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首页> 外文期刊>Plant Pathology >The morphology, behaviour and molecular phytogeny of Phytophthora taxon Salixsoil and its redesignation as Phytophthora lacustris sp. nov.
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The morphology, behaviour and molecular phytogeny of Phytophthora taxon Salixsoil and its redesignation as Phytophthora lacustris sp. nov.

机译：疫霉菌类沙柳土壤的形态，行为和分子植物学特征，并将其重新命名为Phytophthora lacustris sp.。十一月

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摘要

Since its first isolation from Salix roots in 1972, isolates of a sexually sterile Phytophthora species have been obtained frequently from wet or riparian habitats worldwide and have also been isolated from roots of Alnus and Prunus spp. Although originally assigned to Phytophthora gonapodyides on morphological grounds, it was recognized that these isolates, informally named P. taxon Salixsoil, might represent a separate lineage within ITS Clade 6. Based on phylogenetic analyses and comparisons of morphology, growth-temperature relationships and pathogenicity, this taxon is formally described here as Phytophthora lacustris sp. nov. Isolates of P. lacustris form a clearly resolved cluster in both ITS and mitochondrial coxl phytogenies, basal to most other Clade 6 taxa. Phytophthora lacustris shares several unusual behavioural properties with other aquatic Clade 6 species, such as sexual sterility and tolerance of high temperatures, that have been suggested as adaptations to riparian conditions. It appears to be widespread in Europe and has also been detected in Australia, New Zealand and the USA. It was shown to be weakly or moderately aggressive on inoculation to Alnus, Prunus and Salix, The extent of P. lacustris' activity as a saprotroph in plant debris in water and as an opportunistic pathogen in riparian habitats needs further investigation. Its pathogenic potential to cultivated fruit trees also deserves attention because P. lacustris has apparendy been introduced into the nursery trade.
机译：自1972年首次从柳柳属根中分离出以来，性不育疫霉菌的分离物经常从世界各地的湿地或河岸生境中获得，也从from木和李属的根中分离出。尽管最初基于形态学原因被分配给了疫霉菌，但已认识到这些分离株（非正式名称为P.taxon Salixsoil）可能代表了ITS Clade 6中的一个单独的谱系。基于系统发育分析和形态，生长温度关系和致病性的比较，该分类单元在这里正式称为Phytophthora lacustris sp。十一月乳酸杆菌的分离物在ITS和线粒体coxl植物遗传学中均形成清晰分辨的簇，以大多数其他Clade 6类群为基础。疫霉菌与其他水生进化枝6种具有一些不同寻常的行为特性，例如性不育和对高温的耐受性，已被认为可以适应河岸条件。它似乎在欧洲很普遍，并且在澳大利亚，新西兰和美国也被发现。它被证明对阿尔努斯，李子和柳属的接种具有弱或中度的侵害性。乳酸杆菌作为水中植物残腐菌的腐烂和作为河岸生境中的机会病原体的活动程度需要进一步研究。它对栽培果树的致病潜力也值得关注，因为已将P. lacustris引入了育苗业。

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