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  Indian J Med Microbiol
 

Figure 2: Fluorescence micrographs of older salivary sheaths, deposited 5–6 weeks earlier by Diaphorina citri in the petioles and midribs of Candidatus Liberibacter asiaticus-infected (a) or healthy (b) citron leaves. Note that most of the brownish (degrading) parts of the salivary sheaths are in the mesophyll, but those in the phloem are still bluish green (arrows). The section in B was stained with Calcofluor White, which stains fungi and cell walls in blue; only cell walls were stained in blue, but the rusty part of the salivary sheath (arrowhead) was not. Fr: Fibrous ring, mp: Mesophyll parenchyma, ph: Phloem, xy: Xylem. Scale bars = 100 μm

Figure 2: Fluorescence micrographs of older salivary sheaths, deposited 5–6 weeks earlier by <i>Diaphorina citri</i> in the petioles and midribs of <i>Candidatus Liberibacter</i> asiaticus-infected (a) or healthy (b) citron leaves. Note that most of the brownish (degrading) parts of the salivary sheaths are in the mesophyll, but those in the phloem are still bluish green (arrows). The section in B was stained with Calcofluor White, which stains fungi and cell walls in blue; only cell walls were stained in blue, but the rusty part of the salivary sheath (arrowhead) was not. Fr: Fibrous ring, mp: Mesophyll parenchyma, ph: Phloem, xy: Xylem. Scale bars = 100 μm