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烟草炭疽病原研究及拮抗链霉菌鉴定

Jiye LI, Jingjing WANG,Lu YANG,Lijuan PENG

Acta Agriculturae Zhejiangensis(2019)

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Abstract
从贵州省绥阳县分离到1株烟草炭疽病病原,为明确其分类学地位,寻找合适的生防链霉菌株,对其进行形态鉴定和多基因系统发育分析,并研究了其生物学特性,同进行了拮抗链霉菌的筛选鉴定.结果表明,分离到病原菌为瓜类炭疽菌(Colletotrichum orbiculare).该菌可利用的最佳碳源为淀粉,最佳氮源为硝酸钠、蛋白胨和硝酸钾,不能利用草氨酸.最适宜生长温度为25℃,光照和pH值对其生长影响不大.室内平板对峙筛选到2株具有良好拮抗作用的链霉菌F18和F35,F18鉴定为白长链霉菌(Streptomyces albolongus),F35鉴定为抗铅链霉菌(Streptomyces plumbiresistens).
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