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Fig. 10 | BMC Genomics

Fig. 10

From: De novo transcriptome sequencing of black pepper (Piper nigrum L.) and an analysis of genes involved in phenylpropanoid metabolism in response to Phytophthora capsici

Fig. 10

Histochemical analysis of lignin in stem cross-sections of control and P. capsici,-inoculated black pepper plants. Stem were stained with Wiesner reagents for detecting lignin. Pink staining with the Wiesner reagent indicates the presence of p-hydroxycinnamyl aldehyde end groups in lignin. a, b, e, f Sections from control and P. capsici –inoculated P. flaviflorum (resistant) stems. c, d, g, h Sections from control and P. capsici -inoculated P. nigrum (susceptible) stems. a, b, c, d Sections from control plants 10 d after treatment. e, f, g, h Sections from inoculated plants 10 d after treatment. Adjustments to magnification and illumination were made to allow optimal viewing of individual sections. a, c, e, g: 40×; b, d, f, h: 100×; Blue arrow showed xylem and numbers of lignified xylem bundles, vessels, and interfascicular fibres. Red arrow showed the screens and vessels in phloem

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