
     Chattonella marina; Reactive oxygen species; Iron; Nutrient; pH; Physical parameters; Plasma membrane; Redox 
    Abstract
    Experiments were carried out to investigate the effects of nutrients, salinity, pH and light:dark cycle on growth rate and production of reactive oxygen species (ROS) by Chattonella marina, a harmful algal bloom (HAB) species that often causes fish kills. Different nitrogen forms (organic-N and inorganic-N), N:P ratios, light:dark cycles and salinity significantly influenced algal growth, but not ROS production. However, iron concentration and pH significantly affected both growth and ROS production in C. marina. KCN (an inhibitor of mitochondrial respiration) and 3-(3,4-dichlorophenyl)-1,1-dimethylurea (an inhibitor of photosynthesis) had no significant effects on ROS production. Vitamin K3 (a plasma membrane electron shuttle) enhanced ROS production while its antagonist, dicumarol, decreased ROS production. Taken together, our results suggest that ROS production by C. marina is related to a plasma membrane enzyme system regulated by iron availability but is independent of growth, photosynthesis, availability of macronutrients, salinity and irradiance.
    Description
    Author Posting. © Elsevier B.V., 2007. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Journal of Experimental Marine Biology and Ecology 346 (2007): 76-86, doi:10.1016/j.jembe.2007.03.007.
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    • Biology
    Suggested Citation
    Preprint: Liu, Wenhua, Au, Doris W. T., Anderson, Donald M., Lam, Paul K. S., Wu, Rudolf S. S., "Effects of nutrients, salinity, pH and light:dark cycle on the production of reactive oxygen species in the alga Chattonella marina", 2007-06-03, https://doi.org/10.1016/j.jembe.2007.03.007, https://hdl.handle.net/1912/1764
     

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