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首页> 外文期刊>Mycologia >Parasitism and measurement of damage to Fusarium oxysporum by species ofMelanospora, Sphaerodes, and Persiciospora
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Parasitism and measurement of damage to Fusarium oxysporum by species ofMelanospora, Sphaerodes, and Persiciospora

机译：黑孢菌，球孢菌和过孔孢菌种对尖孢镰刀菌的寄生和危害测定

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摘要

Five pyrenomycete isolates found in association with different form species of Fusarium oxysporum were evaluated for their in vitro ability to parasitize the watermelon wilt pathogen (IF. oxysporum f. sp. niveum). Several assays were also developed that attempted to measure damage to the wilt pathogen directly in culture. The pyrenomycetes used for pathogenicity and parasitism tests included three isolates of Sphaerodes retispora var. retispora, and one each of Melanospora zamiae and Persiciospora moreaui. A collection of 24 different isolates of F. oxysporum was employed to define a parasitic host range for this group of pyrenomycetes within the species oxysporum. The ability to sporulate on the Fusarium hosts was the primary criterion used for establishing host ranges. Results indicated that all five isolates were capable of parasitizing the wilt pathogen, but P. moreaui was the only one that caused no detectable damage in both the aerial hyphal reduction and growth inhibition assays. Melanospora induced significant damage with the growth inhibition assay only. Significant differences were observed among and between the pyrenomycetes and the different form species in terms of ability to parasitize and reproduce.
机译：评估了五个与不同形式的镰孢镰刀菌相关的丙酮酸菌分离物的体外寄生西瓜枯萎病原菌的能力（IF。oxysporum f。sp。niveum）。还开发了几种测定法，试图直接测量培养物中对枯萎病原体的损害。用于致病性和寄生性测试的拟杆菌属包括三种分离的球形变种Sphaerodes retispora var。 retispora，以及黑变菌和Persiciospora moreaui之一。收集了24种不同的葡萄孢菌分离株，为该菌种中的这些拟除虫菌定义了寄生宿主范围。在镰刀菌宿主上形成孢子的能力是用于建立宿主范围的主要标准。结果表明，所有五个分离株都能够寄生枯萎病原体，但是在空气菌丝减少和生长抑制试验中，P。moreaui是唯一未引起可检测到破坏的分离株。 Melanospora仅通过生长抑制试验诱导了明显的损害。在寄生虫和不同形式物种之间以及之间的寄生虫和繁殖能力方面观察到了显着差异。

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