Female gametophyte development inAristolochia labiataWilld. (Aristolochiaceae)
نویسندگان
چکیده
منابع مشابه
Female gametophyte development.
Early in their evolution, plants acquired a life cycle that alternates between a multicellular haploid organism, the gametophyte, and a multicellular diploid organism, the sporophyte. Angiosperms have both female and male gametophytes. The female gametophyte is critical to many steps of the angiosperm reproductive process, including pollen tube guidance, fertilization, the induction of seed dev...
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The anther, pollen and ovule development in Achillea tenuifolia were studied with a bright field microscopy. Results showed that the anther is of tetrasporangiate type and the anther wall is composed by four layers: an epidermis, an endothecium, one middle layer and a tapetum layer. Tapetum is of secretory type and its cells showed polyploidy. Pollen tetrads were tetrahedral, microspores were v...
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In Nicotiana tabacum, female gametophytes are not fully developed at anthesis, but flower buds pollinated 12 h before anthesis produce mature embryo sacs. We investigated several pollination-associated parameters in N. tabacum flower buds to determine the developmental timing of important events in preparation for successful fertilization. First, we performed hand pollinations in flowers from s...
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1 Department of Botany, Graduate School of Science, Kyoto University, Kitashirakawa-oiwake, Sakyo, Kyoto, 606-8502 Japan 2 Institute of Plant Biology, University of Zurich, Zollikerstrasse 107, Zurich, CH-8008, Switzerland 3 Temasek Life Sciences Laboratory, 1 Research Link, National University of Singapore, Singapore 117604 4 Department of Biological Mechanisms and Functions, Graduate School o...
متن کاملFemale gametophyte development in Adesmia latifolia ( Spreng . ) Vog . ( Leguminosae – Papilionoideae )
(Female gametophyte development in Adesmia latifolia (Spreng.) Vog. (Leguminosae – Papilionoideae)). The female gametophyte has a monosporic origin and a Polygonum type development. The female gametophyte growth consumes a large part of the neighboring nucellar cells and, in the micropylar region, part of the nucellar epidermis and internal integument. The mature gametophyte is composed of only...
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ژورنال
عنوان ژورنال: Botanical Journal of the Linnean Society
سال: 2008
ISSN: 0024-4074,1095-8339
DOI: 10.1111/j.1095-8339.2008.00820.x