Shigetoshi Suzuki’s research while affiliated with Tokyo University of Agriculture and other places

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Publications (4)


Effect of Low Temperatures Applied to Seeds and Seedlings on Flowering of Lathyrus latifolius L
  • Article

January 2007

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9 Reads

Horticultural Research (Japan)

Yasuhiko Koike

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Noritsugu Kouyama

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Ayumi Yoshii

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[...]

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Hideo Imanishi

Effect of Growing Temperatures on Scaly Rhizome Formation of Achimenes

May 2005

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23 Reads

Acta Horticulturae

Scaly rhizome formation in Achimenes cv. Primadonna was investigated under controlled conditions in growth chambers. When plants from seeds were grown at 30-25°C (day/night), scaly rhizome formation was delayed. Plants from cuttings grown at 30-25°C showed a delay in scaly rhizome formation. Also, in plants grown from rhizomes, the number of scaly rhizomes and fresh weight of scaly rhizome were lowest at 30-25°C. These results indicate that high temperature at 30-25°C retards the scaly rhizome formation in Achimenes. INTRODUCTION The genus Achimenes belongs to the Gesneriaceae. About 25 species are native to Mexico, Brazil, northern Argentina and Jamaica. Achimenes are herbaceous plants having rhizomes that develop at the base of the shoots and on underground stolons at the end of the growing season. Deutch (1974) reported that bulblet (= scaly rhizome) formation in Achimenes cuttings was inhibited by long-day treatment such as continuous illumination. However, in other reports, rhizome formation was not significantly affected by daylength or by growing temperature of 17, 21 or 25°C (Vlahos, 1990a, b). It is uncertain whether higher temperatures affect rhizome formation. Scaly rhizome formation of Achimenes was investigated at various growing temperatures in plants raised from seeds, cuttings or scaly rhizomes.



Effect of Photoperiod on the Flowering of Lathyrus latifolius L

November 2000

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21 Reads

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3 Citations

Engei Gakkai zasshi

The effect of photoperiod on the flowering of Lathyrus latifolius L,. was studied by using 'Pink Pearl','Red Pearl' and 'White pearl'. Plants were exposed to an 8-hr photoperiod under natural daylight. The photoperiod was extended with 60W incandescent lamps to give an 8- to 24-hrs day. Under photoperiods at and above 14-hr, flower buds were initiated; the days from bud formation to flowering were shortened in plants grown under a 16-hr photoperiod or if the night was interrupted for 2 hr beginning at midnight. Earlier sowing resulted in earlier flowering, if the plants were subjected to a 16- hr photoperiod.