A. Semenova Galina, Proplastids and Juvenile Chloroplasts in the Apical Meristem of Flax, Journal of Plant Cell Development, Volume 1, Issue 1, 2022, Pages 31-36, ISSN 2832-5311, https://doi.org/10.14302/issn.2832-5311.jpcd-21-4030. (http://oap-bioscience.orgjpcd/article/1749) Keywords: Linum usitatissimum L; Apical meristem; Ultrastructure of proplastids and juvenile chloroplasts