人参根际真菌群落多样性及组成的变化

《人参根际真菌群落多样性及组成的变化》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、人参根际真菌群落多样性及组成的变化　　[摘要]连作障碍导致人参减产减收，影响人参产业的可持续发展。土壤真菌群落参与关键生态过程，其多样性及组成的变化与连作障碍相关。该研究采用高通量测序技术，分析人参根际土壤真菌群落多样性及组成的变化，阐述人参栽培模式对根际微生态的影响，为克服连作障碍提供策略。与森林土壤相比，人参根际土壤微生物多样性增加，且随着种植年限的增加，多样性增加趋势下降；真菌群落Sordariomycetes，Alatospora，Eurotiomycetes，Leotiomycetes，Saccharomycetes，Mucorales，Pezizom

2、ycetes的丰度增加。皮尔森相关分析表明，土壤理化指标影响人参根际真菌群落的丰度，pH与Dothideomycetes和Alatospora的丰度显著相关，有效钾含量与Dothideomycetes，Alatospora，Mucorales的丰度显著相关，土壤总氮含量与Sordariomycetes，Mucorales的丰度显著相关。结果表明，施肥是影响人参根际微生态的关键因素之一，优化施肥体系是克服人参连作障碍的有效途径之一。　　[关键词]人参；连作障碍；根际微生态；真菌；高通量测序　　[Abstract]Continuouscroppingobstacle

3、sresultedintheyieldlossesofPanaxginseng，andaffectedthedevelopmentofginsengindustry.Soilfungalcommunitiesparticipatedinthekeyecologicalprocess，andtheirchangesofdiversityandcompositionwererelatedtothecontinuouscroppingobstacles.Weanalyzedthechangesoffungaldiversityandcompositionintherh

4、izosphereofginsengusingthehigh-throughputsequencingmethod，statedtheeffectsofginsengcultivationonthemicro-ecology，andprovidedeffectivestrategiesforovercomingcontinuouscroppingobstacles.Comparedtothoseoftheforestsoils，thefungaldiversityofginsengrhizospheresoilswasincreased，andtheincrea

5、singtrendsweredeclinedwithanincreasingyearsofginsengcultivation；therelativeabundanceofSordariomycetes，Alatospora，Eurotiomycetes，Leotiomycetes，Saccharomycetes，MucoralesandPezizomyceteswereincreasedintherhizosphereofginseng.Pearson′scorrelationindexindicatedthatsoilchemicalperportiesaf

6、fectedtherelativeabundanceoffungalcommunities.pHwassignificantlyrelatedtotherelativeabundanceofDothideomycetesandAlatospora；thecontentofavailablepotassiumwasmarkedlyassociatedwiththerelativeabundanceofDothideomycetes，AlatosporaandMucorales；thecontentoftotalnitrogenwassignificantcorre

7、lationwiththerelativeabundanceofSordariomycetesandMucorales.Theseresultsindicatedthatfertilizationwasoneofpivotalfactorsaffectingtherhizospheremicro-ecologyofginseng，andoptimizationoffertilizationsystemwasaneffectivemethodtoovercomecontinuouscroppingobstacles.　　[Keywords]Panaxginseng

8、；continuousc