Journal of Ginseng Research

The Korean Society of Ginseng (고려인삼학회)
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Gibberellin Effects on Inflorescence Development, Bud Dormancy and Root Development in North American Ginseng

  • Rolston, L.J. (epartment of Plant Agriculture, Division of Horticultural Science, University of Guelph, Ontatrio, Canada, NIG 2W1) ;
  • Proctor, J.T.A. (epartment of Plant Agriculture, Division of Horticultural Science, University of Guelph, Ontatrio, Canada, NIG 2W1) ;
  • Fletcher, R.A. (Department of Environment Biology, University of Guelph, Ontatrio, Canada, NIG 2W1) ;
  • Murr, D.P. (Department of Plant Agriculture, Division of Horticultural Science, University of Guelph, Ontatrio, Canada, NIG 2W1)
  • Published : 2002.03.01
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Abstract

Gibberellic acid (GA) was applied to field-grown 3-year-old North American ginseng (Panax quinqueiolius L.) between 1 and 4 times, before and during bloom in 1999. Applications of both GA$_3$ and GA$\sub$4+7/ four times (x4) to the developing inflorescences increased maximum pedicel length, and seed head diameter and height. Treatment with GA$\sub$4+7/ increased mean and total root fresh weight linearly, whereas those treated with GA$_3$ did not show similar increases. Both GA$_3$ and GA$\sub$4+7/ at 50, 100 and 200 mg L$\^$-1/ (x4) increased the incidence of breaking of dormancy of perennating buds with GA$_3$ being twice as effective as GA$\sub$4+7/. Both GA$_3$ and GA$\sub$4+7/ treatments resulted in an increased number of new bud initials forming per root, with the number of new initials per root increased two-fold by the GA$_3$ sprays compared to GA$\sub$4+7/.

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References

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