河口浮游硅藻Skeletonema　costatum光合作用动力学及生理生态学特性

Photosynthesis Kinetic and Physioecological Characteristics of Estuarine Diatom Skeletonema costatum

在实验室中，模拟河口自然条件、培养浮游硅藻Ｓｋｅｌｅｔｏｎｅｍａｃｏｓｔａｔｕｍ、测定各种光合作用动力学、生理生态学特征参数。结果包括：光合作用与辐照关系、光合作用能力、光合作用最大放氧量、光能利用率、光需要量、闪光光合产量、光合作用单位大小、光反应最短反应转换时间值以及藻类细胞的捕光潜能等，分析了主要参数的意义。

Estuarine planktonic diatom Skeletonema costatum culturing in lab was used to measure photosynthetic kinetic and physioecological characteristics(salinity 14%,). This paper introduced the measurement and analysis methods in detail and gave the results which cover photosynthesis-irradiance relation(P-I curve), photosynthetic maximun oxygen yeild (Pmax) ,the oxygen flash yeild, the quantum efficiency of photosynthesis, photosynthetic unit size (PUS o2 ), the minimal turnover time in photosynthesis and so on. In the main data the quantum efficiency of skeletollema costatUIn is 33 umole Quanke/μmoleO2, which is 4 folds of the value of theory and PUSo2 is 2650.7 moleChla·moleO2. F-1 under light intensity 600μE. m-2's-1. The results also show the turnover time is 43.3 ms under light saturation.