Electrical Control of Organic Polarity in the Egg of Fucus
Electrical Control of Organic Polarity in the Egg of Fucus
复制标题
墨角藻卵有机极性的电控制
DOI：
10.1086/333252
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发表时间：
1923
影响因子：
--
通讯作者：
E. J. Lund
中科院分区：
文献类型：
--
作者：
E. J. Lund
1.墨角藻卵的极性可以通过对卵施加电位差来确定。显然，这是动物或植物中第一个通过电流控制极性的蛋。墨角藻卵在完全黑暗中对电流的反应类似于它对光的反应。2.给出了一种测量P. D的方法。通过一个鸡蛋，这个鸡蛋被放置在电流中，电流在恒定横截面的海水流中流动。3.施加到蛋的相对侧的电势的大小，其刚好能够引起取向（阈值P.D.）。墨角藻卵细胞质对称轴的电压为0.025±0.002伏。4.这个门槛PD是明确的，似乎不涉及任何显着的抑制作用（延迟）的增长。一个警察。0.036伏的电压确实显示出对卵裂的抑制作用（延迟）。5.某种电化学极性的建立可能是形态极性发展的基本相关条件，因为墨角藻卵中决定形态极性的生理机制可以通过对卵施加外部来源的电位差来控制和指导。
1. Polarity of the egg of Fucus can definitely be determined by applying a difference of electrical potential to the egg. Apparently this is the first egg, among either animals or plants, the polarity of which has been controlled by means of an electric current. The response of the Fucus egg to the electric current in total darkness is similar to its response to light. 2. A method is given by which it is possible to measure the P.D. across a single egg which is placed in an electric current flowing in a stream of sea water of constant cross-section. 3. The magnitude of the electrical potential applied to opposite sides of an egg, which is just able to cause orientation (threshold P.D.) of the axis of symmetry of the protoplasm of the Fucus egg, is 0.025±0.002 volts. 4. This threshold P.D. is definite and does not appear to involve any marked inhibitory effect (delay) upon growth. A P.D. of 0.036 volts applied to the egg does show an inhibitory effect (delay) upon cleavage. 5. The establishment of an electrochemical polarity of some sort may possibly be a fundamentally associated condition for the development of morphological polarity, because the physiological mechanism in the Fucus egg which determines morphological polarity can be controlled and directed by the application to the egg of a difference of electrical potential of external origin.