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首页> 美国卫生研究院文献>Plants >Co-Occurrence of Defoliating and Non-Defoliating Pathotypes of Verticillium Dahliae in Field-Grown Cotton Plants in New South Wales Australia
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Co-Occurrence of Defoliating and Non-Defoliating Pathotypes of Verticillium Dahliae in Field-Grown Cotton Plants in New South Wales Australia

机译：在澳大利亚新南威尔士州田间种植的棉花植物中黄萎病的黄萎病和非黄萎病致病菌共存

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摘要

Verticillium wilt (VW) is a major constraint to cotton production in Australia and worldwide. The disease is caused by a soilborne fungus, , a highly virulent pathogen on cotton. Commonly, is designated into two pathotypes: defoliating (D) and non-defoliating (ND), based on induced symptoms. In the previous two survey seasons between 2017 and 2019, stems with suspected VW were sampled for the confirmation of presence and distribution of D and ND pathotypes across New South Wales (NSW), Australia. A total of 151 and 84 VW-suspected stems sampled from the 2017/18 and 2018/19 seasons, respectively, were subjected to pathogen isolation. Of these, 94 and 57 stems were positive for ; and 18 and 20 stems sampled respectively from the two seasons yielded the D pathotype isolates. Two stems from the 2017/18 season and one stem from 2018/19 season yielded both D and ND pathotype isolates. We also successfully demonstrated the co-infection of both pathotypes in pot trials, which was driven predominantly by either of the pathotypes, and appeared independent on vegetative growth, fecundity and spore germination traits. Our study is the first report of the natural co-occurrence of both D and ND pathotypes in same field-grown cotton plants in NSW, to which a challenge to the disease management will be discussed.
机译：黄萎病是澳大利亚和世界范围内棉花生产的主要限制因素。该疾病是由土壤真菌引起的，土壤真菌是棉花上的一种高毒力病原体。通常，根据诱发的症状分为两种病型：脱叶（D）和非脱叶（ND）。在2017年至2019年的前两个调查季节中，对疑似大众的茎进行了采样，以确认澳大利亚新南威尔士州（NSW）的D型和ND型致病菌的存在和分布。分别从2017/18和2018/19季节分别取样了151和84个大众怀疑的茎进行病原体分离。其中94和57个茎为阳性。分别从两个季节取样的18和20个茎产生了D型分离株。来自2017/18季节的两个茎和来自2018/19季节的一个茎产生D和ND致病型分离物。在盆栽试验中，我们还成功地证明了两种病态的共感染，这主要是由任何一种病态引起的，并且表现出与营养生长，繁殖力和孢子萌发性状无关。我们的研究是在新南威尔士州相同田间种植的棉花植物中，D和ND病原体自然共存的第一个报道，将讨论对疾病管理的挑战。

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