The pectic substances of zosteraceae

Ovodov, Yu. S.; Оводова, Р. Г.; Bondarenko, O. D.; Красикова, И. Н.

doi:10.1016/s0008-6215(00)80355-9

Cited by 43 publications

(13 citation statements)

References 12 publications

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“…The colorimetric methods also leave it uncertain how the galacturonic acid residues themselves are linked together. These problems were particularly troublesome in the present study since pectins of unusual composition, not conforming to the usual galacturonan/RGI/RGII pattern (21), had already been isolated from monocots (10,24), and few assumptions could safely be made about the nature of the neutral portions, and also because some ofthe graminaceous cell walls could be expected to contain galacturonic and glucuronic acid in small and perhaps comparable quantities. To (Table I).…”

mentioning

confidence: 83%

Section: Introductionmentioning

confidence: 99%

“…There is now a growing realization that some species in the Liliflorae and certain other monocot groups contain pectic polysaccharides in the quantities expected of dicots (10,13,18,24,26). Their hemicelluloses have been less investigated, but onion (Allium cepa) cell walls contain much xyloglucan (18,26).…”

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confidence: 99%

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A Survey of the Pectic Content of Nonlignified Monocot Cell Walls

Jarvis¹,

Forsyth²,

Duncan³

1988

Plant Physiol.

131

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The primary cell walls of graminaceous monocots were known to have a low content of pectin compared to those of dicots, but it was uncertain how widespread this feature was within the monocots as a whole. Nonlignified cell walls were therefore prepared from 33 monocot species for determination of their pectin content. It was not possible to solubilize intact pectins quantitatively from the cell walls, and the pectin content was assessed from three criteria: the total uronic acid content; the content of a-(1,4')-D-galacturonan isolated by partial hydrolysis and characterized by electrophoresis and degradation by purified polygalacturonase; and the proportion of neutral residues in a representative pectic fraction solubilized by sequential fl-elimination and N,N,N'N'-cyclohexanediaminetetraacetic acid extraction. Low galacturonan contents were restricted to species from the Gramineae, Cyperaceae, Juncaceae, and Restionaceae. Other species related to these had intermediate galacturonan contents, and the remainder of the monocots examined had high galacturonan contents comparable with those of dicots. The other criteria of pectin content showed the same pattern.The primary cell walls of the Gramineae (Poaceae) are quite different from those of dicots and gymnosperms. They contain little pectic material, and their main hemicelluloses are arabinoxylans (21). In fact, their composition is more like that of the secondary cell walls of woody dicots, although with little or no lignin and with differences in the detailed structure and chain packing of the polysaccharides.Formerly, all monocots were presumed to have primary cell walls like those of the Gramineae, few other species having been examined. There is now a growing realization that some species in the Liliflorae and certain other monocot groups contain pectic polysaccharides in the quantities expected of dicots (10,13,18,24,26

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confidence: 83%

Section: Introductionmentioning

confidence: 99%

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A Survey of the Pectic Content of Nonlignified Monocot Cell Walls

Jarvis¹,

Forsyth²,

Duncan³

1988

Plant Physiol.

131

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“…25 Apiose residues are beta-2-linked, 3-linked, as well as 2-and 3-linked to single GalA residues of HG (Fig. 4A).…”

Section: Substituted Galacturonans: Apiogalacturonan and Xylogalacturmentioning

confidence: 99%

The structure, function, and biosynthesis of plant cell wall pectic polysaccharides

Caffall

Mohnen

2009

Carbohydrate Research

1,349

892

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“…The pectin was isolated using techniques that included acid hydrolysis of raw material, extraction with ammonium oxalate, and sedimentation of pectin with ethanol [18]. The content of galacturonic acid in the pectin was determined applying the colorimetric hydroxydiphenyl method [7].…”

Section: Methodsmentioning

confidence: 99%

Comparative in vitro Assessment of Antioxidant Activities of Low-Etherified Pectin from the Eelgrass Zostera marina and Antioxidative Medicines

Коленченко

Sonina

2005

Russ J Mar Biol

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The problems of chemical regulation of oxidizing stress and the search for biologically active substances with antioxidant activity are the focus of attention of researchers in different fields of experimental biology and biomedicine [11,15,16]. In physiological conditions, the oxidation-reduction processes, which cover the energy need of cells and support oxygen utilization in tissues, are controlled by regulatory systems maintaining balanced interactions between the reactions that generate the products of oxidation and antioxidizing factors. Disturbances in this interaction, accompanied with activation of free radical processes and accumulation of products of lipid peroxidation, are considered as a universal mechanism of biological membrane damage [10,20] that is the basis of some pathological processes [9,12].Investigations of the relations between oxidizing stress and the development of many diseases revealed that the endogenous antioxidative system does not provide sufficient protection for cells and tissues against the damaging effects of free radicals. Therefore, the search for new agents of inhibition of prooxidative processes and the activation of antioxidation reactions is rather warranted [8,21].Among numerous natural compounds of high biological activity, zosterin polysaccharide, which was named after the source if its isolation, the eelgrass Zostera marina , a member of the family Zosteracea, has attracted particular attention. Zosterin is a pectin with an extremely low degree of etherification [17]. Experimental studies on zosterin pectin have revealed its pharmacological effects, such as the hypocholesteremic, entherosorption, antibacterial, antiviral, antitumoral, antiulcer, and immunomodulating effects [4]. Some of these effects are accompanied by a decrease in the concentration of the products of lipid peroxidation and normalization of the parameters of the endogenous antioxidative system in the blood and liver of experimental animals [3, 5]. These data presume the available antioxidative effects of the studied polysaccharide.The objective of this study was to reveal the antioxidative activities of low-etherified pectin from the eelgrass Z. marina and compare its activities with those of drugs used in medicine as antioxidants. MATERIAL AND METHODSThe eelgrass Zostera marina was sampled from clean water areas of Peter the Great Bay, Sea of Japan. The pectin was isolated using techniques that included acid hydrolysis of raw material, extraction with ammonium oxalate, and sedimentation of pectin with ethanol [18]. The content of galacturonic acid in the pectin was determined applying the colorimetric hydroxydiphenyl method [7]. The etherification was determined by the titrimetric technique [1]. The characteristic viscosity was determined in a mixed solution of 0.05 M sodium chloride and 0.005 M sodium oxalate at a temperature of 25.0 ° C and pH of 6.0 with an Ubbelohde viscosimeter [14]. The physical and chemical parameters of the isolated polysaccharide assay were as follows: galacturonic acid con...

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The pectic substances of zosteraceae

Cited by 43 publications

References 12 publications

A Survey of the Pectic Content of Nonlignified Monocot Cell Walls

A Survey of the Pectic Content of Nonlignified Monocot Cell Walls

The structure, function, and biosynthesis of plant cell wall pectic polysaccharides

Comparative in vitro Assessment of Antioxidant Activities of Low-Etherified Pectin from the Eelgrass Zostera marina and Antioxidative Medicines

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