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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/).
(A) Size of the basal leaves of saplings at the two-years old stage, (B) at the five-years old development stage of young plant, (C) at the seven-years old development stage of mature plant.