megagametophyte


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megagametophyte

[¦meg·ə·gə′mēd·ə‚fīt]
(botany)
The female gametophyte in plants having two types of spores.
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References in periodicals archive ?
In vitro morphogenesis of Ceratozamia hildae and C mexicana from megagametophytes and zygotic embryos.
In an effort to identify possible causes for low rates of seed initiation in greenhouse-grown buckwheat, megagametophyte structure was surveyed across the time course of maximum reproductive activity (Weeks 5 through 9).
Fine structural development of the megagametophyte of Zea mays following fertilization.
Absence of the micropyle might have contributed to sterility since it is through the micropyle that the microgametophyte enters the megagametophyte.
We used electrophoresis of megagametophyte and embryo pairs to analyze the mating system in two populations, Cerro de la Cruz and Arroyo del Infierno.
The pollination, by a donor raised in one environment, of homozygous, identical maternal plants raised in an array of environments will allow the detection of environmentally induced maternal effects (cases 3 and 4, above) ruling out the possibility of environment-specific meiotic drive among megagametophytes.
Each megagametophyte was crushed over ice in one drop of extraction buffer (10 ml 0.
Coordinated timetables for megagametophyte development and pollen tube growth in Rhododendron nuttallii from anthesis to early postfertilization.
Studies of floral morphology in the Ericales, II: Megagametophyte development in the Andromedeae.
Higher rates of paternity exclusion can generally be achieved in outcrossing gymnosperms, in part because of their high levels of genetic polymorphism, but particularly because the female contribution to the seed can be unambiguously determined through the megagametophyte.
5(-5) cm long, purple or tinged green, resinous, ripening the second season; seeds hard, woody, nearly as large as the aril, megagametophyte smooth to slightly or deeply ruminated.