Abstract:
:The structure of a glucuronoarabinoxylan in Zea mays L. (hybrid B73 x Mo17) shoot cell walls has been studied. The water-insoluble fraction of Zea shoot cell walls, pretreated with purified Bacillus subtilis (1 --> 3), (1 --> 4)-beta-d-glucan 4-glucanohydrolase, was treated with purified B. subtilis endo-(1 --> 4)-beta-xylanase. Carbohydrates (2.6% of the waterinsoluble fraction of Zea shoot cells walls) derived from the enzyme treatment consisted of glucuronoarabinoxylan fragments with molecular weights which varied from a few hundred to over 2.0 x 10(5) daltons. Structural analyses of the fragments suggested that the glucuronoarabinoxylan had a xylan backbone which contained (1 --> 4)-beta-d-xylopyranosyl residues, with about 60 to 70% substitution at the C-2 or C-3 position with arabinose, glucuronic acid, and other substituents. Furthermore, the glucuronoarabinoxylan contained a phenolic component which appeared to be primarily ferulic acid bonded to carbohydrate, probably by an ester linkage. The amount of ferulic acid was approximately 3 micrograms per 100 micrograms of carbohydrate.
journal_name
Plant Physioljournal_title
Plant physiologyauthors
Kato Y,Nevins DJdoi
10.1104/pp.75.3.759subject
Has Abstractpub_date
1984-07-01 00:00:00pages
759-65issue
3eissn
0032-0889issn
1532-2548journal_volume
75pub_type
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