Influence of light illumination on water buoyancy of sclerotia of <i>Sclerotium rolfsii</i> isolated from water chestnut and other plants, and comparison of inner structures of these sclerotia

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  • ヒシおよび各種植物から分離された白絹病菌菌核の水面浮上性に及ぼす光の影響と菌核内部構造の比較
  • ヒシ オヨビ カクシュ ショクブツ カラ ブンリサレタ シラキヌビョウキン キ

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<p>　The effect of light illumination on sclerotial buoyancy of 15 strains of Sclerotium rolfsii isolated from water chestnut and 27 strains isolated from other host plants was examined. In most strains, sclerotia formed on V-8 agar medium under light exposure tended to float in water, and sclerotia formed in darkness tended to sink. Buoyancy rates of sclerotia varied with exposure time to light during incubation, and in most strains were about 50% or more for 1 h/d illumination, and about 100% for 12 h/d. Microscopic study revealed that the buoyant sclerotia had broader intercellular spaces in sclerotial tissues, and this structural difference was suggested to be an important factor in sclerotial buoyancy.</p>

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