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Histopathology of Seed-Borne Infections - Applied Research Center ...

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<strong>Seed</strong> Infection by Viruses 215ptowvvlABVdsptdpsbCDFIGURE 7.5 TEM <strong>of</strong> pollinated ovaries before fertilization showing BSMV particles inpollen tube and its discharge in embryo sac. A, Large aggregate <strong>of</strong> virus particles in a segment<strong>of</strong> pollen tube penetrating the ovary. B, Magnified view <strong>of</strong> large aggregate <strong>of</strong> virus particlesfrom A. Particles are surrounded by dense cytoplasmic material. C, Pollen tube dischargewithin the degenerating synergid. D, Portion from C enlarged to show aggregate <strong>of</strong> virusparticles in the discharge. (Abbreviations: ds, degenerating synergid; i, integument; ow, ovarywall; psb, polysaccharide body; pt, pollen tube; ptd, pollen tube discharge; v, virus particles.)(From Brlansky, R.H., Carroll, T.W., and Zaske, S.K. 1986. Can. J. Bot. 64: 853–858. Withpermission.)

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