AbstractElectron microscope observations ofCeratocystis ulmi‐induced tylosis development in 3 species of elm were made during the first 2 weeks after artificial inoculation. Tylosis forming from both ray and vasicentric parenchyma occluded vessels adjacent to those containing the fungus conidia within one day after inoculation. The expanding protoplast forced the intact vessel‐parenchyma “pit membrane” and protective layer through the pit into the vessel lumen. Cell organization during this expansion is discussed. The observations on tylosis development for the 3 elms used were id
展开▼
机译:摘要在人工接种后2周内,用电镜观察了3株榆树中Ceratocystis ulmi诱导的tylosis病的发展。在接种后一天线和血管中心薄壁组织都阻塞了与含有真菌分生孢子的血管相邻的血管,从而形成暴风病。膨胀的原生质体迫使完整的血管薄壁组织“凹陷膜”和保护层通过凹陷进入血管腔。讨论了这种扩增过程中的细胞组织。对所用 3 棵榆树的 tylosis 发展的观察结果是 id
展开▼