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

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Seed Infection by Viruses 213floretsspikeinfected plant(+)rachis (+)lemma (+)palea (+)fertileappendagesantherprimordia (+)pistilprimordia (+)antherwallepidermis (+)middle layers (+)tapetum (+)malearchesporium (+)microsporemother cells (+)seedling(+)seedendosperm (+)pericarpseed coat (+)endosperm (+)embryo (+)ovule—primary endopermcell (+)integument (+)nucellus (+)femalearchesporium(+)megasporemother cell (+)dyad, tetrad &functionalmegaspore (+)2-, 4-, 8-,nucleate (+)embryo sacsorganisedembryo sacdyad (+)tetrad (+)microspores (+)vegetative cell(+)cytoplasm(+)antipodalcells (+)central cell(+)synergids (+)egg (+)pollen grainssperms(+)nucleus(+)embryo (+)—zygote (+)fertilized embryo sacpollination andfertilizationFIGURE 7.3 Schematic representation of infection cycle of BSMV seed-transmitted strainin barley. (+) = presence of virus. (-) = absence of virus. (Based on the publications of Carrolland co-workers.)antigen has been observed in the ovule, microspores, pollen grains, and anthertapetum, but not in the embryo sac (Pesic, Hiruki, and Chen, 1988) and seed coat(Pesic and Hiruki, 1986). Baillis and Offei (1990) have concluded that AMV invadesthe female reproductive organs of most flowers systemically.Similarly, southern bean mosaic virus (SBMV) and soybean mosaic virus (SMV)occur in all flower parts, green pods, immature seeds, and seed coat and embryo ofmature seeds (Cheo, 1955; Bowers and Goodman, 1979). According to Yang andHamilton (1974) tobacco ringspot virus (TRSV) particles are contained in the pollen,integuments, nucellus, embryo sac wall, and cells in soybean. Earlier Athow andBancroft (1959) found TRSV in embryo, but not in the seed coat of soybean seed.
214 Histopathology of Seed-Borne InfectionsABnunecbvcCFIGURE 7.4 TEM micrographs of barley stripe mosaic virus (BSMV)-infected pollen grainsof barley. A, Part of mature pollen grain containing two sperm cells having BSMV particles.B, Part from A magnified showing slightly enlarged view of the sperm cell. C, Portion outlinedin B magnified to show BSMV infection in sperm cell. Note virions (arrows) in the nucleusand cytoplasm of the sperm cell. (Abbreviations: cb, cell boundary; nu, nucleus; ne, nuclearenvelope, all of the sperm cell; vc, vegetative cell.) (From Carroll, T.W. 1974. Virology 60:21–28. With permission.)
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Histopathology ofSeed-Borne Infecti
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PrefaceThe book deals with only one
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The AuthorsDalbir Singh, Ph.D., for
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ContentsChapter 1 Introduction ....
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4.3.2 Routes for Infection from Ova
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8.4 Survival in Seed ..............
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2 Histopathology of Seed-Borne Infe
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4 Histopathology of Seed-Borne Infe
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2Reproductive Structuresand Seed Fo
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Reproductive Structures and Seed Fo
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14 Histopathology of Seed-Borne Inf
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3Structure of SeedsThe seed habit i
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Structure of Seeds 49(1971) of usin
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Structure of Seeds 51is found in as
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Structure of Seeds 53dry seed of Ly
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Structure of Seeds 553.3.2 SEED COA
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Structure of Seeds 57Endosperm: One
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Structure of Seeds 59scendembepsmuA
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Structure of Seeds 61Endosperm: Sca
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Structure of Seeds 63Chalaza simple
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Structure of Seeds 65stystypmerA Bc
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Structure of Seeds 67epsent endCADB
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Structure of Seeds 69perhscendembpe
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Structure of Seeds 71eposgepi′epo
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Structure of Seeds 73(Zea and Sorgh
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Structure of Seeds 75Baker, D.M. an
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Structure of Seeds 77Maheshwari Dev
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Structure of Seeds 79Vries, M.A. de
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TABLE 5.6Location of Mycelium of St
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Page 214 and 215: 7Seed Infection by VirusesViruses a
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Page 222 and 223: Seed Infection by Viruses 2073. The
Page 224 and 225: Seed Infection by Viruses 209Wilcox
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Page 234 and 235: Seed Infection by Viruses 219seed(s
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Page 238 and 239: Seed Infection by Viruses 223REFERE
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