花粉の形成・成熟過程と花粉管の伸長過程におけるオルガネラの分化-液胞系を中心として-

DOI

書誌事項

タイトル別名
  • Differentiation of cell organelles during pollen formation?maturation and pollen tube elongation-focusing on the vacuolar system-

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Summary: The ultra-structural changes and behavior of vacuoles and related organelles(rER and Golgi bodies)during pollen development and maturation of Arabidopsis thaliana, and pollen tube elongation of Tradescantia reflexa will be described. In microspores just before generative cell formation, a large vacuole appeared which was made by fusion of pre-existing vacuoles and probably absorption of solutions. In the young pollen grain after the first mitosis, a large vacuole was divided into small vacuoles. The manner of division was not by binary fission and centripetally, but by the invagination of tonoplasts from one side to the opposite side of a vacuole. After the second mitosis, somatic typed vacuoles disappeared. In mature pollen grains just before germination, membrane-bound structures containing fine fibrillar substances(MBFs)appeared.Because of the expression of the pB vacuolar processing enzyme gene in these mature pollen grains, the MBFs were considered as storage vacuoles. In pollen grains from flowers in bloom, MBFschanged to lysosomal structures with acid phosphatases(lytic vacuole). They gradually increased in number andvolume, and decomposed the cytoplasm. A large vacuole at the base of elongating pollen tube may develope by membrane supply controlled with the ER and lipid granules, in addition to the absorption of water.

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詳細情報 詳細情報について

  • CRID
    1390282680335987584
  • NII論文ID
    130004303803
  • DOI
    10.5685/plmorphol.18.19
  • ISSN
    18844154
    09189726
  • データソース種別
    • JaLC
    • Crossref
    • CiNii Articles
  • 抄録ライセンスフラグ
    使用不可

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