Physiological and Ecological Studies in Environmental Adaptation of Plants. : III. Altitudinal Variation in Some Characters of Cytochrome Oxidase Isozymes in Polygonum cuspidatum Sieb. et Zucc.

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The number and the activity of cytochrome oxidase isozymes in Polygonum cuspidatum Sieb. et Zucc. were investigated on the mature plants growing in a few different altitudes and on these seedlings grown under various levels of a constant temperature. The number of the isozymes in the mature plants was 3 at low altitude and 2 at high altitude, but that in the plants transplanted from high to low altitude was 4. The number and the activity of the isozymes in the seedlings derived from the plants in high altitude and from the transplanted plants were remarkablly changed by growth temperature for them and staining temperature for the isozymes. Especially, the seedlings from high altitude had a few specific isozymes which were inactivated at a high staining temperature but were activated at a low staining one. Genetic difference among the seedlings with the altitudinal difference in their parent plants' habitats seems to be detected on a regulation ability of cytochrome oxidase activity rather than on the isozyme composition, but the difference seems to be undeveloped in the mature plants.
信州大学理学部の論文