Effects of Alternating Night Temperature and Cytokinin Application on the Activity of Enzymes of Sucrose Metabolism in Leaves, Young Shoots and Petals of Roses
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概要
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Different aspects of growth and development of rose plants grown at constant high or low night temperatures in association with the activity of enzymes of sucrose metabolism and effects of cytokinin application were previously described (Khayat and Zieslin 1987a). It has also been shown that growth and flowering were affected when rose plants were grown at night temperatures of 18℃ alternating every 2 h with 12℃. Data on the effects of alternating night-temperature and application of cytokinin on the activity of those enzymes in various tissues of rose plants, in comparison to average activity at constant high and low temperatures are described in the present report. The results showed that the activities of acid invertase in leaves and young shoots and of sucrose synthase in petals of rose plants grown at alternating night temperatures were similar to the average activity. The alternating temperatures reduced the activity of acid invertase in petals, slightly promoted the activity of sucrose-phosphate synthase in the leaves and enhanced the activity of sucrose synthase in young shoots. Application of benzyl adenine to an axillary bud in plants grown at alternating temperature caused a 2-fold increase in the activity of sucrose synthase and reduced the activity of acid invertase in young shoots and promoted the activity of sucrose-phosphate synthase and acidic invertase in leaves as compared with the average activity in plants treated with benzyladenine and grown at constant high and low temperatures. The relevance of these phenomena to flower formation in roses is discussed.
- 日本植物生理学会の論文
著者
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Zieslin N
The Hebrew University Of Jerusalem Faculty Of Agriculture
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Khayat E
The Hebrew University of Jerusalem, Faculty of Agriculture
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Khayat E
Rutgers Univ. Nj Usa