Callose is a plant polysaccharide. It is composed of glucose residues linked together through β-1,3-linkages, and is termed a β-glucan. It is thought to be manufactured at the cell wall by callose synthases and is degraded by β-1,3-glucanases. It is laid down at plasmodesmata, at the cell plate during cytokinesis and during pollen development. ...
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http://en.wikipedia.org/wiki/Callose
bearing callosities or having a hard thickened surface
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http://orchidfetish.com/glossary.html
• (a.) Furnished with protuberant or hardened spots.
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http://thinkexist.com/dictionary/meaning/callose/
<plant biology> A plant cell wall polysaccharide (a _ (1-3) glucan) found in phloem sieve plates, wounded tissue, pollen tubes, cotton fibres and certain other specialised cells. ... (18 Nov 1997) ...
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An amphorous, hardened, mucilaginous constituent of plant cells to block pores in cell walls, e.g. sieve plates and to inhibit invasion by some pathogens.
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Cal'lose adjective [ See
Callous .]
(Botany) Furnished with protuberant or hardened spots.
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http://www.encyclo.co.uk/webster/C/10
Type: Term Pronunciation: kal′ōs Definitions: 1. A linear 1,3-β-d-glucan formed by certain enzymes from UDP-glucose, differing from cellulose (a β-1,4-glucan formed from GDP-glucose) and starch amylose (an α-1,4-glucan formed from ADP-glucose). Found in certain plant cell walls.
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http://www.medilexicon.com/medicaldictionary.php?t=13451
bearing callosities or having a hard thickened surface
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http://www.orchidspecies.com/glossary.htm
No exact match found.
