ダイコンにおける自家不和合性の生理機構について (第2報)

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書誌事項

タイトル別名
  • Studies on the physiological mechanism of self-incompatibility in Japanese radish. II
  • ダイコンにおける自家不和合性の生理機構について-2-2,3薬品処理による自家不和合性の消去
  • ダイコン ニ オケル ジカ フワ アイショウ ノ セイリ キコウ ニ ツイテ 2 2 , 3 ヤクヒン ショリ ニ ヨル ジカ フワ アイショウ ノ ショウキョ
  • Breakdown of self-incompatibility by chemical treatments

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抄録

It has already been known that the barrier of self-incompatibility in the Curuciferae is stigmatic cuticle. LINSKENS (1961) reported that the breakdown of self-incompatibility in a species of this family was observed by treating stigmatic cuticle with cutinase. The purpose of this investigation was to attempt the breakdown of self-incompatibility in Japanese radish by using cirtain chemicals, instead of cutinase.<br>Of several chemicals tested ether and 10 percent solution of potassium hydroxide (KOH) were effective and they were employed chiefly. The stigmas were treated with an extremely small amount of ether or the 10 percent solution of KOH, using a fine straw of wheat. At the operation special attention should be given to avoid treating with the excess of chemicals. Because it causes the stigmas to be changed from green to black in color and further them to be destroyed. Some time after treatments the stigmas were smeared with pollen from other flowers of the same plant. The behavior of pollen on stigmas was examined by the following procedure: The pistils were collected at 24 hours after pollination, fixed and stained with 0.5 percent lactic-blue for 2 hours, differentiated with lactic acid for about 24 hours, and at last mounted with glycerine. On the other hand, field pollination experiments were carried out to determine the effect of ether treatments on self-fertility. The results obtained were presented in Table 1 and 2.<br>The treated plants were much superior in the percentages of pollen germination and those of compatible pollen grains to the controls (Table 1). The percentages of pod-setting of the treated plants were higher than those of the controls, except in one case (a self-compatible plant, No. 7) (Table 2). From these results it may be concluded that the self-incompatibility of Japanese radish is to some degree broken down by treating the stigmas with ether or 10 percent solution of KOH. For this purpose ether is more effective than 10 percent solution of KOH. It seems likely that ether treatments cannot dissolve the stigmatic cuticle, but make it permeable to water.

収録刊行物

  • 園芸学会雑誌

    園芸学会雑誌 37 (3), 227-230, 1968

    一般社団法人　園芸学会

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