ISSN:
1615-6102
Keywords:
Centrifuge microscopy
;
Cytoplasmic streaming
;
Far-red light
;
Mesophyll cells
;
Red light
;
Vallisneria
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Summary Using a centrifuge microscope with stroboscopic illumination, we examined the effects of light irradiation on the passive movement of chloroplasts in dark-adapted mesophyll cells ofVallisneria gigantea. While irradiation with red light accelerates the passive gliding of chloroplasts produced by centrifugal force, irradiation with far-red light negates this effect. Irradiation with blue light does not accelerate the passive gliding, while red light is completely effective even in the presence of 3-(3,4-dichlorophenyl)-1,1-dimethylurea, an inhibitor of photosynthesis. An apparently active movement of chloroplasts can be induced by irradiation with red or blue light only in the presence of the far-red light-absorbing form of phytochrome. The significance of the reaction in the light with respect to the regulation of cytoplasmic streaming is discussed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01666261
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