SUCCESSIVE PROCESSES INVOLVED IN THE GERMINATION RESPONSE OF NASTURTIUM SEEDS

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概要

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• 1. The seeds of Nasturtium palustre DC. do not germinate. either in the light or darkness, at various constant temperatures, but require for their full germination a certain period of a low temperature (5°) applied immediately after light irradiation. These results indicate the existance of at least two processes, a light-dependent process and a low temperature-requiring process, in the initiation of germination of Nasturtium seeds. Experimental evidence indicated further that the light exposure causes two different processes in the seed germination. 2. When a dark period at 23° was inserted between the light irradiation and the low temperature treatment the germination was suppressed. The inhibitory effect of the inserted dark period at 23° was eliminated by a short irradiation during the darkness (light-break). 3. Prolonged exposure of Nasturtium seeds to any concentration of gibberellin brought about no germination when exposure was given in complete darkness. The germination was proinoted only when light irradiation was applied to the seeds. A short application of gibberellin at a fairly high concentration was, however, remarkably effective for the germinatlon even in the darkness, and the germination was inhibited as the gibberellin application was lengthened. It was considered that gibberellin could substitute for the combitled effect of light irradiation and low temperature treatment to induce the germination of Nasturtium seeds, and that gibberellin was inhibitive toward the reactions following the above treatments which induced the germination.

• 日本植物生理学会の論文

著者

• Fujii Tadashi

  Botanical Institute Faculty Of Science Tokyo University Of Education

• Isikawa Sigeo

  Botanical Institute Faculty Of Science Tokyo University Of Education

関連論文

• PHOTOCONTROL AND TEMPERATURE DEPENDENCE OF GERMINATION OF RUMEX SEEDS
• INHIBITORY EFFECT OF 5-BROMOURACIL AND 5-FLLTOROURACIL ON PHOTOPERIODICALLY INDUCED GERMINATION OF ERAGROSTIS SEED
• REQUIREMENT OF LOW TEMPERATURE TREATMENT FOLLOWING ILLUMINATION IN THE GERMINATION OF SEED OF ELSHOLTZIA
• ON THE ANAEROBIC PROCESS INVOLVED IN THE PHOTOPERIODICALLY INDUCED GERMINATION OF ERAGROSTIS SEED
• SUCCESSIVE PROCESSES INVOLVED IN THE GERMINATION RESPONSE OF NASTURTIUM SEEDS

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