作者：李聪,乌有汗,姚庆智
单位：内蒙古农业大学生命科学学院，内蒙古 呼和浩特 010018
关键词：兴安落叶松,华北落叶松,可培养内生真菌,多样性指数,相似性系数
基金：内蒙古自治区科技计划(2019GG002),内蒙古农业大学生命科学学院创新团队项目(TD202103)
以内蒙古地区兴安落叶松分布的3个林区及华北落叶松分布的4个林区为采样点。以兴安落叶松和华北落叶松的根系为研究对象，采用组织分离法从根段分离培养得到根系内生真菌，结合形态特征和rDNA ITS区序列分析进行综合鉴定。然后对不同树种及同一树种不同样地的根系内生真菌群落组成和多样性进行差异分析。结果显示，共分离得到225株可培养内生真菌，分别隶属于3纲4目9科17属31种，其中，深色有隔内生真菌(dark septate endophytes, DSE)类群的分离占比最大，是主要的内生真菌类群。两种落叶松根系共有的内生真菌类群有4种，分别为Cadophora echinata、Phialocephala fortinii、Phi. helvetica和Pleotrichocladium opacum。其中Phi. fortinii和Phi. helvetica分别为兴安落叶松和华北落叶松根系内生真菌的优势种。同时，两种落叶松的根系特有内生真菌物种各不相同，群落结构相似程度较低。华北落叶松根系内生真菌多样性指数和均匀度指数均大于兴安落叶松。兴安落叶松分布的3个样地真菌群落均匀度较低。同一树种不同样地间的相似性系数表明样地地理位置及林分条件相近时群落组成相似程度高。综上所述，两种落叶松根系内生真菌组成存在一定的差异，同一树种不同样地的真菌群落结构也具有明显的不同，但整体内生真菌资源都非常丰富。"/>template{display:none;}.mag-rich-xref-fn { cursor: pointer;}//长视频$(document).ready(function(){if($("#showLongArticleVideo") && $("#showLongArticleVideo").length && $("#showLongArticleVideo").length>0){mag_ajax_update({ele_id:'showLongArticleVideo',url:mag_currentQikanUrl() + "/CN/article/showLongArticleVideo.do?id="+$("#articleId").val()});}});//可视化图谱$(document).ready(function(){if($("#showArticle_knowledgeMap") && $("#showArticle_knowledgeMap").length && $("#showArticle_knowledgeMap").length>0){jQuery.getJSON("/Jwxb/CN/lexeme/existsCnctstInArticle.do?articleID="+$("#articleId").val(), null, function(json){if(json.result){$("#showArticle_knowledgeMap").show();}});}});$(document).ready(function(){var metaDataStr = $.trim($("#article_metaJson").val());if(metaDataStr!=''){eval("window.metaData="+metaDataStr);}if(window.metaData && (!window.metaData.authorNotesCommon_cn && !window.metaData.authorNotesCorresp_cn && window.metaData.authorNotes_cn)){window.metaData.authorNotesCommon_cn = window.metaData.authorNotes_cn;}if(window.metaData && (!window.metaData.authorNotesCommon_en && !window.metaData.authorNotesCorresp_en && window.metaData.authorNotes_en)){window.metaData.authorNotesCommon_en = window.metaData.authorNotes_en;}var _nlmdtdXml = $("#article_nlmdtdXml").val();var magDir = _nlmdtdXml.replace(/\/[^\/]+$/,'');window.metaData.magDir = magDir;new mag_vue({ el: '#metaVue', //dataUrl: mag_currentQikanUrl() + '/EN/article/getRichHtmlJson.do?articleId='+$("#articleId").val(), data:window.metaData, loading:true, doTextFun:function(text){ return doDataJsonText(text); 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来源：2023年第5期
《菌物学报》期刊编辑部
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