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oosphere
oosphere Bot. (ˈəʊəsfɪə(r)) [mod. f. Gr. {wlenisisub}ό-ν egg + σϕαῖρα sphere.] The female reproductive cell, esp. in the Thallophytes or lower Cryptogams, which when fertilized becomes an oospore.1875 Bennett & Dyer tr. Sachs' Bot. 212 Oogonia are cells in which the female reproductive bodies or Oos...
Oxford English Dictionary
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Oospore
An oospore is a thick-walled sexual spore that develops from a fertilized oosphere in some algae, fungi, and oomycetes.
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oospore
oospore Bot. (ˈəʊəspɔə(r)) [f. Gr. {wlenisisub}ό-ν egg + σπόρος seed, spore.] The fertilized female cell or oosphere, esp. in the lower Cryptogams, which forms the germ of a future plant.1865 Cooke Rust, Smut, etc. 131 After this contact of the two bodies, the gonosphere acquires a new name, and is ...
Oxford English Dictionary
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Ovum (disambiguation)
Ovum most commonly refers to:
Ovum, oosphere or egg cell, the female gamete involved in oogamous sexual reproduction
Ovum may also refer to:
In music
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Oogonium
The antheridia will then form fertilization tubes connecting the antheridial cytoplasm with each oosphere within the oogonia. A haploid nucleus (gamete) from the antheridium will then be transferred through the fertilization tube into the oosphere, and fuse with the oosphere's
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oosperm
oosperm (ˈəʊəspɜːm) [mod. f. Gr. {wlenisisub}ό-ν egg + σπέρµα seed, sperm.] a. Zool. A fertilized ovum. b. Bot. = oospore.1888 Rolleston & Jackson Anim. Life Introd. 25 The ovum has now [after impregnation] become an oosperm, and it speedily undergoes fission or segmentation and gastrulation. 1892 S...
Oxford English Dictionary
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pronucleus
‖ pronucleus Biol. (prəʊˈnjuːklɪəs) [mod.L. (E. van Beneden), f. Gr. πρό, pro-2 + nucleus.] A primitive or prior nucleus; in Zool. the nucleus of a spermatozoön or of an ovule, before these unite to form the definitive nucleus of the fertilized ovum; in Bot. the nucleus of a gamete, which, by coales...
Oxford English Dictionary
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Egg cell
When fertilized the oosphere becomes the oospore. Other organisms
In algae, the egg cell is often called oosphere.
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synergida
‖ synergida Bot. (sɪˈnɜːdʒɪdə) Pl. -idæ (-ɪdiː). Also anglicized synergid. [mod.L., f. Gr. συνεργεῖν to co-operate.] Either of two naked nucleated cells at the apex of the embryo-sac, regarded as co-operating with the oosphere in the production of the embryo.1882 Vines tr. Sachs' Bot. 580 Two of the...
Oxford English Dictionary
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Achlya bisexualis
Antheridia will give one male nucleus to each eggs in oosphere then become diploid oospore.
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periplasm
periplasm (ˈpɛrɪplæz(ə)m) [mod. (De Bary 1881) f. Gr. περί around + πλάσµα anything formed: see plasm.] 1. Bot. The portion of the protoplasm in the sexual organs of the Peronosporeæ, left over after the differentiation of the sexual cells.1887 tr. De Bary's Morphol. Fungi v. 134 The space between t...
Oxford English Dictionary
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Double fertilization
See also
Fertilisation
Gamete
Megaspore
Oosphere
Ovule
Pollen
References
Plant sexuality
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بويضة
الكائنات الحية الأخرى
في الطحالب، تسمى خلية البويضة غالبًا بـ oosphere.
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Floral morphology
The seminal rudiment, also called the ovule, is the plant organ that forms in the ovary and contains the embryo sac within which are the oosphere or female The oosphere fuses with one of the generative nuclei of the pollen grain during double fertilization to give rise to the embryo.
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zygo-
zygo- (zaɪgəʊ, zɪgəʊ) before a vowel properly zyg-, repr. Gr. ζυγο-, combining form of ζυγόν yoke; occurring in various scientific terms, of which the more important will be found in their alphabetical places. (In terms of Biology the prefix often refers to conjugation or zygosis as a method of repr...
Oxford English Dictionary
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