callose


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cal·lose

(kal'ōs),
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.

callose

a thick CARBOHYDRATE plant material deposited in the pores of sieve plates in response to damage, disease or simply over a period of time, resulting in a blockage of the SIEVE TUBE. Callose is also present in the walls of fungal hyphae.
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References in periodicals archive ?
Exposure to heavy metal stress regulates intercellular signaling via callose deposition and breakdown.
The presence of galactooligosaccharides, cellulose, lignin, and callose in the cambium is very favorable for growth of bacterial phylum Firmicutes that predominates in summer time.
Previous study was applied on Tetraploid Red Clover (Trifolium pratense L.) pollen which showed present abnormalities pollen tube as bifurcated monosphonic pollen tube, pollen tube with a wavy structure, pollen tube due to cytoplasm deposition and wall swelling, pollen tube with thickened walls, pollen tube with callose formation at its tips and Callose plugs formed in pollen tube cytoplasm, but this research did not mention percentage of each type.
Peterson, "A berberine-aniline blue fluorescent staining procedure for suberin, lignin, and callose in plant tissue," Protoplasma, vol.
Multi-membrane spanning Gts (cellulose and callose synthases) are typically associated with the plasma membrane, while both Gts classes type II and multimembrane spanning have been found in Golgi stacks where they are likely involved in the biosynthesis of complex [beta]-glycan polymers [7-9].
2B), male also with a pair of yellow callose spots close to posterior margin of sternite VIII.