Dictionary > 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.
Synonym(s):

  • Lavdovsky’s nucleoid
  • paranuclear body

See also:

  • mitosis
  • centriole
  • microtubule
  • astrosphere
  • Related form(s):

    • Amphiaster


    You will also like...

    Circulation
    Circulation

    The circulatory system is key to the transport of vital biomolecules and nutrients throughout the body. Learn about the ..

    Independent Assortment and Crossing Over
    Independent Assortment and Crossing Over

    This tutorial describes the independent assortment of chromosomes and crossing over as important events in meiosis. Read..

    Chromosome Mutations
    Chromosome Mutations

    Mutations can also influence the phenotype of an organism. This tutorial looks at the effects of chromosomal mutations, ..

    Still Water Community Plants
    Still Water Community Plants

    This tutorial looks at the adaptations of freshwater plants for them to thrive in still water habitats. Familiarize your..

    green leaf - close up view
    Leaves

    Leaves are the major photosynthetic organ of a plant. Apart from that, they are also crucial to water movement. In this ..

    Lake Wakatipu, New Zealand
    New Zealand’s Unique Geographical History

    Explore why New Zealand has such unique flora and fauna, and learn why long periods of geographical isolation. This less..

    Related Articles...

    No related articles found

    See all Related Topics