The effects of gibberellin concentration, treatment interval and commencement timing on the development of tubers and inflorescences in Chinese Yam (Dioscorea oppositifolia L.) 'Ichoimo' plant

Y. Yoshida, A. Ichikawa, M. Takahashi, H. Takahashi, H. Kanda, K. Kanahama

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Citation (Scopus)

    Abstract

    The effects of gibberellic acid (GA3) concentration, treatment interval, and treatment commencement timing on the development of the main vegetative shoots, aerial and new tubers, and inflorescences (spikes) were investigated in Chinese yam (Dioscorea oppositifolia L.) 'Ichoimo'. Foliar applications of 25, 50, 100, and 200 mg L-1 of GA3 (GA3 25, GA3 50, GA3 100, and GA3 200) was carried out at 1-week intervals after shoot emergence, and the subsequent foliar applications of GA3 (100 mg L-1) were carried out at 1-, 2-, and 4-week (GA3 E1W, GA3 E2W, and GA3 E4W) intervals after shoot emergence. The last foliar application of GA3 (100 mg L-1) was carried out at 1, 2, 4, and 8 weeks (GA3 A1W, GA3 A2W, GA3 A4W, and GA3 A8W) after emergence. Following the above applications, the final fresh weight of the aerial tubers was observed to be higher in the control plants than in both the GA3 25- to GA3 200- and GA 3 E1W- to GA3 E4W-treated plants. However, the GA 3 25- to GA3 100- and GA3 E1W- to GA 3 E4W-treated plants produced new tubers with the highest final fresh weight. Similarly, aerial tubers with the highest final fresh weight were harvested from the control plants. These were followed by the GA3 A8W-treated plants; the GA3 A1W- to GA3 A4W-treated plants produced aerial tubers with the lowest final fresh weight. However, the GA3 A1W- to GA3 A4W-treated plants produced new tubers with the highest final fresh weight. The ratio of the development of spikes in every GA3-treated plant was slightly lower than that in the control plants.

    Original languageEnglish
    Title of host publicationProceedings of the International Symposium on Endogenous and Exogenous Plant Bioregulators
    PublisherInternational Society for Horticultural Science
    Pages269-274
    Number of pages6
    ISBN (Print)9789066056312
    DOIs
    Publication statusPublished - 2008 Jan 1
    EventInternational Symposium on Endogenous and Exogenous Plant Bioregulators - Seoul, Korea, Republic of
    Duration: 2006 Aug 132006 Aug 19

    Publication series

    NameActa Horticulturae
    Volume774
    ISSN (Print)0567-7572

    Other

    OtherInternational Symposium on Endogenous and Exogenous Plant Bioregulators
    CountryKorea, Republic of
    CitySeoul
    Period06/8/1306/8/19

    Keywords

    • Bulbils
    • Chinese yam
    • Dioscorea oppositifolia
    • Gibberellin A
    • Spike
    • Tuber

    ASJC Scopus subject areas

    • Horticulture

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