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首页> 外文期刊>Dynamic Soil, Dynamic Plant >Investigation on Fungal Antagonists of Root Rot Agents from the Rhizosphere of White Lupin (Lupinus albus)
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Investigation on Fungal Antagonists of Root Rot Agents from the Rhizosphere of White Lupin (Lupinus albus)

机译：白羽扇豆（Lupinus albus）根际根腐菌真菌拮抗药的研究

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摘要

Crown and root rot of white lupin (Lupinus albus} is quite complex in aetiology as several soil-borne fungal pathogens, such as Pythium ultimum, Rhizoctonia solani and Fusarium spp., are usually recovered from infected plants. A severe outburst of thedisease compromised the crop outcome in a farm located in Campania, southern Italy; notwithstanding, some more or less extended patches of unaffected plants were visible amidst the decaying areas. The presence of fungal antagonists was investigated in the rhizosphere of both healthy and infected plants to verify which species had been stimulated in the presence of a massive inoculum of several pathogens, and if any eventually prevailed in the unaffected patches. The ability of the strains isolated to establish mycoparasitic relationships and/or to inhibit mycelial growth of the above-mentioned pathogens was investigated in vitro. Besides Trichoderma spp. and Clonostachys rosea, whose active development was particularly evident on the outer surface ofthe roots of the infected plants, most species were recovered from both sources. Penicillium restrictum stood out for its prevalence in the rhizosphere of healthy plants, and showed a conspicuous mycoparasitic aptitude that is described for the first time in the present study. The occurrence of two rare Penicillium species, P. glaucolanosum and P. sajarovii, is also reported.
机译：白羽扇豆（Lupinus albus}的冠腐病和根腐病在病因学上非常复杂，因为几种土壤传播的真菌病原体，例如终极腐霉，根瘤菌和镰刀菌等，通常是从受感染的植物中回收的。尽管位于意大利南部坎帕尼亚（Campania）的一个农场的农作物收成良好;尽管在腐烂地区可见到一些或多或少的未受影响植物的扩展斑块，在健康植物和感染植物的根际中均研究了真菌拮抗剂的存在，以验证哪些物种在大量病原体大量接种的情况下，已经刺激了该病原菌，如果最终在未受影响的斑块中盛行，则对分离出的菌株建立霉菌寄生关系和/或抑制上述病原体菌丝生长的能力进行了研究。除了木霉属和玫瑰色克隆菌外，它们的活跃发育在外部尤为明显在受感染植物的根表面，大多数物种都是从两种来源中回收的。限制青霉在健康植物的根际中盛行，脱颖而出，并表现出明显的真菌寄生性倾向，这在本研究中首次得到描述。还报告了两种稀有的青霉菌物种青霉菌和沙雷氏疟原虫的发生。

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