デンドロビウム・ノビルに於ける未熟〓よりの種子の発芽とその後の生長
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概要
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1. Morphological observations on ovules and immature seeds in young fruits of different stages as well as experiments concerning the possibility of germination and growth of immature seeds or pods in Dendrobium nobile on the media containing onion-and yeast-extract and on the Knudson's solution. 2. Ovary starts to enlarge rapidly from about one half month after pollination, and reaches a mature size in about four months; embryos develop rapidly two to four months after pollination. The outline of the seeds is completed in four months and attains almost a full size in six months. 3. Immature seeds from four, five and six months after pollination germinate and grow well. Growth of immature seeds of six month age exceeds even that of mature ones of nine months age. 4. An addition of onion extract to the sugar medium produces vigorous seedlings with leaves and roots, although somewhat yellowish, when compared with that on Knudson's C solution. On yeast extract medium, with sugar, intermediate growth was observed. 5. Slices of immature pods from one month to three months and a half after pollination were cultured. The cultures were unsuccessful, in one tube of 0.8 per cent yeast extract with 2% sucrose in which the immature pods of three months age were cultivated, healthy seedlings were obtained. 6. As the results of the present culture experiments it was revealed that the use of immature seeds from young pod of four months after pollination is practical for Dendrobium (nobile strain) cultures.
- 京都府立大学の論文
- 1955-09-01
著者
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