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. 2023 Apr 3;12(4):867. doi: 10.3390/antiox12040867

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© 2023 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 (https://creativecommons.org/licenses/by/4.0/).

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Light microscopy images. (A–E) Hand-made transverse leaf sections stained with Sudan III highlight the thick layers of cuticle and the secretory cavities spread in the mesophyll: E. alba (A), E. eugenioides (B), E. fasciculosa (C), E. robusta (D), E. stoatei (E). (F,G) Leaves of E. alba: abaxial surface after bleaching with sodium hypochlorite, showing bright yellow secretory cavities (sc), and their overlying cells (arrows) (F); transverse section showing a secretory cavity containing many drops of brownish yellow EO (G). (H) Transverse section of E. stoatei leaf stained with Sudan III, showing a thick cuticle, and stomata (st); a druse (dr) under the epidermis is also visible. 100 µm bars.