著者

高江洲 賢文 中川 恭二郎

出版者

日本雑草学会

雑誌

雑草研究 (ISSN:0372798X)

巻号頁・発行日

vol.30, no.1, pp.p51-57, 1985-05

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This study was carried out to analyse the pattern of organ formation, particularly the daughter bulb formation. 1) The scales of the mother bulb (MB) were oriented on a generic spiral, which was reached to the tops, at the phyllotaxis of 3/8. No increase of the scales was observed during the vegetative period. Radical leaves were formed on the generic spiral elongating to the tops at the phyllotaxis of 3/8. 2) One primary daughter bulb each (DB1) was generated on the axiles of both radical leaves and scales. The number of primary daughter bulbs of the scales (DBS1) was almost equal to that at the initial stage. On the other hand, the number of primary daughter bulbs of the radical leaves (DBL1) corresponded with that of the leaves because at the initial stage a daughter bulb was transformed into a flower bud. These results suggest that the morphogenesis of the flower bud may be affected by intrinsic factors of the plants. 3) DB1 was formed most rapidly on the middle nodes, where the phyllotaxis was changed from scales to radical leaves. DBL1 formation was acropetal and DBS1 formation was basipetal. These findings suggested that the differences in the formation of DB1 may be one of the effective methods for reproductive strategy. 4) Some scales of the DB1 (SDB1) did not change but other developed to radical leaves of the DB1 (LDB1), indicating that DB1 can be come adapted to various environments. This plasticity may be an important character for this species. 5) Secondary daughter bulbs (DB2) were formed from the basal nodes to the top ones at the axile of DBI regardless of the type of leaves. A large number of DB2 were generated on the middle nodes of MB. 6) MB produced many adventitious roots at the base, which were fibrous in the early stage but become enlarged and formed root tubers subsequently.