培地温を制御したロックウール耕におけるガーベラの生育・開花と光合成, 水ポテンシャルの計測  [in Japanese] Growth and Flowering of Gerbera Plants Grown on Temperature-Regulated Rockwool Medium in Relation to Photosynthesis and Water Potentials  [in Japanese]

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Abstract

19~23℃での培地温制御がガーベラ (<I>Gerbera hybrida</I> Hort.)'ニニ'の生育・開花に及ぼす影響について, 葉の水分状態および光合成速度ならびに乾物の分配と蓄積の観点から検討した.クラウン (短縮茎) 当たりに着生した花序数は1.8~2.0で, 実験期間中を通じて安定しており処理による差は認められなかった.しかし, 夏季の冷却あるいは冬季の加温といった培地温制御は, 新たに形成されるクラウンの分枝数を増加させることにより切り花収量を増加させると考えられた.培地冷却は, 夏季の昼間の水ストレスを軽減し, その結果気孔コンダクタンスが維持されて光合成速度が高く保たれ, このことがクラウンへの乾物蓄積を促したものと考えられた.一方, 冬季の培地加温は根への乾物蓄積を抑制した.夏季の冷却と冬季の加温は切り花収量に関して, 相加的な結果をもたらさなかった.

The effects of regulation of medium temperature at 19-23°C on the growth and flowering of <I>Gerbera hybrida</I> Hort. 'Nini' were investigated in relation to leaf water potential, photosynthesis and dry matter distribution. The number of inflorescences developed per crown was 1.8-2.0 and was almost constant in all temperature regimes throughout the experiment. The increase in the number of inflorescences caused by regulation of medium temperature was attributed to an increase in the number of newly formed crowns, which was observed in plants grown on cooled medium in summer and/or heated medium in winter. The water stress during the daytime was reduced by the cooling of the medium in summer and consequent high stomatal conductance resulted in an increased photosynthetic rate, which presumably facilitated the accumulation of dry matter in the crown. On the other hand, heating of the medium inhibited the accumulation of dry matter in roots. The combination of medium cooling in summer and heating in winter did not have any additive effects on cut flower yield.

Journal

  • Shokubutsu Kojo Gakkaishi

    Shokubutsu Kojo Gakkaishi 12(4), 248-253, 2000-12-01

    JAPANESE SOCIETY OF AGRICULTURAL, BIOLOGICAL AND ENVIRONMENTAL ENGINEERS AND SCIENTISTS

References:  6

Codes

  • NII Article ID (NAID)
    10012980048
  • NII NACSIS-CAT ID (NCID)
    AN10451761
  • Text Lang
    JPN
  • Article Type
    ART
  • ISSN
    09186638
  • NDL Article ID
    5585695
  • NDL Source Classification
    ZR3(科学技術--生物学--植物)
  • NDL Call No.
    Z18-3397
  • Data Source
    CJP  NDL  J-STAGE 
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