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期 刊 ：生态学报 2008年 28卷 6期 页码：2581~2581～2586

关键词：磷酸盐胁迫；鹿角珊瑚；Fv/Fm值；共生虫黄藻密度；

Keywords:phosphate stress, Acroporidae, Fv/Fm, the density of the symbiotic algae,

摘 要 ：以佳丽鹿角珊瑚（Acropora pulchra）和多孔鹿角珊瑚（Acropora millepora）两种造礁石珊瑚为材料研究磷酸盐浓度对共生虫黄藻光合作用的影响。研究表明，佳丽鹿角珊瑚（A. pulchra）和多孔鹿角珊瑚（A. millepora）在对照组磷酸盐浓度下，共生虫黄藻的叶绿素荧光参数Fv/Fm值处于稳定状态，在15μmol/L和30μmol/L磷酸盐浓度下，虫黄藻的Fv/Fm值很快受到抑制，分别经过2d和5d开始慢慢恢复，但是最终只能恢复到比对照组较低的水平。同时两种珊瑚的共生虫黄藻密度也有所降低，尤其佳丽鹿角珊瑚（A. pulchra）降低更加明显，15μmol/L和30μmol/L浓度下共生虫黄藻密度分别比对照组下降低5.59%和1469%。因此, 佳丽鹿角珊瑚（A. pulchra）和多孔鹿角珊瑚（A. millepora）最大可以忍受30μmol/L的磷酸盐浓度，但是在30μmol/L浓度的耐受范围内，随着磷酸盐浓度的不断提高，珊瑚共生虫黄藻Fv/Fm值显著下降，珊瑚共生虫黄藻密度显著降低。

Abstract:Two spieces of Acropora corals (A. pulchra and A. millepora)were used to study the effects of phosphate stress on the photosynthesis of symbiotic algae. The Fv/Fm of the symbiotic algae was stable at the control level of phosphate concentration, but was depressed at under 15μmol/L and 30μmol/L of phosphate during the initial culture state compared with the control, and then increased after 2 and 5 days respectively,but to lower levels than that of the control. The density of the symbiotic algae at 15μmol/L and 30μmol/L concentration 5.59% and 14.69%. The symbiotic algae of A. pulchra and A. millepora were able tolerate phosphate concentration <30 μmol/L, but their Fv/Fm and density were reduced significantly.

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