Tag Archives: jasmonate

39–44 S. K. Kim, J. T. Kim, S. W. Jang, S. C. Lee, B. H. Lee and I. J. Lee
Exogenous effect of gibberellins and jasmonate on tuber enlargement of Dioscorea opposita
Abstract |

Exogenous effect of gibberellins and jasmonate on tuber enlargement of Dioscorea opposita

S. K. Kim¹, J. T. Kim², S. W. Jang³, S. C. Lee², B. H. Lee¹ and I. J. Lee²

¹Institute for Bioresources Research, Gyeongbuk Provincial Agricultural Technology Administration, Andong 760-891, Korea
²Division of Plant Biosciences, Kyungpook National University, Daegu 702-701, Korea; e-mail: ijlee@knu.ac.kr
³Korea Tobacco and Ginseng Central Research Institute, Daejon 305-805, Korea
The authors (S. K. Kim and J. T. Kim) have equally contributed to this study.

Abstract:

We have examined the single and combinational effect of gibberellins (GA3, GA4+7) and jasmonic acid (JA) on enlargement of Chinese yam tubers in field. In a single treatment, gibberellin promoted the tuber enlargement by one time application, whereas the lowest concentration (100ppm) led to the highest tuber yield rather than accumulative application. The effect of GA4+7 enhancing tuber yield was only recognised at the highest concentration by a single treatment. Tuber weight was decreased at the highest JA concentration, otherwise the lowest concentration of JA (5 ppm) significantly promoted the tuber weight by a single treatment (FS1). The combination of GA 50 ppm plus JA 5ppm enhanced remarkably the tuber weight by a single treatment (FS1). It is suggested that the combined treatment of yam plants with both gibberellic acid and jasmonic acid has promoted tuber yield.

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