作者：梁玲瑜, 王慧敏, 刘福, 吕全
单位：中国林业科学研究院森林生态环境与自然保护研究所 国家林业和草原局森林保护学重点实验室，北京 100091
关键词：Geosmithia,形态学,系统学分析,致病性,新种
基金：国家自然科学基金(32201569),国家自然科学基金(32230071),国家自然科学基金(32071769)
Geosmithia (子囊菌门，肉座菌目)是常见的小蠹虫伴生真菌，其中部分类群能够入侵寄主并引起严重的植物病害。本研究通过真菌的分离培养，鉴定中国西南地区华山松切梢小蠹Tomicus armandii伴生真菌新种，并通过有伤接种实验对其致病性进行评估。对来自云南省玉溪市和富源县的45只华山松切梢小蠹成虫及64个坑道进行分离，获得387株Geosmithia属菌株，选取10株代表性菌株比较形态、生理特征并进行系统发育(ITS、TUB2和TEF1-α序列片段)分析。其中90个菌株用于构建ITS树，66个菌株用于TUB树，TEF树包含77个菌株。研究发现387株菌株代表1个新种，命名为Geosmithia armandii，G. armandii是第一个报道与华山松切梢小蠹伴生的Geosmithia属真菌。选取两株菌株接种至3年生华山松幼苗进行致病性测定，接种1个月后发现处理组接种处坏死病斑长度与对照组相似，结果表明该新种为弱致病菌。本研究为今后Geosmithia与华山松切梢小蠹伴生关系的研究奠定基础，为防治华山松切梢小蠹提供新思路。"/>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：2024年第6期
《菌物学报》期刊编辑部
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