Growth and Characteristic Forms as Affected by Low-temperature Treatment of Imbibed Seeds to Priming Seeds of <i>Eustoma grandiflorum</i> ‘Reina White’

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  • Fukushima Keigo
    Hiroshima Prefectural Technology Research Institute, Agricultural Technology Research Center Graduate School of Environmental and Life Science, Okayama University
  • Kajihara Shinji
    Hiroshima Prefectural Technology Research Institute, Agricultural Technology Research Center
  • Ishikura Satoshi
    Hiroshima Prefectural Technology Research Institute, Agricultural Technology Research Center
  • Goto Tanjuro
    Graduate School of Environmental and Life Science, Okayama University

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Other Title
  • プライミング種子への吸水種子湿潤低温処理がトルコギキョウ ‘レイナホワイト’ の生育および切り花形質に及ぼす影響
  • プライミング シュシ エ ノ キュウスイ シュシ シツジュン テイオン ショリ ガ トルコギキョウ'レイナホワイト'ノ セイイク オヨビ キリバナ ケイシツ ニ オヨボス エイキョウ

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Abstract

<p>This study investigated the effects of priming and low-temperature treatment durations of imbibed seeds on the growth and characteristic forms in Eustoma grandiflorum ‘Reina white’. This experiment used primed and non-primed seeds of this cultivar. The imbibed seeds were kept for 0, 1, 3, 5, 7, and 9 weeks at 10°C after sowing under dark conditions. The germination rate of the primed seeds was greater than that of seeds unprimed with the low-temperature treatment of the imbibed seeds for 5 weeks. The emergence rate of seedlings of the primed seeds for the duration from 0 to 5 weeks was the same or reduced compared with those that had not been primed in the low-temperature treatment of imbibed seeds for 7 and 9 weeks. The sizes of the seedlings that originated from the primed seeds were larger than those that were not primed at the time of planting. The bolting, flower-budding, and flowering rates of the primed seeds were greater than those that were not primed in the low-temperature treatment of the imbibed seeds for 0 and 1 week. The flowering rates were over 90% for primed seeds that had more than 1 week of the low-temperature treatment. The growth after planting was the same when the primed seeds were exposed for more than 3 weeks to the low-temperature treatment, although the growth was the same or slower when treated for 1 week. The characteristics of cut flowers were the same when the low-temperature treatment was administered for over 3 weeks. These results showed that 3–5-week low-temperature treatment was the most suitable treatment duration for primed seeds.</p>

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