Ca2+ effect on protoplasmic streaming in Nitella internodal cell
نویسندگان
چکیده
منابع مشابه
Protoplasmic Streaming of an Internodal Cell of Nitella Flexilis
The sudden cessation or sudden decrease in velocity of the protoplasmic streaming of Nitella flexilis is observed whenever an action potential is elicited. The action potential can be generated by an electric stimulus after its refractory period, whether the flow is at a complete standstill or on the way to recovery. The membrane potential is generally decreased more or less when the rate of fl...
متن کاملEffect of Light on Sodium Influx, Membrane Potential, and Protoplasmic Streaming in Nitella.
The -,vay in which the various activities of a cell relate to the level of available energy can conveniently be studied in photosynthetic cells of size large enough to permit measurements on individual cells. Internodal cells of the Characeae approach ideality for such a purpose in that they are, to a good approximation, right circular cylinders of macroscopic dimensions. Moreover, a certain in...
متن کاملStructural Characteristics of Developing Nitella Internodal Cell Walls
The Nilella intermodal cell is formed by a division of the segment cell, the latter being a direct derivative of the shoot apical cell. The internodal cell is remarkable in that it elongates from an initial length of about 20 microns to a mature length of about 60 millimeters. The structures of the apical and segment cells, and the internodal cells in all stages of development were examined wit...
متن کاملDiffusive Promotion by Velocity Gradient of Cytoplasmic Streaming (CPS) in Nitella Internodal Cells
Cytoplasmic streaming (CPS) is well known to assist the movement of nutrients, organelles and genetic material by transporting all of the cytoplasmic contents of a cell. CPS is generated by motility organelles that are driven by motor proteins near a membrane surface, where the CPS has been found to have a flat velocity profile in the flow field according to the sliding theory. There is a consi...
متن کاملThe Effect of Auxins on Protoplasmic Streaming. Iii
1. A new method is described which gives a continuous record of the absolute rate of protoplasmic streaming in epidermal cells of the Avena coleoptile. 2. With this method a study was made of the influence of malate and iodoacetate on streaming velocity, in order to make correlations with the previously established effects of these substances on growth and respiration. 3. In the presence of opt...
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ژورنال
عنوان ژورنال: Biophysical Journal
سال: 1993
ISSN: 0006-3495
DOI: 10.1016/s0006-3495(93)81355-9