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首页> 外文期刊>The New Phytologist >High cyanobiont selectivity of epiphytic lichens in old growth boreal forest of Finland
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High cyanobiont selectivity of epiphytic lichens in old growth boreal forest of Finland

机译：芬兰老龄北方森林中附生地衣的高氰化物选择性

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Here, cyanobiont selectivity of epiphytic lichen species was examined in an old growth forest area in Finland. Samples of the eight lichen species were collected from the same aspen (Populus tremula) and adjacent aspens in the same stand. The cyanobionts of these samples were compared with free and symbiotic Nostoc obtained from other habitats and geographic regions. Our results, based on the phylogenetic analysis of a partial small subunit of the ribosomal DNA (16S rDNA) and the rbcLX gene complex did not show any correlation with the geographic origin of the samples at any spatial scale. Instead, there was a correlation between the cyanobionts and the alleged taxonomy of their mycobionts. The results indicate that the lichen species examined are highly selective towards their cyanobiont partners. Only Lobaria pulmonaria proved to be more flexible, being able to associate with a wide range of Nostoc. A same Nostoc strain was found to form associations with taxonomically unrelated lichens indicating that the cyanobiont-mycobiont associations as a whole were not highly specific in the examined species.
机译：在这里，在芬兰一个古老的生长森林地区，研究了附生地衣物种的氰基苯甲酸酯选择性。八种地衣物种的样品是从同一林木中的同一白杨（Populus tremula）和相邻白杨中采集的。将这些样品的氰化物与从其他生境和地理区域获得的游离和共生的Nostoc进行了比较。基于对核糖体DNA（16S rDNA）和rbcLX基因复合体的部分小亚基的系统发育分析，我们的结果在任何空间尺度上均未显示与样品的地理起源相关。取而代之的是，在氰基生物体和据称的其真菌生物体分类之间存在相关性。结果表明，所检查的地衣物种对其蓝藻伴侣具有高度选择性。事实证明，只有肺炎小球菌可以更灵活地结合多种Nostoc。发现相同的Nostoc菌株与分类学上不相关的地衣形成关联，表明在所研究的物种中，氰基蓝霉菌-真菌生物体关联整体上不是高度特异性的。

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