Effects of combinational treatment with ethephon and indole-3-butyric acid on adventitious rooting of Pinus thunbergii cuttings

Yasuhiro Mori, Fumihiko Miyahara, Yuji Tsutsumi, Ryuichiro Kondo

研究成果: ジャーナルへの寄稿学術誌査読

17 被引用数 (Scopus)

抄録

Adventitious rooting is essential for cutting propagation of pine wilt-resistant Pinus thunbergii. To examine a variety of adventitious rooting potentials among donor plants, cuttings were taken from 31 seedlings within a half-sib family. Rooting abilities of cuttings from each seedling ranged from 0 to 100%. When 11 ortets and 11 ramets (clonally propagated from each ortet) were used as donor plants, there was a positive correlation between rooting abilities of cuttings from ortets and ramets, suggesting that adventitious rooting is dependent on genetic factors in the donor plants. To promote adventitious rooting of cuttings by hormonal treatment, we examined the effect of soaking time in Oxyberon (19.7 mM indole-3-butyric acid (IBA) solution) on rooting. Ten minutes was the best soaking time for rooted cuttings to produce more adventitious roots without impairing normal growth. When cuttings were soaked in Ethrel diluent (69.2 μM ethephon) for 24 h before soaking in Oxyberon for 10 min, a significantly higher rooting ability was observed than those soaked in Oxyberon alone. Ethrel on its own barely affected rooting ability. The positive effect of the combinational treatment was confirmed in a similar experiment using authentic ethephon and IBA instead of Ethrel and Oxyberon. When cuttings were soaked in a mixture of ethephon and silver thiosulfate (STS), an ethylene action inhibitor, before IBA-soaking, the effect was partially diminished compared with combinational treatment without STS. These findings suggest that ethylene action caused by ethephon treatment promotes IBA-mediated adventitious rooting of P. thunbergii cuttings.

本文言語英語
ページ(範囲)271-278
ページ数8
ジャーナルPlant Growth Regulation
63
3
DOI
出版ステータス出版済み - 4月 2011

!!!All Science Journal Classification (ASJC) codes

  • 生理学
  • 農業および作物学
  • 植物科学

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