Nespůrková L, Rybová R, Janácek K
Gen Physiol Biophys. 1987 Jun;6(3):263-70.
Inflow of potassium ions into the alga Hydrodictyon reticulatum is reduced in the dark, the reduction being accompanied by a change in the selectivity pattern with respect to alkali metal ions, observed in competition experiments and evaluated by the gnostic analysis as described by Kovanic. This suggests that in the light a special mechanism of potassium uptake with a characteristic selectivity is switched on. This mechanism can be also suppressed by too high (2 mmol/l) or too low (EGTA) concentration of calcium ions in the medium. Since the same applies to the light-induced alkalinization of the algal surroundings it seems that the light-induced potassium uptake is related to the light-induced alkalinization, e.g., via exchange of external potassium cations for intracellular protons.
在黑暗中，网状盘星藻（Hydrodictyon reticulatum）对钾离子的吸收减少，这种减少伴随着在竞争实验中观察到的、并按照科瓦尼克（Kovanic）所描述的认知分析进行评估的碱金属离子选择性模式的变化。这表明在光照下开启了一种具有特征性选择性的特殊钾吸收机制。该机制也会被培养基中过高（2 mmol/L）或过低（乙二醇双乙醚二胺四乙酸，EGTA）的钙离子浓度所抑制。由于同样的情况也适用于藻类周围环境的光诱导碱化，所以光诱导的钾吸收似乎与光诱导的碱化有关，例如通过外部钾阳离子与细胞内质子的交换。
