Navigation Links
Polar nuclei


polar nuclei
In angiosperms, the two nuclei of the central cell of the female gametophyte; they fuse with a sperm nucleus to form the triploid (3n) endosperm nucleus.
pollen ...
Full article >>>

polar nuclei Two of the eight haploid nuclei of a megagametophyte that migrate, one from each end, to the middle of the embryo sac. These two nuclei fuse with a sperm nucleus during double fertilization.
Full article >>>

polar nuclei
The two nuclei that are formed at each pole of the angiosperm embryo sac. They will fuse with a male nucleus to form a primary endosperm nucleus.
Covered in Lab 8 Seed Plant Reproduction ...
Full article >>>

One sperm nucleus fuses with the egg forming the diploid zygote.
The other sperm nucleus fuses with the polar nuclei forming the endosperm nucleus. Most angiosperms have two polar nuclei so the endosperm is triploid (3n).
Full article >>>

The events of "double fertilization" of the egg and polar nuclei by the two sperm cells. Image from Purves et al.
Full article >>>

: The union of one male gametophyte nucleus with the ovum nucleus and another male gametophyte nucleus with the polar nuclei to form the endosperm in seed plants. See also
pollen grain
.
Double heterozygote ...
Full article >>>

The other sperm cell fuses with two haploid polar nuclei in the center of the embryo sac. The resulting cell is triploid (3n). This triploid cell divides through mitosis and forms the endosperm, a nutrient-rich tissue inside the fruit.
Full article >>>


'"/>


See more about: Polar nuclei

TAG: Polar nuclei
Other biology dictionary
(Date:10/10/2008)... Gasterosteus aculeatus , is one of the most thoro...a particularly useful model for understanding vari...rphology caused by different ecological situations...lar and genetic to developmental and morphological... has proven far more complex than even imagined. ,...
(Date:10/10/2008)...tists have created nanowire sensors coupled with s...sitive and specific enough to be used for point-of...rt in Nano Letters . , The sensors use activati...gnatures of bacteria, viruses or cancer cells as ...duce acid, and generate a tiny current in the nano...
(Date:10/10/2008)...n German . , DNA, the molecule that acts as t...life, is highly resistant against alteration by ul...or its photostability presents some puzzling probl...our chemical bases that make up the DNA molecule. ...howing that DNA strands differ in their light sens...
(Date:10/9/2008)...on to the IOF World Congress on Osteoporosis 2008,...til October 31, 2008. , To benefit from lower r...ww.iofbonehealth.org/wco/2008/homepage.html . Spe...nts from non-OECD countries and for IOF members. A...t higher rates, will be possible. , Your chance...
Breaking Biology News(10 mins):Fitness in a changing world 2Fitness in a changing world 3Sensitive nanowire disease detectors made by Yale scientists 2Can genetic information be controlled by light? 2Elizabeth Edwards to Join SEIU Activists at Conference 2270 1Elizabeth Edwards to Join SEIU Activists at Conference 2270 2Siemens Building Technologies Pioneers Wireless Solution for St Anthonys Sensitive Environment 2268 1Siemens Building Technologies Pioneers Wireless Solution for St Anthonys Sensitive Environment 2268 2Hypertension Diagnostics Announces Fiscal Year 2007 Results 2266 1Hypertension Diagnostics Announces Fiscal Year 2007 Results 2266 2Hypertension Diagnostics Announces Fiscal Year 2007 Results 2266 3Poniard Pharmaceuticals Announces Upgrade of Stock Listing to NASDAQ Global Market 911 1Poniard Pharmaceuticals Announces Upgrade of Stock Listing to NASDAQ Global Market 911 2
...ity scale in a new international study of adolesce...sen, a professor in Queen,s University,s School of... Community Health & Epidemiology. , And sedent...gly correlated with being overweight, he adds. , ...contrary to what the research team expected. Surpr...
...y every 26 million years, leading some scientists ...ons with comets or asteroids. A researcher in Pola...edators are at fault instead. , Adam Lipowski (Ada...odel of many species competing for both food and l...ontrols mutation rates, allowing new species to de...
...s among nerve cells in the brain has a UT Southwes...the mysteries of sleep. , By tracking which nerve...chers in Japan and at UT Southwestern found that a...ake receives inhibitory signals from neurons activ...ive signals from nerve cells that are very active ...
...Montreal is pleased to announce the first successf...eam led by Professor Seang Lin Tan, Chair of the D...niversity and Director of the McGill Reproductive ... of a healthy baby boy, weighing 3740grams on Apri...F) Centre in Canada to achieve this success," says...
Other Biology News:Canadian youth 4th highest in international obesity study 2Brain-mapping technique aids understanding of sleep, wakefulness 2Brain-mapping technique aids understanding of sleep, wakefulness 3First frozen egg baby born in Canada 2First frozen egg baby born in Canada 3