Ultrastructure of Infection of Cyst Nematode Eggs By the Nematophagous Fungus Verticillium Suchlaspori Um
Ultrastructure of Infection of Cyst Nematode Eggs By the Nematophagous Fungus Verticillium Suchlaspori Um
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食线虫黄萎病菌侵染包囊线虫卵的超微结构
DOI：
10.1163/187529293x00042
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发表时间：
1993
期刊：
影响因子：
--
通讯作者：
W. M. Robertson
中科院分区：
文献类型：
--
作者：
L. V. Lopez;W. M. Robertson
超微结构研究表明，从燕麦异种线虫卵中分离到的黄萎菌菌株，在体外感染了麦长管虫和苍白球藻的卵。在麦长管圆线虫中，这样的芽胞杆菌在侵染点形成附着体。在连续切片中，观察到一个细长的穿透菌丝穿透蛋壳，形成感染鳞茎。还发现了其他类型的穿透菌丝和萌发的分生孢子。经常观察到低电子密度的区域，这表明苏氏弧菌分泌酶来削弱蛋壳。苍白粉虫卵的穿透能力与麦长管虫相似，但卵壳厚度是麦长管虫的两倍(约500 nm)。苏氏弧菌侵染孢囊线虫卵的超微结构与其他食线虫真菌具有共性。
Ultrastructural studies showed that strains of Verticillium suchlasporium isolated from eggs of Heterodera avenae, infected in vitro eggs of H. avenae and Globodera pallida. In H. avenae, V suchlasporium formed appressoria at the point of infection. In serial sections it was observed that a narrow penetration hypha perforated the egg-shell and formed an infection bulb. Other types of penetration hyphae and germinating conidia were also found. Areas of low electron-density were frequently observed, suggesting the secretion of enzymes by V. suchlasporium to weaken the egg-shell. Penetration of eggs of G. pallida was similar to that described for H. avenae, but the egg-shell of G. pallida was twice as thick as that of H. avenae (approximately 500 nm). Ultrastructure of infection of cyst nematode eggs by V. suchlasporium has features in common with other nematophagous fungi.