Cytoplasmic Streaming in Plant Cells and Its Relation to the Cytoskeleton
The known patterns and rates of cytoplasmic streaming in plant cells as well as the investigations on plant cells with laser Doppler spectroscopy will be reviewed briefly. Our current knowledge of the molecules involved in the movement of cytoplasm and/or saltation of particles in cytoplasm and their possible location in cells will be described.
The classical systems often used in the study of streaming were selected as particularly suitable for light-beating laser spectroscopic investigations. These are (1) the giant fresh-water alga, Nitella, (2) the giant marine alga, Acetabularia, and (3) germinating pollen grains of Amaryllis. All of these cells are large, easily cultured and exhibit rapid transport of various sized particles in their cytoplasm. Furthermore, a body of knowledge has been accumulated describing the morphology, physiology, and biochemistry as well as the motile behavior of these cells.
Several theories that have been proposed to account for the rotational streaming observed in Nitella will be discussed. Some challenging experiments will be proposed to study these cells employing the laser Doppler spectroscopic techniques.
KeywordsPollen Tube Subcortical Region Cytoplasmic Streaming Internodal Cell Large Central Vacuole
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