









摘要[目的]探究不同連作年限西紅花種植土壤中細(xì)菌和真菌群落多樣性以及網(wǎng)絡(luò)結(jié)構(gòu)特征。[方法]采用高通量測序技術(shù)分析不同連作年限西紅花種植土壤微生物群落的多樣性、組成以及網(wǎng)絡(luò)特征差異。[結(jié)果]不同連作年限西紅花種植土壤細(xì)菌和真菌的多樣性發(fā)生明顯變化,尤其是真菌的OTUs、Shannon、Simpson、Chao和ACE指數(shù),隨著連作年限增加呈現(xiàn)明顯增加的趨勢。主坐標(biāo)分析(PCoA)和非度量多維尺度分析(NMDS)結(jié)果表明,不同連作年限西紅花種植土壤中細(xì)菌和真菌群落組成均有明顯差異。放線菌門(Actinobacteria)、變形菌門(Proteobacteria)、酸酐菌門(Acidobacteria)、綠彎菌門(Chloroflexi)和浮霉菌門(Planctomycetes)為4個不同連作年限西紅花種植土壤中豐度前5位的細(xì)菌門。子囊菌門(Ascomycota)在4個連作年限中均為第一大真菌門(相對豐度gt;55%)。種植4年的土壤中放線菌門(Actinobacteria)和芽單胞菌門(Gemmatimonadetes)的豐度低于種植1年、2年和3年。產(chǎn)油菌屬(Solicoccozyma)在連作4年西紅花土壤中豐度顯著高于其他年限(Plt;0.05)。細(xì)菌和真菌的共發(fā)生網(wǎng)絡(luò)分析表明,不同連作年限西紅花種植土壤細(xì)菌和真菌呈現(xiàn)不同的連接模式。[結(jié)論]該研究描繪了不同連作年限西紅花種植土壤微生物多樣性、組成以及網(wǎng)絡(luò)結(jié)構(gòu)的差異,從微生物角度探討西紅花連作障礙機制,為解決西紅花的連作障礙提供參考。
關(guān)鍵詞西紅花;連作年限;土壤微生物;多樣性;網(wǎng)絡(luò)特征
中圖分類號R282.2"文獻標(biāo)識碼A"文章編號0517-6611(2024)24-0137-08
doi:10.3969/j.issn.0517-6611.2024.24.031
開放科學(xué)(資源服務(wù))標(biāo)識碼(OSID):
DifferencesofMicrobialDiversityandNetworkCharacteristicsinCrocussativus-PlantingSoilofDifferentContinuousCroppingYears
LIMeng-zhi1,F(xiàn)ENGMao2,GAOLi1etal
(1.HenanKeyLaboratoryofZhangZhongjingFormulaeandHerbsforImmunoregulation,NanyangInstituteofTechnology,Nanyang,Henan473000;2.NanyangInstituteofTechnology,Nanyang,Henan473000)
Abstract[Objective]ToexplorethediversityandnetworkstructureofbacterialandfungalcommunitiesinsoilmicroorganismofCrocussativusindifferentyearsofcontinuouscropping.[Method]High-throughputsequencingwascarriedouttodeterminethediversity,compositionandnetworkstructureofbacterialandfungalcommunitiesinsoilmicroorganismofC.sativus.[Result]ThediversityofbacteriaandfungiinsoilofC.sativushadsignificantchanges,especiallytheOTUs,Shannon,Simpson,ChaoandACEindicesoffungi,whichshowedasignificantincreasetrendwiththeincreaseofcontinuouscroppingyears.TheresultsofPCoAandNMDSshowedthatthereweresignificantdifferencesinthecompositionofbacteriaandfungiinsoilofC.sativusindifferentyearsofcontinuouscropping.Atthebacterialphylumlevel,Actinobacteria,Proteobacteria,Acidobacteria,ChloroflexiandPlanctomyceteswerethetopfivephyla.Atthefungalphylumlevel,Ascomycota(55%)wasthemostabundantphylum.TherelativeabundanceofActinobacteriaandGemmatimonadeteswerelowerinsoilsofcontinuouscropping4yearthancontinuouscropping1,2and3year.TherelativeabundanceofSolicoccozymawassignifcantlyhigherinsoilsofcontinuouscropping4yearthancontinuouscropping1,2and3year(Plt;0.05).ThereweredifferentconnectivitypatternsofbacteriaandfungiinC.sativus-plantingsoilofdifferentcontinuouscroppingyears.[Conclusion]Thestudydescribesthedifferencesofmicrobialdiversity,compositionandnetworkstructureinC.sativus-plantingsoilofdifferentcontinuouscroppingyears,andexploresthemechanismofC.sativuscontinuouscroppingobstaclesfromamicrobialperspective,providingreferenceforsolvingtheobstaclesofcontinuouscroppinginC.sativus.
KeywordsCrocussativus;Continuouscroppingyears;Soilmicroorganism;Diversity;Networkcharacteristic
西紅花為鳶尾科植物番紅花(Crocus sativus L.)的干燥柱頭[1]。西紅花主要在伊朗、西班牙、摩洛哥、土耳其、印度、希臘、意大利等地種植,目前在我國主要產(chǎn)地為上海、浙江、安徽和河南等省(市)[2-3]。……