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. 2021 May 4;12:2508. doi: 10.1038/s41467-021-22815-8

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© The Author(s) 2021

Open Access This 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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 1 — a The morphology of 1-week-old, 2-week-old, 3-week-old, and 4-week-old wild-type and p35S:AHL15 seedlings and plants grown in long day conditions (16 h photoperiod). b Two-week-old p35S:AHL15 Arabidopsis seedling with somatic embryos on the cotyledons (arrowheads). c, d Scanning electron micrographs showing torpedo stage somatic embryos on p35S:AHL15 cotyledons (c) or the secondary somatic embryos formed on a p35S:AHL15 primary somatic embryo (d). e The morphology of a 3-week-old AHL15 overexpression-induced embryonic mass following secondary SE. f The morphology of a 2-month-old embryonic mass formed from a p35S:AHL15 seedling. Size bars indicate 0.5 cm (a) and 1 mm (b–f). a–f Similar results were obtained from four independent experiments.