Cichorium intybus の花茎組織培養における 日長の花芽形成におよぼす影響
1966 年 79 巻 932-933 号 p. 119-123
詳細
1966 年 79 巻 932-933 号 p. 119-123
Effects of photoperiodic conditions leading to the formation of flowers on sections excised from the internodes of flower stalks were studied. (The results obtained are summarized in Table 1.) Flower formation was induced by long days, whereas short days had little effect. When culrtures were placed in darkness for more than two weeks, the tissues almost lost their ability to form flowers. The tissues were most responsive to photoperiodic treatments during the second week of culture. Long day conditions induced flower bud formation in 100% of the sections during the third and fourth weeks. When the explants were kept for periods of up to ten weeks or more, about 70% of those under short day conditions produced flowers. However, the number of flower buds remained small in comparison with similar cultures held under long day conditions (Table 2). The significance of the results obtained for the understanding of the roles of long days, short days and continuous darkness on the process of flower formation is discussed.
