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Dictionary » A » Aster

Aster

Definition

noun, plural: asters

(cell biology) A star-shaped cluster of microtubules radiating from the pericentriolar region, and seen immediately before and during mitosis of an animal cell.

(botany) A plant genus of the family Asteraceae; the flower of this group.


Supplement

In cells, the role of astral microtubules in mitosis is to ensure correct positioning and orientation of the mitotic spindle apparatus based on cell polarity. Although this function is essential in mitosis, the process does not strictly require astral microtubules to progress.


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Name game

Aster novae-angliae - New England Aster

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by Cat
Sat Jun 28, 2008 8:45 pm
 
Forum: General Discussion
Topic: Name game
Replies: 176
Views: 152616

The Fiber Disease

... various diseases. In Hawaii, these include: Fusarium oxysporum f.sp.asparagi (fusarium yellows on asparagus); f.sp.callistephi (wilt on China aster); f.sp.cubense (Panama disease/wilt on banana); f.sp.dianthi (wilt on carnation); f.sp.koae (on koa); f.sp.lycopersici (wilt on tomato); f.sp.melonis ...

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by Skytroll
Wed Jul 12, 2006 6:12 pm
 
Forum: Human Biology
Topic: The Fiber Disease
Replies: 7403
Views: 4468132

about human fertilization

i think that, in this topic, not only centrioles can do the job as the aster in the cell when the cell is in the mitosis or meiosis... i will said that some thing that have a great "attraction" on spindel occurs. this matterial replace the centrioles ...

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by baikuza
Mon Jun 12, 2006 5:14 am
 
Forum: Physiology
Topic: about human fertilization
Replies: 2
Views: 3486

about human fertilization

... Metaphase...centrioles arive at the poles of the cell and the chromosomes (centromeres) line up on the equitorial plate with spindle fibers and aster rays visible in cytoplasm. Doc44 IPMAT

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by Doc44
Sun Jun 04, 2006 4:47 pm
 
Forum: Physiology
Topic: about human fertilization
Replies: 2
Views: 3486

The Fiber Disease

... various diseases. In Hawaii, these include: Fusarium oxysporum f.sp.asparagi (fusarium yellows on asparagus); f.sp.callistephi (wilt on China aster); f.sp.cubense (Panama disease/wilt on banana); f.sp.dianthi (wilt on carnation); f.sp.koae (on koa); f.sp.lycopersici (wilt on tomato); f.sp.melonis ...

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by Skytroll
Sun Apr 16, 2006 3:50 am
 
Forum: Human Biology
Topic: The Fiber Disease
Replies: 7403
Views: 4468132
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