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. 2021 Jan 9;7(1):35. doi: 10.3390/jof7010035

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Light microphotographs of Terfezia-Cistus mycorrhizal roots, (400×): (a) T. arenaria × C. salviifolius root showing rudimentary sheath, (b) T. arenaria × C. ladanifer root showing rudimentary sheath, (c) T. extremadurensis × C. salviifolius root surrounded by a well-developed sheath, (d) T. extremadurensis × C. ladanifer root showing well-developed sheath, (e) T. fanfani × C. salviifolius root showing a less-developed sheath, (f) T. fanfani × C. ladanifer root showing a less-developed sheath, (g) T. pini × C. salviifolius root surrounded by a diffuse sheath, (h) T. pini × C. ladanifer root showing a well-developed sheath.