小麦低反应型抗条锈性的组织病理学研究

利用荧光显微技术研究结果表明,小麦低反应型抗病性的表达出现在初生吸器母细胞形成后,表现为吸器母细胞和吸器形成减少,寄主叶肉细胞坏死,菌落生长受抑。但不同品种间条锈菌受抑程度与寄主细胞坏死的关系有很大差异,根据供试品种的组织病理学特征,可将低反应型抗条锈性区分为4个类型:①寄主细胞早期坏死型;②锈菌早期受抑型;③锈菌抑制滞后型;④晚期坏死抑制型。这一结果说明小麦品种的低反应抗锈性可能有多种机制。

A Histopathological Study on Resistance of Low Infection Type of Wheat to Stripe Rust

The histopathological manifestation of resistant cultivars of low infection type of wheat was examined by fluorescence microscopy at various time after inoculation with uredospores of stripe rust. It was the main histopathological manifestation expressed after the formation of first haustorium mother cell, that the formation of haustorium mother cells and haustoria strongly decreased,necrosis of host cells occurred and the linear growth of fungal colony was inhibited. The cultivars examined showed different characteristics of histopathology and were divided into 4 groupss (1) group 1, on which host cell necrosis occurred soon after the formation of the first hausterium mother cell, (2) group 2, on which early inhibition of fungal growth took place. (3) group 3, on which the inhibition of fungal growth was delayed. (4) group 4, on which showed delayed expression of both the host cell necrosis and inhibitionof fungal growth.