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黔中山地不同种植方式茶园土壤真菌群落特征

Characteristics of Fungal Communities in Soils at Tea Plantations of Varied Types in Central Guizhou Mountainous  Areas

  • 摘要: 揭示黔中山地不同种植方式茶园土壤真菌群落结构与功能特征。选择贵州省贵阳市花溪区久安乡3种不同种植方式的茶园(新茶园Tx、普通茶园Tp和碾茶园Tn)作为研究对象,以周边植被马尾松林作为对照,采用高通量测序对土壤真菌ITS扩增片段进行测序,分析不同种植方式茶园土壤真菌群落结构与功能特征。不同种植方式茶园土壤真菌OTUs丰富度表现出:Tx(1636)>Tp(1281)>Tn(1197),茶园土壤真菌群落中子囊菌门(Ascomycota)和担子菌门(Basidiomycota)为优势门类群,未分类刺盾炱菌目(unclassified_o__Chaetothyriales)、曲霉菌科(Aspergillaceae)、三型霉菌科(Trimorphomycetaceae)和黏毛菌科(Myxotrichaceae)等为优势科类群;层级聚类和非度量多维尺度分析结果表明不同种植方式下茶园土壤真菌群落间存在显著差异;CCA分析表明土壤有效磷和有机质是影响茶园土壤真菌群落的重要因子;FUNGuild功能预测结果表明未定义腐生真菌、真菌寄生-未定义腐生生物和杜鹃花类菌根真菌等是茶园土壤真菌群落中的优势功能类群。研究表明不同种植方式茶园土壤真菌群落结构与功能存在一定差异。

     

    Abstract: Structure and functional characteristics of thefungal communities in the soils at tea plantations of varied types in the mountainousregions in central Guizhou were compared. Soil specimens from newly established(Tx), traditional (Tp), and “Tencha” (Tn) plantations, along with those fromthe surrounding Pinus massoniana forests as control, in Jiuan township,Huaxi district, Guiyang were collected for high-throughput sequencing on thefungal ITS amplified fragments. Results The fungal community OTU richness ofthe tea plantations ranked Tx (1636)>Tp (1281)>Tn (1197). Regardless ofplantation type, Ascomycota and Basidiomycota were the dominant phyla, whileunclassified_o__Chaetothyriales, Aspergillaceae, Trimorphomycetaceae, andMyxotrichaceae the dominant families in the soils. On the other hand,significant differences were shown in the hierarchical clustering andnon-metric multidimensional scale analysis. Available P and organic matters insoil were found to be the crucial factors affecting the community propertiesaccording to a CCA analysis. And the FUNGuild predictions suggested theundefined saprotrophic, fungal parasite-undefined saprotrophic, and ericoidmycorrhizal fungi to be major responsible functional groups. The fungalcommunities in soils significantly differed in the structures and functions attea plantations of different types at the region.

     

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