カキの発芽期以降における花器の発育について

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  • カキの発芽期以降における花器の発育について(農学部門)
  • カキ ノ ハツガキ イコウ ニ オケル カキ ノ ハツイク ニ ツイテ
  • Studies on the development of floral organ in Japanese persimmon (cv. Hiratanenashi) after sprouring (Agriculture)

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Abstract

The development of female floral organ in Japanese persimmon (cv. Hiratanenashi) has been followed from the time of sprouting until full bloom. The obtained results were as follows. The differentiation of each organ was initiated from the outer organs, namely in order of calyx, petal, staminodium, and carpel. Only calyx and petal primordia were observed at sprouting, but staminodium and carpel primordia differentiated about 5 to 7 days after sprouting. The ovule primordia were initiated on the infolded carpel edges near the base of the ovarian cavity in the middle of April, and the growth of them was more rapid. Integument, nucellus and embryo-sac mother cell were formed in the end of April. The formation of ovule was completed about 2 days before full bloom, but no differetiation of tapetum and pollen grains was observed in the staminodium. Thus, the formation floral organ in Japanese persimmon was completed about 6 weeks from the sprouting time.

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