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中国农学通报 ›› 2016, Vol. 32 ›› Issue (7): 6-13.doi: 10.11924/j.issn.1000-6850.casb15090039

• 林学 园艺 园林 • 上一篇    下一篇

盐碱地引种沙枣根瘤内生菌及根际土壤AM 真菌的多样性

宋福强,牛丽纯,常伟,范晓旭,刘璇,高扬   

  1. 黑龙江大学生命科学学院,黑龙江大学生命科学学院,黑龙江大学生命科学学院,黑龙江大学生命科学学院,黑龙江大学生命科学学院,黑龙江大学生命科学学院
  • 收稿日期:2015-09-10 修回日期:2015-10-13 接受日期:2015-10-22 出版日期:2016-03-18 发布日期:2016-03-18
  • 通讯作者: 宋福强
  • 基金资助:
    国家自然科学基金项目“沙枣丛枝菌根(AM)耐盐胁迫响应机制的研究”(31570635);黑龙江省杰出青年科学基金“盐碱地造林树种-沙枣苗木定向培育技术研究”(JC201306);黑龙江省应用技术研究与开发计划项目“盐碱地造林树种-沙枣苗木菌根化培育技术研究”(GC13B502);国家林业公益性行业科研专项“松嫩平原盐碱地生物治理关键技术与示范”(201504409);哈尔滨市科技创新优秀学科带头人项目“盐碱地造林树种-沙枣菌根化育苗技术研究”(2013RFXXJ056)。

Diversity of Root Nodule Endophytes from Elaeagnus angustifolia L. and Arbuscular Mycorrhizal Fungi from Rhizosphere in Saline-alkali Soil

  • Received:2015-09-10 Revised:2015-10-13 Accepted:2015-10-22 Online:2016-03-18 Published:2016-03-18

摘要: 为了揭示黑龙江省盐碱地引种沙枣根瘤内生菌及根际土壤丛枝菌根(Arbuscular Mycorrhizal,AM)真菌的多样性,采用根瘤切片法和湿筛法并结合分子生物学手段对沙枣根瘤内生菌及根际土壤中的AM真菌进行分离、鉴定和多样性分析。研究结果表明:从沙枣根瘤内成功地分离和鉴定出了27 个纯菌株,其中放线菌4 株、细菌14 株、真菌9 株,内生细菌的多样性指数最为丰富,与根瘤形成有关的内生放线菌多样性指数最低,但放线菌类群中Frankia sp(. 代号H01)菌株优势度指数和均匀度指数最高;从沙枣根际土壤中共分离和鉴定出5 属8 株AM 真菌,Glomus 属有3 株,Funneliformis 属有2 株,Septoglomus 属有1 株,Rhizophagus 属有1 株,Acaulospora 属有1 株。Rhizophagus intraradices 在样品中的分离频度达到了100%,孢子密度高达48.5 个/50 g 土,是典型的优势菌株。在沙枣苗木菌根化及根瘤化培育过程中,Frankia sp.(H01)和Rhizophagus intraradices可作为重要的候选菌株。

关键词: 阿克达拉灌区, 阿克达拉灌区, 资源, 土壤养分, 宜农, 土壤调查

Abstract: This study was designed to evaluate the diversity of endophytes in Elaeagnus angustifolia L. root nodules and AM fungi (AMF) in the rhizosphere, located in saline-alkali soil of Heilongjiang Province. Nodule slicing and wet sieve methods combined with molecular biology technology were used to separate, identify and analyze the endophytes and AMF. In total, 27 endophytic strains were isolated and identified, including 4 actinomycetes, 14 bacteria and 9 fungi. The diversity index of endophytic bacteria was the highest while that of the endophytic actinomycetes related to root nodule formation was the lowest. The dominance index and evenness index of Frankia sp. (H01) were both higher than that of others. In addition, 8 strains AM fungi belonging to 5 different genus were obtained in the rhizosphere. Glomus ontained 3 strains, Funneliformis contained 2 strains, Septoglomus contained 1 strain, Rhizophagus contained 1 strain, and Acaulospora contained 1 strain, respectively. Rhizophagus intraradices was the dominant AMF spore with 100% isolation frequency in all soil samples and its spore density was 48.5/50 g. As a result, R. intraradices could be used as an important candidate strain in the process of mycorrhizal seedling and nodulating cultivation of Elaeagnus angustifolia L..