Variations in the geotropic sensitivity of germinating Funaria spores in response to some external influences |
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Authors: | LUCIE KOFLER JACQUELINE DUTEL FRANÇOISE NURIT |
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Institution: | Institut de Botanique, Grenoble |
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Abstract: | Experiments on the germination of the spores of Funaria have established the following. - 1.
Some growth substances such as vitamins slightly promote the geotropic response of germinating spores in darkness. - 2.
Glucose, even in concentrations as low as 10 mg./L, strongly stimulates the geotropic response. - 3.
Light (at an intensity of 1000 lux and more) strongly inhibits the geotropic response. This effect is probably phototonic and can be partly counteracted by glucose. - 4.
The nature of the phototropic and geotropic reactions of chloronema is variable, and depends to a certain extent on environmental influences.
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