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. 2017 Oct 11;19(4):1029–1044. doi: 10.1111/mpp.12580

Figure 2.

Figure 2

Phytomonas sp. and palm infections. (A, B) Scanning electron micrographs of Phytomonas serpens cells in culture (scale bars, 10 and 1 μm). (Courtesy of Martina Tesařová.) (C) Transmission electron micrographs of Phytomonas sp. flagellates in the phloem of coconut palms affected by hartrot. C, companion cell; F, fibre; M, immature metaxylem; P, phloem parenchyma cell; S, sieve elements free of flagellates. (a) Transverse section of a differentiating vascular bundle, showing recently matured sieve elements filled with flagellates (scale bar, 10 μm). (b) Transverse section of the phloem in palm with advanced symptoms (scale bar, 5 μm). (c) Transverse section of a dividing flagellate (scale bar, 0.5 μm). (d) Longitudinal section of a sieve element filled with flagellates. Arrows indicate the kinetoplast DNA (scale bar, 1 μm). (Reproduced from Parthasarathy et al., 1976.) (D) Coconut palms with symptoms of hartrot. (Photograph: Monica L. Elliott, Professor, Plant Pathology, University of Florida, Institute of Food and Agricultural Sciences (UF/IFAS), Gainesville, FL, USA.)