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. 2020 May 28;9(6):686. doi: 10.3390/plants9060686

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© 2020 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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Fluorescence microscopy of young leaf midrib and young stem sections of T. ventricosa. (a) Auto-fluorescence of laticifer cell in leaf section showing intense blue fluorescence indicating the presence of phenolics. (b) Positive auto-fluorescence stain of stem section indicative of phenolics. (c,d) Leaf and stem sections stained orange-red using Acridine Orange indicating non-lignified laticifer contents. (e,f) Positive staining for cellulose using Calcofluor White on leaf and stem sections. Arrows refer to laticifer.