| 摘要: |
| 于1991年4月 - 1992年1月，分别用不同浓度的三苯基氯化锡（TPTC）和三丁基氯化锡（TBTC）培养扁藻和金藻，测定24，48和72h两种藻的净光合速率和生长速率。结果表明，TBTC对两种藻的毒性大于TPTC；TPTC和TBTC在浓度为0.2 μg/L时，对两种藻的光合作用有轻微影响；浓度大干0.4 μg/L，两种藻的光合作用不同程度地受到抑制。扁藻对有机锡的耐受力大于金藻：扁藻用两种锡处理后，第一天受害最严重，第二天和第三天光合速率开始恢复；金藻经TPTC处理后随时间加长光合速率稍有恢复，而经TBTC处理后则未出现恢复现象。 |
| 关键词: 三丁基锡 三苯基锡 扁藻 金藻 光合作用 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金资助，48970274号 |
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| THE PHYSIOLOGICAL EFFECTS OF ORGANOTIN ON MARINE MICROALGAEII. EFFECTS OF TRIPHENYLTIN AND TRIBUTYLTIN ON PHOTOSYNTHESIS OF DICRATERIA ZHANJIANGENSIS AND PLATYMONAS SP. |
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Gao Shangde, Wu Yiping, Zhao Xinyu
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Department of Biology, Ocean Unirertity of Qingdao, Qingdao 266003
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| Abstract: |
| The effect of tributyltin chloride (TBTC) and triphenyltin chloride (TPTC) on photosynthesis of pure cultures of Platymonas sp. and Dicrateria zhanjiangensis were tested from April 1991 to January 1992. The two species of marine microalgae were cultured in a range of concentration of TBTC and TPTC (0.2, 0.4, 0.6, 0.8, 1.0 μg/L) for 24h, 48h and 72h respectively. Different effects were observed within 24h at 0.2 μg/L of TBTC and TPTC, and photosynthesis and growth were markedly reduced after culture of the species in >=0.4 μg/L of the two chlorids. TBTC was more toxic than TPTC and its inhibition effect obviously occurred within 48h at 0.4 μg/L and 0.6 μg/L, the net photosynthesis rate was reduced to 70% of that of the control for P. sp., while TPTC slight inhibition occurred at 0.4 μg/L and at 0.6 μg/L; the net photosynthesis rate was reduced only about 25% for P. sp. and about 75% for D. zhanjiangensis.
The photosynthesis rate of P. sp. was most seriouly influenced during the first day of exposure to both TBTC and TPTC. Thereafter, it recovered gradually. The photosynthesis rate of D. zhanjiangensis increased slightly with time after one day exposure to TPTC, but went on decreasing under TBTC contamination. |
| Key words: Tributyltin chloride, Triphenyltin chloride, Platymonas sp., Dicrateria zhanjiangensis, Photosynthesis |
