青刺果内生真菌PUR-01的分离?鉴定及抗性评价
2021-05-11郑鹏张玥寇灿
郑鹏 张玥 寇灿



摘要 从青刺果植株中首次分离得到菌株PUR-01,并对其进行分离纯化、抗性评价、形态学分析及分子生物学鉴定,探讨该菌株对2种热带作物病原真菌的抑菌活性研究。结果表明,青刺果内生真菌PUR-01对橡胶树胶孢炭疽病菌(Colletotrichum gloeosporioides)和香蕉尖孢镰刀菌古巴专化型(Fusarium oxysporum f.sp.Cubense,Foc)均有一定的抑制作用,抑菌率分别为34%和24%,为进一步开展该菌株生防作用机理及应用研究提供基础。通过形态学及分子生物学鉴定,该菌为链格孢属(Alternaria alternata)真菌。
关键词 青刺果;内生真菌;分离;鉴定;抗性评价;橡胶树胶孢炭疽病菌;香蕉尖孢镰刀菌古巴专化型
中图分类号 Q93文献标识码 A
文章编号 0517-6611(2021)08-0005-03
doi:10.3969/j.issn.0517-6611.2021.08.002
开放科学(资源服务)标识码(OSID):
Study on Isolation,Identification and Resistance Evaluation of Endophytic Fungi PUR-01 from Prinsepia utilis Royle
ZHENG Peng,ZHANG Yue,KOU Can (Lijiang Teachers College,Lijiang,Yunnan 674100)
Abstract The strain PUR-01 was isolated for the first time from the Prinsepia utilis Royle plant,and it was isolated and purified,resistance evaluation,morphological analysis and molecular biological identification were carried out to explore the antibacterial activity of this strain against two tropical crop pathogenic fungi.The result showed that the endophytic fungi PUR-01 had certain inhibitory effects on Colletotrichum gloeosporioides and Fusarium oxysporum f.sp.Cubense,the inhibition rates were 34% and 24%,respectively.It provided the basis for research on biocontrol mechanism and application of endophytic fungi.By morphological and molecular biological identification,the strain was caused by Alternaria alternata.
Key words Prinsepia utilis Royle; Endophytic fungi;Isolation;Identification;Resistance evaluation;Colletotrichum gloeosporioides;Fusarium oxysporum f.sp.Cubense
青刺果(Prinsepia utilis Royle)为蔷薇科扁核木属(Prinsepia Royle)多年生落叶灌木[1]。青刺果果仁可以榨油,青刺果油中不饱和脂肪酸的含量较高[2],符合人体代谢的生理需求,是一种绿色健康的食用油;另外,青刺果油与皮肤之间有良好的亲和性,因此,青刺果油是一种重要的天然护肤油脂[3]。
植物内生真菌(endophytic fungi)是指一类在其部分或全部生活史中存活于健康植物组织内部,而不使宿主植物出现明显感染病害的真菌[4]。一些植物体内的内生真菌一方面可以提供植物所需要的营养物质,另一方面可以提高宿主植物的抗病性、应对逆境环境,并可以产生与宿主植物相同或相似的活性物質[5-7]。截至目前,国内外对青刺果内生真菌的相关研究尚属空白,该研究从青刺果茎段及叶片中分离出对2种热带作物重要植物病原真菌具有一定抑菌活性及耐盐特性的内生真菌PUR-01。……
