Nam Yoon-Jong, Kim Hyun, Lee Jin-Hyung, Yoon Hyeokjun, Kim Jong-Guk
Department of Life Sciences and Biotechnology, Kyungpook National University.
J Gen Appl Microbiol. 2015;61(3):67-74. doi: 10.2323/jgam.61.67.
Ulleungdo and Dokdo are volcanic islands that experience a characteristic marine climate, influenced by warm currents. The richness and diversity of the plant species, particularly vascular plants, are higher on Ulleungdo than on Dokdo. In contrast to the native plant life, little is known about the diversity of soil fungi living in the rhizosphere of these two islands. In this study, we utilized the barcoded pyrosequencing method to analyze rhizosphere soil fungi on Ulleungdo and Dokdo. In total, 768 operational taxonomic units (OTUs) were analyzed from the Ulleungdo samples, while 640 OTUs and 382 OTUs were analyzed from the Dongdo and Seodo (islets of Dokdo) samples, respectively. Species richness was considerably higher in the Ulleungdo samples than in the Dongdo and Seodo samples, while there was little difference in species diversity between the samples. The taxonomic composition analyses demonstrated that members of the phylum Basidiomycota dominated the Ulleungdo samples, whereas members of the phylum Ascomycota were predominant in the Dokdo samples. Ectomycorrhizal fungi belonging to the phylum Basidiomycota, in particular, were more abundant in the Ulleungdo samples. This finding suggests that the difference in the abundance of the ectomycorrhizal fungi in the rhizospheres of Ulleungdo and Dokdo may have been affected by species richness and diversity of the vascular plants. Our study is the first detailed report of the composition of soil fungal communities on the Ulleungdo and Dokdo islands. In addition, our findings provide a basis for understanding the ecological interactions between plants and fungi.
郁陵岛和独岛是受暖流影响具有独特海洋气候的火山岛。郁陵岛的植物物种，尤其是维管植物的丰富度和多样性高于独岛。与本地植物群落不同，对于这两个岛屿根际土壤真菌的多样性了解甚少。在本研究中，我们利用条形码焦磷酸测序方法分析了郁陵岛和独岛的根际土壤真菌。郁陵岛样本共分析了768个操作分类单元（OTU），而独岛的东岛和西岛样本分别分析了640个OTU和382个OTU。郁陵岛样本的物种丰富度明显高于东岛和西岛样本，而样本间的物种多样性差异不大。分类组成分析表明，担子菌门成员在郁陵岛样本中占主导地位，而子囊菌门成员在独岛样本中占优势。特别是担子菌门的外生菌根真菌在郁陵岛样本中更为丰富。这一发现表明，郁陵岛和独岛根际外生菌根真菌丰度的差异可能受到维管植物物种丰富度和多样性的影响。我们的研究是郁陵岛和独岛土壤真菌群落组成的第一份详细报告。此外，我们的研究结果为理解植物与真菌之间的生态相互作用提供了依据。
