異なった高度で生育したイタドリの種子発芽

概要

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The seeds of Polygonum Reynoutria Makino were collected early in October from the tableland of Tadeshina(1500m above sea-level)and from Matsumoto(600m above sea level). At various temperatures, the germination rate of the seeds from Tadeshina was always higher than that from Matsumoto, and, especially in the temperature below 20℃, it was relatively higher. The germination rate of the seeds from Matsumoto which was expected to be low was found to be almost the same as that from Tadeshina after the cold treatment at 5℃. After 10 days storage at room temperature, both groups of seeds began to germinate. After a time, in the seeds from Matsumoto, the germination rate continued to increase slowly for about 150 days, rapidly for about 30 days, and then kept a constant level. On the other hand, almost all seeds from Tadeshina, after a constant increase of the germination rate for about 60 days, began to germinate. It is suggested that the period of seed dormancy of Polygonum Reynoutria Makino is shorter in seeds from the high altitude than those from the low altitude, and that the seeds from Tadeshina germinate in the early spring if chilled.
日本生態学会の論文
1970-02-01