Effects of fungal parasites on cereal cyst nematode (Heterodera avenae Woll.) from naturally infested soil : a scanning electron microscopy study
Effects of fungal parasites on cereal cyst nematode (Heterodera avenae Woll.) from naturally infested soil : a scanning electron microscopy study
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真菌寄生虫对自然侵染土壤中谷物胞囊线虫（Heterodera avenae Woll.）的影响：扫描电子显微镜研究
DOI：
10.1139/m91-033
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发表时间：
1991
影响因子：
2.8
通讯作者：
G. Duncan
中科院分区：
文献类型：
--
作者：
L. V. Lopez;G. Duncan
通过低温扫描电子显微镜研究了真菌体内寄生虫的影响、攻击谷物胞囊线虫燕麦芽孢杆菌卵的影响以及感染过程的细节。一些雌性线虫，甚至是不含卵的幼虫，都被真菌定殖。在感染标本中发现了与雌性线虫相似的孢子和菌丝。真菌在根和线虫中定殖。在感染的早期阶段，真菌在雌性线虫的器官之间发育，可能以雌性线虫的身体作为食物来源。在一些未成熟的雌性中，真菌似乎已经破坏了子宫。在年老雌性体内，黄萎病菌（包括厚垣弧菌）的附着体渗透到其所含的卵中，并逐渐破坏其内容物，直到卵壳充满菌丝和孢子。卵内的第二阶段幼体很少被这些真菌感染。鸡蛋的真菌感染，会在早期阶段阻止其发育，因此......
The effects of fungal endoparasites, attacking the eggs of the cereal cyst nematode Heterodera avenae, and details of the infection process were studied by low-temperature scanning electron microscopy. Some female nematodes, even young ones containing no eggs, were colonized by fungi. Spores and hyphae similar to those of Nematophthora gynophila were found in infected specimens. Fungi colonized both roots and nematodes. In early stages of infection, fungi developed within the female nematode between the organs, presumably using the female's body as a food source. In some immature females, the fungi appeared to have destroyed the uterus. In old females, appressoria of Verticillium spp., including V. chlamydosporium, penetrated the eggs they contained and progressively destroyed their contents until the egg shell was filled with hyphae and spores. Only rarely were second-stage juveniles within eggs infected by these fungi. Fungal infection of eggs, which arrests their development at an early stage, therefor...