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. 2021 Jun 17;254(1):6. doi: 10.1007/s00425-021-03654-9

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© The Author(s) 2021

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 4 — The organization of the monocot cambium. a An increase in monocot cambium circumference is the result of symplastic growth in circumferential direction (green box) whereas an increase in the width of the monocot cambium is the result of symplastic growth in radial direction (orange box). b Criteria for possible identification of the initial cell of the monocot cambium based on the work of Simpson (1975)