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. 2017 Jan 31;119(6):1021–1033. doi: 10.1093/aob/mcw275

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© The Author 2017. Published by Oxford University Press on behalf of the Annals of Botany Company.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 7. — Lignins and phenolic compounds in stomatal guard cells. Lignin (blue) and phenolic compounds (red) autofluorescence was observed in leaf fragments using confocal microscopy (A, C, E, G, I, K) and by phloroglucinol stain in epidermal peels (B, D, F, H, J, L). (A, B) Asplenium – note the phenolic compound autofluorescence in the nuclei and red autofluorescence of the ventral wall; (C, D) Platycerium – note the red autofluorescence of the ventral wall (white arrow); (E, F) Arabidopsis; (G, H) Commelina; (I, J) Sorghum; (K, L) Triticum. N, nucleus; PW, polar end-wall; VW, ventral wall; DW, dorsal wall. Scale bars = 20 µm.