Detail Scientific Correspondence: Molecular Genetics of Reproductive Biology in Orchids (in Plant Physiology, December 2001, Vol. 127) Bibliografi Author: Hao, Yu ; Chong Jin Goh Topik: Orchids; Orchidaceae; reproductive biology; microgametogenesis; megagametogenesis; fertilization Bahasa: (EN )     Tahun Terbit: 2001     Jenis: Article - diterbitkan di jurnal ilmiah internasional Fulltext: 1390.pdf (48.2KB; 0 download) Abstract Orchids are members of the family Orchidaceae, one of the largest families of flowering plants. There are an estimated 20,000 to 25,000 orchid species, which occupy wide ranges of ecological habitats and exhibit highly specialized morphological, structural, and physiological characteristics (Dressler, 1990). In particular, the most spectacular evolution is shown in reproductive biology. The production of column (a fused structure of stamens and styles) to facilitate pollination is well documented and the co-evolution of orchid flowers and pollinators is well known (van der Pijl and Dodson, 1969). Even more significant but less well-known aspects are the early development and maturation of the pollen grains (packaged as pollinia—pollen grains bound together by viscin threads in masses for effective pollination), the postpollination development and maturation of ovules, the synchronized timing of micro- and megagametogenesis for effective fertilization along the whole length of placenta, and the release of tens of thousands or millions of immature embryos (globular stage) in mature capsules (Raghavan and Goh, 1994). Without doubt, these various strategies, unique to orchids, contribute to the success of orchid family. Opini Anda Klik untuk menuliskan opini Anda tentang koleksi ini! Lihat Sejarah Pengadaan  Konversi Metadata   Kembali

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