高级检索+

柑橘果实中的微生物多样性与黄龙病症状的相互关系研究

Relationship between Endophytic Microbial Diversity and Symptoms of Huanglongbing in the Fruits of Citrus reticulate

  • 摘要: 植物—微生物协同关系在协助植物抵抗病原微生物侵染中具有重要的作用。感染黄龙病植株的不同部位症状差异显著,为探明柑橘(Citrus reticulare)内源微生物多样性与黄龙病菌(Candidatus Liberibacter spp.)的含量以及症状的相互关系,本研究通过对呈现黄龙病症状和无症状的柑橘果实分别进行细菌和真菌群落的扩增子高通量测序,分析柑橘果实样品中的微生物多样性与黄龙病菌含量及症状的相互关系。结果表明,柑橘黄龙病菌的含量与果实的黄龙病症状呈正相关,同时与细菌的alpha多样性也呈正相关。Beta多样性分析显示,黄龙病显症组的细菌和真菌的菌群构成与无症状组有显著的差异。通过共发生相关性分析,细菌Enterococcus,真菌Fusarium和Sporobolomyces与黄龙病菌在丰度上存在正相关,细菌Shigella和Agrobacterium与黄龙病菌在丰度上存在负相关。本研究报道的柑橘果实的微生物多样性与黄龙病菌含量及显症情况的相互关系,为生物防治柑橘黄龙病提供了新的参考。

     

    Abstract: The associations between plants and microbes play a critical role in plants’ resistance to pathogens. The research of correlation between microbial communities of citrus and Candidatus Liberibacter spp. might lay a foundation of biocontrol of Huanglongbing. The objective of this work was to analyze the correlation of fruit microbial communities and Candidatus Liberibacter. The bacteria and fungi of Huanglongbing symptomatic and asymptomatic citrus fruits were characterized with Illumina amplicon sequencing. The relative abundance of Candidatus Liberibacter in the fruits positively was correlated with HLB symptom and alpha diversity. The community structure of bacteria and fungi in symptomatic was significantly differ from asymptomatic analyzed by beta-diversity. Network analysis of microbial community shown that Enterococcus, Fusarium and Sporobolomyces co-occurred with Candidatus Liberibacter. Shigella and Agrobacterium displayed a negative interaction with the pathogen. This work firstly reported huanglongbing alter the microbial community of citrus fruits, and confirmed several microbes significantly interacted with huanglongbing pathogen Candidatus Liberibacter.

     

/

返回文章
返回