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首页> 外文期刊>Plant Pathology Journal >Causal Agents of Root Rot and the Effect of Vesicular-Arbuscular Mycorrhizal Fungi in Seedlings of Rhodiola rosea in Alberta, Canada
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Causal Agents of Root Rot and the Effect of Vesicular-Arbuscular Mycorrhizal Fungi in Seedlings of Rhodiola rosea in Alberta, Canada

机译：加拿大艾伯塔省玫瑰红景天幼苗根腐病的病原体和水泡-丛枝菌根真菌的作用

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摘要

Rhodiola ( Rhodiola rosea ) is a plant with adaptogenic properties and is suitable for cultivation in Alberta, Canada. Disease surveys indicated the occurrence of root rots in rhodiola plantations in the Province. A total of 74 fungal isolates were associated with discoloration and rotting in the crown and root regions of the plants. Among these, 15 isolates were identified as Fusarium sp., three as Pythium sp. and eight as Rhizoctonia sp. This is the first report of root rot in rhodiola in Alberta, Canada. These soil-borne pathogens are the potential threat to the quality and quantity of rhodiola production. Experiments were conducted to determine the effect of vesicular-arbuscular mycorrhizal fungi and these soil pathogens on rhodiola growth and development under greenhouse conditions. Overall results indicated that Fusarium , Pythium and Rhizoctonia sp. are all capable of reducing rhodiola biomass. However, biomass was significantly higher when vesicular-arbuscular mycorrhizal fungi were applied in conjunction with these pathogens or in non-inoculated controls. This suggests that vesicular-arbuscular mycorrhizal fungi could be used as a management tool for the control of seedling root rot diseases of rhodiola.
机译：红景天（Rhodiola rosea）是具有适应原性的植物，适合在加拿大艾伯塔省种植。疾病调查表明，该省红景天人工林中发生了根腐病。总共74种真菌分离物与植物冠和根区域的变色和腐烂有关。其中，鉴定为镰刀菌属的15种，腐霉菌属的3种。八个是Rhizoctonia sp。这是加拿大艾伯塔省红景天根腐病的首次报道。这些土壤传播的病原体对红景天产量和数量的潜在威胁。进行实验以确定在温室条件下水泡-丛枝菌根真菌和这些土壤病原体对红景天生长和发育的影响。总体结果表明，镰刀菌，腐霉菌和根瘤菌属。都能够减少红景天生物量。但是，当将水泡-丛枝菌根真菌与这些病原体联合使用或在未接种的对照中使用时，生物量明显更高。这表明水泡-丛枝菌根真菌可作为控制红景天幼苗根腐病的管理工具。

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