Structural characteristics of oxalate-soluble polysaccharides from Norway spruce (Picea abies) foliage.

Autor: Makarova EN; Institute of Chemistry, Federal Research Center 'Komi Science Centre of the Ural Branch of the Russian Academy of Sciences', Pervomaiskaya St. 48, Syktyvkar, 167982, Russia. Electronic address: makarowa.elena-ma@yandex.ru., Shakhmatov EG; Institute of Chemistry, Federal Research Center 'Komi Science Centre of the Ural Branch of the Russian Academy of Sciences', Pervomaiskaya St. 48, Syktyvkar, 167982, Russia.
Jazyk: angličtina
Zdroj: Carbohydrate polymers [Carbohydr Polym] 2020 Oct 15; Vol. 246, pp. 116544. Date of Electronic Publication: 2020 Jun 05.
DOI: 10.1016/j.carbpol.2020.116544
Abstrakt: Structurally different polymers were derived from Picea abies foliage by successive extraction with water (PA W ), HCl solution (PA A ) and (NH 4 ) 2 C 2 O 4 solution (PA O ). The P. abies foliage was found to contain basically low-methoxyl pectin extractable with an (NH 4 ) 2 C 2 O 4 solution. PA W was shown to comprise primarily arabinogalactan-proteins (AGPs); PA A was composed of mixed AGPs and pectic polysaccharides, with the latter prevailing; and polysaccharide PA O isolated in the highest yield included chiefly pectic polysaccharides. The major constituents of PA O were low-methoxyl and low-acetylated 1,4-α-d-galacturonan and partially acetylated RG-I. The sugar side chains of RG-I contained chiefly highly branched 1,5-α-l-arabinan and arabinogalactan type I as a minor constituent. RG-I whose side chains had 1,5-α-l-arabinan represented short regions alternating with non-acetylated and unmethylesterified galacturonan regions. In addition to pectins, polysaccharide PA O contained AGPs, xylanes and glucomannans, indicating that these polysaccharides are in an intimate interaction.
(Copyright © 2020 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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