Utilization of phosphate diester by the marine diatom Chaetoceros ceratosporus |
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| Authors: | Yamaguchi Haruo; Yamaguchi Mineo; Fukami Kimio; Adachi Masao; Nishijima Toshitaka |
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| Affiliation: | 1 Harmful Phytoplankton Section, Harmful Algal Bloom Division, National Research Institute of Fisheries and Environment of Inland Sea, Fisheries Research Agency, Ohno, Saeki, Hiroshima 739-0452, Japan, 2 Laboratory of Environmental Conservation, Graduate School of Kuroshio Science, Kochi University, Nankoku, Kochi 783-8502, Japan and 3 Laboratory of Aquatic Environmental Science, Kochi University, Nankoku, Kochi 783-8502, Japan |
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| Abstract: | Utilization of phosphate diester (PDE) and phosphodiesterase(PDEase) production by five marine phytoplankton species wereexamined in the laboratory to evaluate the contribution of PDEto the growth of phytoplankton. Among the five marine phytoplanktonspecies tested, only Chaetoceros ceratosporus was able to usethe PDE compound, bis(p-nitrophenyl) phosphate (bis-NPP), effectivelyas a sole phosphorus source. In addition, C. ceratosporus simultaneouslyproduced both PDEase and alkaline phosphatase (APase) at almostequal activity levels under the phosphate-deficient condition.These results suggest that PDE compounds presumably play animportant role as a phosphorus source for PDEase-producing phytoplanktonin coastal environments. |
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