Effects of pH on the growth rate, motility and photosynthesis in Euglena gracilis
Effects of pH on the growth rate, motility and photosynthesis in Euglena gracilis
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DOI：
10.1007/bf02818001
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发表时间：
2001-01-01
影响因子：
2.6
通讯作者：
Ekelund, NGA
中科院分区：
文献类型：
--
作者：
Danilov, RA;Ekelund, NGA
通过7 d的培养，研究了pH 3-10对纤细裸藻（Euglena gracilis）生长、运动和光合作用的影响。细胞在pH 8下不能存活，在pH 7下检测到最高生长速率。运动性遵循与生长率相似的模式。光合响应曲线被证明是相同的类型在整个pH范围内。高呼吸是细胞生长在pH 5和6的特征，最低的一个在7。在高pH值和低pH值下，发现呼吸更活跃，这可以被认为是对质子胁迫的保护性反应。氰化钾不能完全抑制呼吸。光合作用是最有效的pH值为6，较低和较高的pH值降低光合效率。pH值对生长速率的影响大于光合作用。
The influence of pH 3-10 on the growth, motility and photosynthesis in Euglena gracilis was demonstrated during a 7-d cultivation. The cells did not survive at pH 8, highest growth rate being detected at pH 7. Motility followed a similar pattern as growth rate. Photosynthetic response curves were shown to be of the same type over the whole pH range. High respiration was characteristic for cells grown at pH 5 and 6, the lowest one at 7. At high and also at low pH more active respiration was found which can be considered as a protective response on proton stress. Respiration was not completely inhibited with potassium cyanide. Photosynthesis was the most effective at pH 6; lower and higher pH decreased photosynthetic efficiency. pH affected more the growth rate than the photosynthesis.