Studies on the, Comparative Physiology of Chara Australis 1. Growth Pattern and Gross Cytology of the Internodal Oell

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Abstract
The growth of the internodal cell and its parts appears to be allometric. Two growth phases are recognized, an exponential phase in the young cells followed by a linear phase during which the internode expands by up to 200 mm in length. In the exponential phase the cytoplasm to vacuole ratio declines from a very high value to about 0�04--0�06 and then remains constant throughout the linear phase. In the linear phase the structure of the protoplast, at the light.microscope level, is similar for all cells; a unit volume of the protoplast appears similar in cells from 10 to 200 rum in length.

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