生态环境学报 ›› 2021, Vol. 30 ›› Issue (9): 1831-1841.DOI: 10.16258/j.cnki.1674-5906.2021.09.007

所属专题: 生物多样性专题汇编

• 研究论文 • 上一篇    下一篇

宁杞1号枸杞健康株与根腐病患病株的土壤微生物群落和功能差异

贾晨波(), 郭洋, 马成莲, 苏建宇, 徐春燕()   

  1. 宁夏大学生命科学学院/西部特色生物资源保护与利用教育部重点实验室,宁夏 银川 750021
  • 收稿日期:2020-02-09 出版日期:2021-09-18 发布日期:2021-12-08
  • 通讯作者: *E-mail: xcy@nxu.edu.cn
  • 作者简介:贾晨波(1994年生),男,博士研究生,主要研究方向为微生物资源开发与利用。E-mail: jcb101003@163.com
  • 基金资助:
    宁夏自然科学基金项目(2020AAC02010)

Difference on Soil Microbial Community and Function of Healthy and Diseased Plants of Lycium barbarum Ningqi-1

JIA Chenbo(), GUO Yang, MA Chenglian, SU Jianyu, XU Chunyan()   

  1. School of Life Sciences, Ningxia University/Key Laboratory of Ministry of Education for Protection and Utilization of Special Biological Resources, Yinchuan 750021, China
  • Received:2020-02-09 Online:2021-09-18 Published:2021-12-08

摘要:

根腐病严重制约着枸杞产业的发展,而土壤微生物多样性和物种组成的变化与植株根腐病的发生有密切的关系,因此了解宁夏枸杞根腐病发生与根表、根际和根围土壤微生物群落结构的关系十分必要。应用Illumina MiSeq高通量测序技术对枸杞健康株和根腐病患病株的根表、根际及根围土壤中16S rDNA V3+V4区和ITS1片段进行测序,将结果质控后比对相关数据库进行注释和分析。真菌群落中丰度最高的门和属分别是子囊菌门(Ascomycota)和镰刀菌属(Fusarium),细菌群落中优势门依次为放线菌门(Actinobacteria)、变形菌门(Proteobacteria)和绿弯菌门(Chloroflexi),节杆菌属(Arthrobacter)是丰度最高且在根表的丰度显著高于根际和根围土壤,根表、根际和根围3个部位的优势物种组成和占比均不相同。健康株根表的真菌群落丰富度、多样性及均匀度指数均高于患病株(P<0.05),而二者的细菌群落α多样性指数无显著差异。功能预测也同样表明健康株和患病株之间的土壤细菌群落功能差异较小,真菌群落中镰刀菌属的功能丰度较高,其在患病株根表和根际的丰度均大于健康株。综上,枸杞健康株和患病株之间,各样品中真菌群落多样性的差异比细菌群落大,二者根表真菌的差异最显著,患病株根表和根际的镰刀菌属的占比和功能丰度最大。该研究分别从土壤真菌和细菌两个角度阐述了宁杞1号枸杞健康株和根腐病患病株的土壤微生物群落和功能的差异,对宁夏枸杞根腐病的认识具有重要意义。

关键词: 枸杞, 根腐病, 高通量测序, 微生物多样性, 群落结构, 功能预测

Abstract:

Root rot seriously restricts the development of Lycium barbarum industry. The changes of soil microbial diversity and species composition are closely related to the occurrence of plant root rot. It is essential to know the relationship between the occurrence of root rot of Lycium barbarum with the microbial composition in rhizoplane, rhizosphere and root zone soil. The 16S rDNA “V3+V4” region and ITS1 fragment of the total soil DNA from the rhizoplane, rhizosphere and root zone of the diseased and healthy plants were sequenced using Illumina MiSeq high-throughput sequencing technology. Then the sequencing results were quality controlled and aligned with the relevant databases for annotation and analysis. The dominant phylum and genus in the fungal community were Ascomycota and Fusarium, respectively. The dominant phyla in the bacterial community were Actinobacteria, Proteobacteria and Chloroflexi. Arthrobacter was the dominant genus, and its abundance in rhizoplane was significantly higher than that in the rhizosphere and root zone soil. The composition or proportion of dominant species in rhizoplane, rhizosphere and root zone were quite different. The fungal communities richness, diversity and evenness in the rhizoplane of healthy plants were higher than that in the diseased plants (P<0.05), and there was no significant difference in α diversity index between the healthy and diseased plants. Functional prediction showed that there was little difference between the healthy and diseased plants in the bacterial community. The functional abundance of Fusarium was higher in the rhizoplane and rhizosphere of the diseased plants than that in the healthy plants. In all, there was great difference of fungal community diversity between the healthy and diseased plants, which has the most significant effect on rhizoplane fungi. Fusarium, the most dominant taxon in the rhizoplane and rhizosphere soils of the diseased plants, had the highest functional abundance. This study mainly discussed the differences of soil microbial community and function between the healthy and the diseased Lycium barbarum of Ningqi-1, which was of great significance to understand the root rot of Lycium barbarum in Ningxia.

Key words: Lycium barbarum, root rot, high-throughput sequencing, microbial diversity, community structure, function prediction

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