油菜菌核病致病机理的研究 Ⅳ.病菌侵入途径和附着胞结构的观察

STUDIES ON THE PENETRATING PATHWAY AND APPRESSORIA TYPES OF SCLEROTINIA SCLEROTIORUM

油菜菌核病菌(Sclerotinia sclerotiorum)能从寄主表皮直接侵入,还可以由气孔沿着保卫细胞内侧间接侵入表皮细胞。病菌侵入前能形成单一菌丝顶端膨大的单胞附着胞和多细胞组成的复合侵染垫两种侵染结构。这些结果补充了前人观察的不足。

Direct entry of the intact plant surface and indirect penetration through internaltissue of guard cells in the stomate of the host (Brassica napus) were achieved byhyphae of Sclerotinia sclerotiorum. Two types of appressoria, single-cell appressoriumfrom swollen tip hyphae and multiple-cell infecting cushions were formed on thesurface of culticle prior to penetration.