不同种植年限薰衣草根际土壤真菌群落结构的演变

土壤真菌群落结构和多样性对植物生长起着重要作用，了解种植年限对薰衣草根际土壤真菌群落结构的影响对薰衣草病害防治和增产的研究具有重要意义。探究不同种植年限薰衣草根际土壤真菌群落结构和多样性特征，及其随种植年限的演变规律。采集新疆伊犁霍城县种植年限1、3、5 a,以及未种植薰衣草土壤，对ITS序列进行Illumina高通量测序。对测序结果进行分析，比较各样品组真菌多样性和群落分布规律及与种植年限的关联。结果表明，Alpha多样性分析显示随着种植年限的增加Shannon指数逐渐降低，而Chao1指数先降低后增高。在种植薰衣草土壤中共检测到12个门，28个纲，72个目，146个科，236个属。在门水平上，子囊菌门(Ascomycota)、担子菌门(Basidiomycota)、球囊菌门(Glomeromycota)为优势菌门。随着种植年限的增加，子囊菌门相对丰度逐渐降低，担子菌门逐渐增高，而球囊菌门先增加后降低。在属水平上优势菌属为Xylodon、锐孔菌属(Oxyporus)、镰刀菌属(Fusarium)、枝孢属(Cladosporium),均属于植物致病菌。随着种植年限的增加，Xylodon...

Evolution of Fungal Community Structure in Lavender Rhizosphere Soil with Different Planting Life

The structure and diversity of soil fungi play important role to plant growth. Understanding of the soil fungal community structure and diversity with different planting life is of important significance for the study on lavender disease control and increase production. Structure and diversity characteristics of fungal communities in soils of Lavandula angustifolia with different planting life were studied. The samples were collected from L. angustifolia soils planting life for one year, three years, five years, and soils have not yet planted with lavender in Hunching county, Yili, Xinjiang. Illumine high-throughput sequencing of ITS sequences were used to compare the association of fungal diversity and community distribution axiom of the different sample groups with planting life. Alpha diversity analysis showed that Shannon index gradually reduced as the planting life increased, Chao1 index decreased then increased. The fungal communities totally were detected 12 phyla, 28 classes, 72 orders, 146 families, and 236 genera. Ascomycota, Basidiomycota and Glomeromycota were the dominant fungal phyla. Concomitant with the increment of planting life the relative abundances of Ascomycota gradually decreased, the relative abundances of Basidiomycota gradually increased, and the relative abundances of Glomeromycota increased first and then decreased with continuous increment of planting life. At genus level the dominant genera were Xylodon, Oxyporus, Fusarium and Cladosporium belong to plant pathogens. And following the planting life increased, the relative abundances of Xylodon decreased, but the relative abundances of Oxyporus, Fusarium and Cladosporium increased with the increment of planting life. The OTU number of Glomus the most dominant arbuscular mycorrhizal fungi (AMF) reduced gradually with continuous planting life. The continuous planting of L. angustifolia changed fungal community structure, fungal community diversity, increased plant pathogens, and reduced AMF. The research provide theoretical basis for pathogen control and yield increase of lavender, and provided reference basis for lavender soil management.