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2018 Vol.63, Issue 3 Preview Page

Original Research Article

Effects of Paclobutrazol and Prohexadione-Ca on Seed yield, and Content of Oils and Gibberellin in Flax Grown in a Greenhouse
Sang-Kuk Kim1*
,
Chae-Min Han1
,
Jong-Hee Shin1
,
Tae-Young Kwon1
1Division of Crop Breeding, Gyeongsangbuk-do Provincial Agricultural Research & Extension Services
*Corresponding Author
30 September 2018. pp. 265-271
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Abstract

We investigated the effect of paclobutrazol (PB) and prohexadione-Ca (PC) on seed yield, and the content of oils and endogenous gibberellin in flax grown in a greenhouse. Flax seedlings were cultivated in a greenhouse with average ambient temperature ranging from 35℃ to 38℃ during the growing period, and then PB and PC were applied on the leaves. The height of flax plants was reduced significantly by the foliar application of PB and PC. The highest ripening seed rate recorded was 94.5% with 2000 ppm PC; a 10.3% increase compared with that of the control. Both PB and PC markedly increased the fructification of flax seed. The application of two plant growth retardants resulted in higher seed production in flax seedlings grown in open field than in those grown in a greenhouse. The highest oil content was observed in flax treated with PC, whereas, the lowest oil content was observed in flax treated with PB. The oil content and ratio of unsaturated fatty acids were higher in flax seedlings grown in greenhouse than in those grown in open field. The level of two endogenous bioactive gibberellins (GA1 and GA4) in flax seeds decreased with the application of PB and PC. The flax plants treated with PB and PC presented higher secoisolariciresinol diglucoside content than that of the control. The optimal concentration of PC was found to be 2000 ppm. In conclusion, the foliar application of 2000 ppm PC might be useful in increasing oil content and seed production in flax plants.

Keywords
flax
gibberellin
paclobutrazol
prohexadione-ca
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Information
  • Publisher :The Korean Society of Crop Science
  • Publisher(Ko) :한국작물학회
  • Journal Title :The Korean Journal of Crop Science
  • Journal Title(Ko) :한국작물학회지
  • Volume : 63
  • No :3
  • Pages :265-271
  • Received Date : 2018-04-18
  • Revised Date : 2018-08-24
  • Accepted Date : 2018-09-03
  • DOI :https://doi.org/10.7740/kjcs.2018.63.3.265
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