Nitrate assimilation by zooxanthellae maintained in laboratory culture |
| |
| Authors: | F P Wilkerson R K Trench |
| |
| Institution: | Department of Biological Sciences and Marine Science Institute, University of California, Santa Barbara, CA 93106 U.S.A. |
| |
| Abstract: | The ability of cultured zooxanthellae to use ammonium and nitrate was tested. The zooxanthellae were initially isolated from the anemone Aiptasia pulchella. The zooxanthellae were able to grow on media supplemented with either form of dissolved inorganic nitrogen (DIN) although ammonium was inhibitory above 300 μM. In accord with the intact symbiosis and freshly isolated algae, the cultured zooxanthellae took up ammonium. In contrast, the cultured algae demonstrated nitrate uptake and utilization. This was enhanced with DIN deprivation. Nitrate reductase was found in the algae and appeared to be inducible. Within the animal host, excretory ammonium may repress this induction. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
