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Callose

Definition

noun

(botany) A plant polysaccharide composed of glucose residues linked together through β-1, 3-linkages secreted by an enzyme complex (callose synthase), resulting in the hardening or thickening of plant cell walls.


Supplement

Callose separates developing pollen grains, preventing their underlying walls from fusing. It also functions in the formation of the cell plate, plasmodesmata, tracheids, and root hairs. It is also produced in plant cells in response to wounding, heavy metal treatment (e.g. aluminum) and pathogen infection.

Other plant parts where callose can be found are in phloem sieve plates, pollen tubes, cotton fibers, at the base of a lemma or palea in grasses, and other specialized cells.


Word origin: From Latin callōsus, callous.

Synonym:

  • beta-1,3-glucan

Compare: cellulose


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The Fiber Disease

... now, add to that Wolbachia in the insects, you have and OLD and a NEW disease. Oncho when it dies on our skin it creates what most likely is the Callose, made of calcium, it is the dying end of the worm coming out, the rest is inside and is still alive. Wolbachia keeps it alive. The worm itself ...

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by Skytroll
Sun Sep 10, 2006 5:34 pm
 
Forum: Human Biology
Topic: The Fiber Disease
Replies: 7403
Views: 5479194

Vacuole

... of the organic things are cellulose). The cellular walls of absorbant hairs of the root are made of a substance i think in English is called callose. It is more permeable than cellulose and it maximizez absorption Regards, Andrew Right Andrew, but I think I asked the question wrong. The part ...

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by Poison
Sat Mar 12, 2005 4:42 pm
 
Forum: Cell Biology
Topic: Vacuole
Replies: 23
Views: 31376

Vacuole

... of the organic things are cellulose). The cellular walls of absorbant hairs of the root are made of a substance i think in English is called callose. It is more permeable than cellulose and it maximizez absorption Regards, Andrew

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by MrMistery
Fri Mar 11, 2005 9:28 pm
 
Forum: Cell Biology
Topic: Vacuole
Replies: 23
Views: 31376

Role of EDTA in protoplast lysis?

EDTA solution was fed to the petioles, which is known to prevent callose sealing of sieve tubes. http://wwwuser.gwdg.de That is the only reference I have been able to find. What class and level work are you doing? Kyle

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by biostudent84
Sat Dec 04, 2004 7:04 am
 
Forum: Cell Biology
Topic: Role of EDTA in protoplast lysis?
Replies: 3
Views: 10328


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