Some Observations of Protoplasmic Streaming in Acetabularia
نویسندگان
چکیده
منابع مشابه
Some Properties of Protoplasmic Gels
The chloroplast of Spirogyra is a long, spirally coiled ribbon which may contract to form a short, nearly straight rod. This happens under natural conditions and it can also be produced by a variety of inorganic salts and by some organic substances. It also occurs when the chloroplast is freed by centrifugal force from the clear peripheral protoplasm which is in contact with the cellulose wall....
متن کاملSome Aspects of Protoplasmic Motion
In Nitella the protoplasm forms a layer about 15 microns thick surrounding a large central vacuole. The outer part of the protoplasm is a gel, the inner layer is a sol which is in continual motion travelling the entire length of the cell in opposite directions on opposite sides and thus making a complete circuit (cyclosis). If we have a cell devoid of motion and if we regard the protoplasm in a...
متن کاملProtoplasmic 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 کاملThe Effect of Sudden Changes of Temperature on Protoplasmic Streaming
A sudden fall of temperature of 15 degrees to 20 degrees causes a complete cessation of the protoplasmic streaming in Nitella. The recovery of the normal rate follows a definite course and the time of recovery is dependent on the temperature. Evidence is adduced to show that the inhibition of streaming is due to a physical phenomenon.
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: Shokubutsugaku Zasshi
سال: 1966
ISSN: 0006-808X
DOI: 10.15281/jplantres1887.79.706