Development of the Embryo Sac in Some Japanese Members of Cephalanthera (Orchidaceae)  [in Japanese] Development of the Embryo Sac in Some Japanese Members of Cephalanthera(Orchidaceae)  [in Japanese]

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Abstract

The development of embryo sacs in Cephalanthera erecta var. erecta, C. erecta var. subaphylla and C. falcata was investigated. In these three orchids the ovules are anatropous, tenuinucellate and bitegmic. In some ovules of C. falcata and C. longibracteata, it was observed that the anatropous and bitegmic condition was brought much delayed. The largest megaspore of a tetrad, which is farthest from the micropyle, becomes functional and its nucleus divides three times in succession, so that a mature embryo sac is always composed of eight nuclei. The developmental mode of embryo sacs in these three orchids is usually of the monosporic eight nucleate type. The embryological features of Cephalanthera investigated were compared with those of Epipactis, which is closely related genus of Cephalanthera.

Journal

  • Science reports of the Yokohama National University. Section (0xF9C2), Biology and geology

    Science reports of the Yokohama National University. Section (0xF9C2), Biology and geology (26), p1-9, 1979-11

    Yokohama National University

Codes

  • NII Article ID (NAID)
    110006151344
  • NII NACSIS-CAT ID (NCID)
    AN00246584
  • Text Lang
    JPN
  • Article Type
    departmental bulletin paper
  • Journal Type
    大学紀要
  • ISSN
    05135613
  • NDL Article ID
    2161457
  • NDL Source Classification
    RA27(発生・細胞・遺伝--植物)
  • NDL Source Classification
    ZR1(科学技術--生物学) // ZM41(科学技術--地球科学)
  • NDL Call No.
    Z18-80
  • Data Source
    NDL  NII-ELS  IR 
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