Callose


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callose

[′ka‚lōs]
(biochemistry)
A carbohydrate component of plant cell walls; associated with sieve plates where calluses are formed.
(biology)
Having hardened protuberances, as on the skin or on leaves and stems.

Callose

 

a polysaccharide, insoluble in water, contained in plants and consisting of glucose-molecule residues joined in a spiral chain (as opposed to cellulose, in which the glucose molecules are joined in a straight chain).

Callose lines the tubules of the sievelike layers of phloem; asthese tubules age, the amount of callose increases and the tubulesbecome plugged and cease functioning. When a plant is injured, callose is deposited on the cell walls of the parenchyma, forminga callus. Callose is also found in the cell walls of some algae andfungi.

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Abnormal callose response phenotype and hyper-susceptibility to Peronospora parasitica in defense-compromised Arabidopsis nim 1-1 and salicylate hydroxylase-expressing plants.
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Aluminum tolerance of maize cultivars as assessed by callose production and root elongation.
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Callose content was determined by using a JASCO Spectrofluorometer FP-777 (Japan Spectroscopic Co, Ltd, Tokyo) with excitation at 350 nm and emission at 500 nm.
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Callose staining indicates numerous cytoplasmic connections between bundle sheath cell prolongations and neighboring non-vascular cells.
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Using immunofluorescence and immunogold electron microscopy techniques, we characterized the distribution of various cell wall polysaccharides namely, callose, cellulose, and pectins.
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The developmental events after callose dissolution.
Morfologia del androceo, tapete y ultraestructura del polen de Siparuna aspera (Ruiz & Pavon) A. DC. (Siparunaceae)
By October, Cummings Carson said, callose tissue should have formed around some canker margins if the introduced hypovirulent strain is reproducing.
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2A), and a thick callose wall surrounded the microspore tetrad (Fig.
Microsporogenesis, Megasporogensis and Male and Female Gametophyte Development in Feijoa sellowiana (Myrtaceae)
After the dissolution of the callose wall, the sporopollenin wall begins to form.
Pollen grain and microsporogenesis in Scrophularia sriata Boiss. (Scrophulariaceae)
The sporocyte wall, usually consisting of callose or mucopolysaccharides, isolates cells programmed to enter the meiotic pathway from the influence of surrounding vegetative cells.
Sporogenesis in bryophytes: patterns and diversity in meiosis
Sucrose utilization via invertase and sucrose synthase with respect to accumulation of cellulose and callose in wheat roots under oxygen deficiency.
NaCl and Phaeomoniella chlamydospora affect differently starch and sucrose metabolism in grapevines/NaCl e Phaeomoniella chlamydospora afetam de forma diferente o metabolismo do amido e da sacarose em videiras
Genotypic and Developmental Evidence for the Role of Plasmodesmatal Regulation in Cotton Fiber Elongation Mediated by Callose Turnover.
Carbon-13 turnover in 'roxo de valinhos' fig trees/Renovacao do carbono-13 em figueiras 'roxo de valinhos'

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