畜牧兽医学报 ›› 2014, Vol. 45 ›› Issue (12): 2057-2066.doi: 10.11843/j.issn.0366-6964.2014.12.021

• 临床兽医 • 上一篇    下一篇

变异黄芪内生真菌种群分布特征

曹丹丹1,路浩1,赵宝玉1*,薛瑞旭1,权海云1,杨晓雯1,刘晓学1,严杜建1,2   

  1. (1.西北农林科技大学动物医学院,杨凌 712100;2.阿克苏职业技术学院,阿克苏 843000)
  • 收稿日期:2014-03-27 出版日期:2014-12-23 发布日期:2014-12-23
  • 通讯作者: 赵宝玉,E-mail:zhaobaoyu12005@163.com
  • 作者简介:曹丹丹(1988-),女,河北滦南人,硕士生,主要从事疯草内生真菌研究,E-mail:cdd1988228@163.com
  • 基金资助:

    国家自然科学基金(31201958);国家“十二五”公益性行业(农业)科研专项(201203062);中央高校基本科研业务费(QN2011108)

The Species Distribution Characteristics of Endophyte in Astragalus variabilis

CAO Dan-dan1,LU Hao1,ZHAO Bao-yu1*,XUE Rui-xu1,QUAN Hai-yun1,YANG Xiao-wen1,LIU Xiao-xue1,YAN Du-jian1,2   

  1. (1.College of Veterinary Medicine,Northwest A&F University,Yangling 712100,China;2.Aks Vocational and Technical College,Aksu 843000,China)
  • Received:2014-03-27 Online:2014-12-23 Published:2014-12-23

摘要:

为探明变异黄芪(Astragalus variabilis)中是否存在内生真菌及其种群分布情况,对采自内蒙古腾格里苏木的变异黄芪样品,采用表面消毒法进行内生真菌分离纯化,并用微生物形态学观察方法和rDNA-ITS序列分析技术对分离获得的内生真菌进行种属鉴定。结果显示,内蒙古腾格里苏木变异黄芪植株中存在多种内生真菌,在所有不同的消毒时间中,叶的分离率最高(110.00%),花最低(45.00%)。从变异黄芪3种组织中共分离到内生真菌321株,分属于5纲7目11科17属,其中的Undifilum oxytropis分布最广,占总菌株的47.98%,为变异黄芪的优势菌株,其次为炭角菌属(Xylaria sp.),其分离率为16.51%。结果表明,变异黄芪内生真菌数量、种属组成与分布存在明显组织差异,叶是内生真菌侵染和定植的主要部位,而茎内生真菌多样性最高。

Abstract:

Endophyte were isolated from Astragalus variabilis samples from Tengeli of Inner Mongolia to investigate whether endophyte exist in this plant and to assess the diversity and distribution of endophyte.Surface sterilization of plant materials was taken to isolate and purify the endophyte,and species and genus of endophyte were identified by the traditional morphology and rDNA-ITS sequence analysis.The result showed that there were many kinds of endophyte in the Astragalus variabilis samples collected in Tengeli of Inner Mongolia.Under all the conditions of sterilization,the isolation rates of leaf was highest (110.00%),and the flower was lowest (45.00%).321 strains of endophyte were isolated from 3 different tissues of Astragalus variabilis,which belonged to 17 genera,11 families,7 orders,and 5 classes.Undifilum oxytropis was the dominant species in this plant with the relative frequency 47.98%,followed with Xylaria sp.(16.51%).There was an obviously difference in quantity,species and distribution of the endophyte between different parts of Astragalus variabilis.Leaf was the most vulnerable to infection and colonization by the endophyte,and the diversity was the maximum in stem of Astragalus variabilis.

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