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. 2019 Jan 30;8(2):102. doi: 10.3390/cells8020102

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© 2019 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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Effects of nano-CaCO₃ treatment on the microstructures of P. lactiflora inflorescence stems at four developmental stages. (A) SEM. Sections of inflorescence stem in Control and nano-CaCO₃ treatment. Micrographs of partial enlargement of regions are marked by the arrow. Ep, epidermis; Co, cortex; Pi, pith; Xy, xylem. Bars, 100 µm. (B) TEM. Sections of inflorescence stem in Control and nano-CaCO₃ treatment. CW, cell wall. Bars, 5 µm. S1, flower-bud stage; S2, pigmented stage; S3, unfold-petal stage; S4, full-flowering stage.