TY - GEN
T1 - 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
AU - Yoshida, Y.
AU - Ichikawa, A.
AU - Takahashi, M.
AU - Takahashi, H.
AU - Kanda, H.
AU - Kanahama, K.
PY - 2008/1/1
Y1 - 2008/1/1
N2 - 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.
AB - 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.
KW - Bulbils
KW - Chinese yam
KW - Dioscorea oppositifolia
KW - Gibberellin A
KW - Spike
KW - Tuber
UR - http://www.scopus.com/inward/record.url?scp=70450206204&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=70450206204&partnerID=8YFLogxK
U2 - 10.17660/ActaHortic.2008.774.35
DO - 10.17660/ActaHortic.2008.774.35
M3 - Conference contribution
AN - SCOPUS:70450206204
SN - 9789066056312
T3 - Acta Horticulturae
SP - 269
EP - 274
BT - Proceedings of the International Symposium on Endogenous and Exogenous Plant Bioregulators
PB - International Society for Horticultural Science
T2 - International Symposium on Endogenous and Exogenous Plant Bioregulators
Y2 - 13 August 2006 through 19 August 2006
ER -