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Int. J. Mol. Sci. 2017, 18(7), 1564; doi:10.3390/ijms18071564

Olive Mill Waste Enhances α-Glucan Content in the Edible Mushroom Pleurotus eryngii

1
Edible Mushrooms Development, MIGAL, Kiryat Shmona 11016, Israel
2
Tel Hai College, Upper Galilee 12210, Israel
3
Institute of Biochemistry, School of Nutritional Sciences, Food Science and Nutrition, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot 76100, Israel
4
Department of Plant Pathology and Microbiology, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot 76100, Israel
*
Authors to whom correspondence should be addressed.
Received: 14 June 2017 / Revised: 12 July 2017 / Accepted: 13 July 2017 / Published: 18 July 2017
(This article belongs to the Special Issue Glucan: New Perspectives on Biochemistry and Application)
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Abstract

Mushroom polysaccharides are edible polymers that have numerous reported biological functions; the most common effects are attributed to β-glucans. In recent years, it became apparent that the less abundant α-glucans also possess potent effects in various health conditions. Here we explore several Pleurotus species for their total, β and α-glucan content. Pleurotus eryngii was found to have the highest total glucan concentrations and the highest α-glucans proportion. We also found that the stalks (stipe) of the fruit body contained higher glucan content then the caps (pileus). Since mushrooms respond markedly to changes in environmental and growth conditions, we developed cultivation methods aiming to increase the levels of α and β-glucans. Using olive mill solid waste (OMSW) from three-phase olive mills in the cultivation substrate. We were able to enrich the levels mainly of α-glucans. Maximal total glucan concentrations were enhanced up to twice when the growth substrate contained 80% of OMSW compared to no OMSW. Taking together this study demonstrate that Pleurotus eryngii can serve as a potential rich source of glucans for nutritional and medicinal applications and that glucan content in mushroom fruiting bodies can be further enriched by applying OMSW into the cultivation substrate. View Full-Text
Keywords: α-glucans; β-glucans; Pleurotus species; Pleurotus eryngii; olive mill solid waste (OMSW) α-glucans; β-glucans; Pleurotus species; Pleurotus eryngii; olive mill solid waste (OMSW)
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Avni, S.; Ezove, N.; Hanani, H.; Yadid, I.; Karpovsky, M.; Hayby, H.; Gover, O.; Hadar, Y.; Schwartz, B.; Danay, O. Olive Mill Waste Enhances α-Glucan Content in the Edible Mushroom Pleurotus eryngii. Int. J. Mol. Sci. 2017, 18, 1564.

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