Journal
CARBOHYDRATE POLYMERS
Volume 157, Issue -, Pages 484-492Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2016.10.011
Keywords
Tricholoma lobayense; Polysaccharides; Structural elucidation; Antioxidant activity
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Funding
- National Natural Science Foundation of China [31271817, 21301165]
- Key Project of Science and Technology of Anhui Province [1501031099]
- Doctoral Scientific Research Foundation of Anhui University
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Tricholoma lobayense is a nutritious mushroom with great health benefits. Three polysaccharides with purity higher than 99% were successfully extracted from Tricholoma lobayense. The molecular weights of TLH-1, TLH-2 and TLH-3 were determined to be 8.43 x 10(5), 5.36 x 10(5) and 4.53 x 10(3) Da, respectively. The backbones of TLH-1 and TLH-2 were mainly composed of 1,4-linked alpha-D-glucopyranosyl. However, polysaccharide TLH-3 was found to be a highly branched glucogalactan, which is made up of 1,3-linked alpha-D-glucopyranosyl branched at C-6 and 1,3-linked beta-D-galactopyranosyl. In vitro antioxidant activity assays revealed that TLH-3 exhibited highest antioxidant activities among the polysaccharides from Tricholoma lobayense, which were comparable to those of ascorbic acid. The results suggested that the outstanding antioxidant activities of TLH-3 might depend on its low molecular weight, high branch degree, versatile linkage types and complex conformation. These characteristics make TLH-3 an attractive natural antioxidant for food and pharmaceutical applications. (C) 2016 Elsevier Ltd. All rights reserved.
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