Effects of Storage Temperature and Wounding on Cytokinin Levels in Potato Tubers
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The level of butanol-soluble cytokinin in potato tubers (Solanum tuberosum L.) decreased greatly after harvest of the tubers, remained low during rest-period and then began to increase prior to the end of the period. In warm-stored tubers (25℃) the level rose faster than in cold-stored ones (4℃). On the other hand, the level of water-soluble cytokinin, which was high during the rest-period, decreased after the rest was broken. Wounding the tubers caused an increase in butanol-soluble cytokinin. The increase in cytokinin within the first 24 hr after wounding was smaller in warm-stored tubers than in cold-stored ones and was decreased with increasing storage time of the tubers. The level of water-soluble cytokinin decreased by wounding. These results suggest that water-soluble cytokinin is a storage form and that the level of butanol-soluble. cytokinin is regulated by an interconversion between the two.
- 日本植物生理学会の論文
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