Megasporogenesis, megagametogenesis and embryogenesis of Liparis elliptica (Orchidaceae), with special note to the development of unique unitegmal ovule.
Andrey S Ryabchenko, Galina L Kolomeitseva, Alexander V Babosha, Vladimir A Koval
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引用次数: 0
Abstract
Megasporogenesis, megagametogenesis and embryogenesis of Liparis elliptica (family Orchidaceae, tribe Malaxideae, subtribe Malaxidinae) have been studied. It was shown that the L. elliptica embryo sac is monosporic and develops from the chalazal cell of the megaspore triad according to the modified Polygonum type. The embryo sacs are reduced to four-six nuclei. The suspensor is unicellular, spherical in shape, originating from the basal cell (cb). A unique feature of L. elliptica is the unitegmal ovule, which distinguishes this species from other members of the tribe Malaxideae. The seed coat is formed by an outer layer of the single internal integument. Reduction of the outer integument is a rare feature for epiphytic orchid species with photosynthetic leaves.
期刊介绍：
Protoplasma publishes original papers, short communications and review articles which are of interest to cell biology in all its scientific and applied aspects. We seek contributions dealing with plants and animals but also prokaryotes, protists and fungi, from the following fields:
cell biology of both single and multicellular organisms
molecular cytology
the cell cycle
membrane biology including biogenesis, dynamics, energetics and electrophysiology
inter- and intracellular transport
the cytoskeleton
organelles
experimental and quantitative ultrastructure
cyto- and histochemistry
Further, conceptual contributions such as new models or discoveries at the cutting edge of cell biology research will be published under the headings "New Ideas in Cell Biology".
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