クワイ(Sagittaria trifolia var. edulis (SIEB.) OHWI)の開花と種子発芽の促進 Promotion of Flowering and Seed Germination in Chinese Arrowhead (Sagittaria trifolia var. edulis (SIEB.) OHWI)

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Abstract

`青くわい'および`白くわい'の2品種のクワイの開花を促進するために,球茎を30および300ppmのジベレリン水溶液に3時間浸漬した.その後,すぐに水田土壌を入れた20l入りのバケツに植え付けて湛水状態で栽培した.`白くわい'の対、照区では21週目から開花が始まり,その開花株率は60%であった.処理区では,`青くわい'が植え付け後6週目から,`白くわい'が7週目からそれぞれ開花し始めた.`青くわい'の開花株率は30ppm区では60%,300ppm区では89%であり,`白くわい'のそれは両濃度区とも100%であった.したがって,`青くわい'では処理濃度が高い区の方が開花株率は高く,同濃度区では`白くわい'のほうが開花が容易と考えられる.1株当たりの発生花序数は1〜4本で,処理濃度の高い区の方に多くの花序が発生し,同濃度区では`白くわい'のほうが`青くわい'よつも多かった.ジベレリン処理区の花序の中に奇形と思われる葉を付けた花序が,また短いランナーの先端に形成された小さい花序がそれぞれ観察された. 処理区で形成された花序と花茎の長さ,雌花と雄花の数および全花数に対する雌花数の割合については,同一区内および区間で大きな変異が認められた.2品種とも処理区で形成された花の形態は正常であり,放任受粉によって多数の種子が得られた.

Two cultivars, 'Aokuwai' and 'Shirokuwai', of Chinese arrowhead, Sagittaria tnfolia var. edulis (SIEB.) OHWI, were treated with solutions of 30 and 300ppm of gibberellic acid (GA_3) to promote the production of inflorescences. Inflorescences were induced in both cultivars by the GA_3 treatments as well as in the control in the case of 'Shirokuwai'. The inflorescence consisted of a raceme or compound raceme. Flowering in the GA_3-treated 'Aokuwai' began six weeks after planting while seven weeks in 'Shirokuwai'. However, in the control plants flowering started 21 weeks after planting. The percentage of plants with racemes and the number of racemes per plant were higher for the 300ppm treatment than for the 30ppm one. The length of the flower stalks and racemes, and number of male and female flowers per raceme varied among the treatments. The flowers were complete and the pollen stainability rate with an I_2-KI solution exceeded 90% in the 300ppm treatment in the two cultivars. Many fertile seeds were produced by open pollination. Based on the results obtained, it was concluded that the GA_3 treatment at 300ppm was more effective in promoting the production of inflorescences as well as the production of fertlle pollen and seeds in Chinese arrowhead than that at 30ppm GA_3. The seeds displayed dormancy, which was broken by field storage for two months. Seed germination was promoted in the light compared with darkness. These findings may contribute to the development of methods for cross-breeding of Chinese arrowhead.

Journal

  • Japanese journal of breeding

    Japanese journal of breeding 39(3), 345-352, 1989-09-01

    Japanese Society of Breeding

Cited by:  2

Codes

  • NII Article ID (NAID)
    110001826078
  • NII NACSIS-CAT ID (NCID)
    AA11414601
  • Text Lang
    ENG
  • Article Type
    Journal Article
  • ISSN
    05363683
  • NDL Article ID
    3249111
  • NDL Source Classification
    RB48(農産--園芸作物および栽培--蔬菜)
  • NDL Source Classification
    ZR6(科学技術--農林水産)
  • NDL Call No.
    Z18-238
  • Data Source
    CJPref  NDL  NII-ELS 
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