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  Indian J Med Microbiol
 

Figure 1: Fluorescence micrographs of cross sections in petioles and midribs of healthy (a-c) or Candidatus liberibacter asiaticus-infected (d) citron leaves 1–2 weeks (a), 3–4 weeks (b), or 5–6 weeks (c and d) postfeeding of Diaphorina citri psyllids. Arrows indicate normal color (bluish-green) salivary sheaths and arrowheads indicate rusty/brownish (degrading) parts of the salivary sheaths. Note that degradation starts at or near the flange (fl) close to the leaf surface and that inner parts of the sheaths in the phloem (ph) are still normal in color. Fl: Flange, fr: Fibrous ring, mp: Mesophyll parenchyma, ph: Phloem, xy: Xylem; Scale bars = 100 μm

Figure 1: Fluorescence micrographs of cross sections in petioles and midribs of healthy (a-c) or <i>Candidatus liberibacter</i> asiaticus-infected (d) citron leaves 1–2 weeks (a), 3–4 weeks (b), or 5–6 weeks (c and d) postfeeding of <i>Diaphorina citri</i> psyllids. Arrows indicate normal color (bluish-green) salivary sheaths and arrowheads indicate rusty/brownish (degrading) parts of the salivary sheaths. Note that degradation starts at or near the flange (fl) close to the leaf surface and that inner parts of the sheaths in the phloem (ph) are still normal in color. Fl: Flange, fr: Fibrous ring, mp: Mesophyll parenchyma, ph: Phloem, xy: Xylem; Scale bars = 100 μm