1887

Abstract

The endophytic bacterial community and their diversity are closely related to the host’s growth and development. This paper explores the culturable endophytic bacteria in the stems, leaves, roots and rhizomes of (AM) of four localities (Yuqian, Wenxian, Pan’an and Pingjiang) and the potential correlation between the bacteria and plant bioactive compounds. A total of 118 endophytic bacteria belonging to 3 phyla, 5 classes, 11 orders, 26 families and 48 genera were isolated and identified from the four AM tissues. Among them, was the dominant genus. In AM, the tissue type and locality influenced the endophytic bacterial community. Approximately 29.7 and 28.8% of the endophytic bacteria exhibited tissue specificity and geographic specificity, respectively. Furthermore, high-performance liquid chromatography revealed that the sesquiterpenoid (atractylenolide I, atractylenolide Ⅱ and atractylon) content was more in the rhizomes of Wenxian than in those of Pingjiang, Yuqian and Pan’an. The multiple linear regression was used to screen the bacterial strains related to the bioactive compounds of AM. The relative frequency of positively correlated with atractylenolide I and atractylon content in AM but negatively correlated with atractylenolide Ⅱ content. The study also provides a theoretical framework for future research on endophytic bacteria as alternative sources of secondary plant metabolites.

Funding
This study was supported by the:
  • Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences and Peking Union Medical College (Award 2021ZR09)
    • Principle Award Recipient: BoZhu
  • Natural Science Foundation of Zhejiang Province (Award LQ21H280003)
    • Principle Award Recipient: BoZhu
  • Innovative Research Group Project of the National Natural Science Foundation of China (Award 82003896)
    • Principle Award Recipient: BoZhu
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/content/journal/micro/10.1099/mic.0.001109
2021-11-26
2022-01-28
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