西双版纳野生稻根际细菌群落结构及功能特征分析

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中图分类号：S511.9;S154.3 文献标志码：A 文章编号：2095-6819（2025）04-1043-08 doi：10.13254/j.jare.2024.0436

Abstract：Torevealthecommunitystructureandspeciesdiversityofrhizospheresoilbacteriaintheoriginalhabitatofwildricein Xishuangana，theeildics（OryzagraulatBail，ryfinalisWall，OryufupoonGrif.，）colletedinisa YunanProvincewereselectedastheresearchsubjects.Basedonhigh-throughputsequencingtechnologyandsoilphysicochmical properties，eeplordteactoschtedtedirecsinomposiioofesprebcteracomuitisoftheild ricespeciesandanalyedthefunctionalpredictionofthebacterialcommunities.Theresultsshowedthatsoilorganicmater（SOM），total nitrogen（TN），available potassium（AK）and available nitrogen（AN） content of o ·granulata were significantly higher than those of O.officinalis（ P<0.05 ），indicatingthebestnutrientstatus.Therhizosphere microbiotaofwildricebelongedto6phylaand3genera，inwhich Proteobacteria was the dominant phylum in the three wild rice species with relative abundance more than 70% . The genus with the greatest abundance in o .granulatawasRalstonia 34.53% ），and in o .officinalis（ 25.86% ）and o .rufupogonwas Sphingomonas（ 29.74% ）. AK and SOMcontentandpHwerepositivelycorelatedwiththerelativeabundanceofSphingomonasspp.，whileavailable（AP）andAKcontent were positively correlated with relative abundances of Ralstonia spp.and Sphingomonas spp.（ P<0.05 ）.Carbohydrate and amino acid metabolismpathaysweretheainfunctionalomponents，speciallpromientinthesythesisanddegradationofketonebodiesand bacterialchemotais.Ingneralignificantdiferenceexistineichessommunityucture，andfuncioaldivesityofte rhizospheremicrobiotaamong thethreewildricespecies.Theresultsenrichtheiologicalinformationonthestructureandfunctionofwild ricesrhzosphrecteralommuitis，ndmayprovideoreicalasisfortonseationndatioalutlatiofteocsf wild rices.

Keywords：wildrice;izospheremicrobiota;soilphysicalandchemicalcharacteristics;communitystructure;functionalprdiction

在自然条件下，植物与土壤根际微生物之间联系紧密，根际微生物群落为植物根际-土壤的相互作用提供了一个生态位，是最活跃的界面之一。（剩余15338字）