三唑酮拌种对小麦条锈病菌叶部侵染过程的影响

 供试小麦种子用干拌法施药,在一叶期接种小麦条锈菌(Puccinia striiformis West)毒性小种,用整叶透明染色方法研究三唑酮拌种对条锈菌叶部侵染过程的影响.结果表明,由初生吸器形成开始,三唑酮对吸器产生和菌落扩展表现出多方面的影响.拌种植株叶片中条锈菌侵染菌丝的生长和分枝严重受阻,吸器母细胞和吸器形成显著减少,菌落亦不再进一步分化,多数侵染点还出现寄主细胞坏死。这些组织病理学变化与抗病品种的过敏性坏死反应很相似.

THE EFFECT OF TRIADIMEFON USED FOR SEED DRESSING ON PATHOGENESIS OF WHEAT STRIPE RUST

Seedlings from Triadimefon-treated and untreated seeds were inoculated with a virulent race of Puccinia striiformis West.Development of the rust fungus in leaves was examined using whole leaf clearing technique.The effect of Triadimefon appeared to be expressed from the time of first haustorium formation and throughout the period of haustorium production and colony expansion.