カイネチンに関する研究(第一報)

Abstract

Kinetin was disocvered as a cell-division promoting substance 11 years ago. This substance has many interesting physiological activities. In this paper, three interesting activities of kinetin were described: 1) The first activity is a stimulating action upon the greenleaves. 2) The second action is a stimulating effect of flowering of various plants. 3) The third activity is a promotion of seed-germination of Tobaccum. The use of kinetin in agriculture has become feasible. All the plant species so far tested (Pisum sativum L, Zea mays L, Spinacia oleraceal etc.) showed the frost hardiness with kinetin. The plants that acquired the frost-hardiness also acquired a resistance to the agricultural chemicals. A study was also made to investigate the relationship between the chemical structure and the kinetin-activity. For example, the changes of activity due to the replacement of furane ring in kinetin by an aromatic or heterocyclic ring or an alkyl group were investigated. The very interesting relationship was found. It is very important problem wheather kinetin exists in the nature or not. This still remains for future research to elucidate.