Radiation Resistant Microorganisms

A special issue of Microorganisms (ISSN 2076-2607). This special issue belongs to the section "Environmental Microbiology".

Deadline for manuscript submissions: closed (30 April 2021) | Viewed by 3673

Special Issue Information

Ionizing radiation affects cellular biomolecules including nucleic acids, proteins, and lipids directly or indirectly, eventually leading to lesions that can express themselves in a variety of biologically significant changes. Interestingly, microorganisms exhibiting high radiation resistance have been isolated from a wide range of environmental conditions, even though a naturally radiation intensive environment has not been found. Since Deinococcus radiodurans, one of the most radiation-resistant bacteria, was first isolated in 1956 from X ray-irradiated canned meat, the radiation-resistant microorganisms have been discovered in the three domains of life (Bacteria, Archaea, and Eukarya). These organisms are not only extremely tolerant to ionizing radiation, but also other DNA damaging agents and oxidative stress-generating conditions, such as desiccation. Therefore, characterization of the molecular mechanisms and key players underlying the multiple stress resistance helps us to understand their mysterious survival strategy and sheds lights on the biotechnological application of these strategies and their useful molecules, such as enzymes, polysaccharides, metabolites, etc. This Special Issue of Microorganisms calls for reviews as well as original research articles concerning any aspect related to radiation-resistant microorganisms, from the physiology and molecular biology to the applied aspects of radiation-resistant microorganisms.

Dr. Sangyong Lim
Dr. Hari S Misra
Guest Editors

Manuscript Submission Information

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Keywords

  • radiation resistant microorganisms
  • comparative genomics
  • DNA repair
  • oxidative stress
  • Ionizing radiation
  • biomolecules
  • biotechnology
  • astrobiology

Published Papers (1 paper)

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Research

18 pages, 2883 KiB  
Article
Effect of Ionizing Radiation on the Bacterial and Fungal Endophytes of the Halophytic Plant Kalidium schrenkianum
by Jing Zhu, Xiang Sun, Zhi-Dong Zhang, Qi-Yong Tang, Mei-Ying Gu, Li-Juan Zhang, Min Hou, Amir Sharon and Hong-Li Yuan
Microorganisms 2021, 9(5), 1050; https://0-doi-org.brum.beds.ac.uk/10.3390/microorganisms9051050 - 13 May 2021
Cited by 8 | Viewed by 2762
Abstract
Endophytic bacteria and fungi colonize plants that grow in various types of terrestrial and aquatic ecosystems. Our study investigates the communities of endophytic bacteria and fungi of halophyte Kalidium schrenkianum growing in stressed habitats with ionizing radiation. The geochemical factors and radiation (at [...] Read more.
Endophytic bacteria and fungi colonize plants that grow in various types of terrestrial and aquatic ecosystems. Our study investigates the communities of endophytic bacteria and fungi of halophyte Kalidium schrenkianum growing in stressed habitats with ionizing radiation. The geochemical factors and radiation (at low, medium, high level and control) both affected the structure of endophytic communities. The bacterial class Actinobacteria and the fungal class Dothideomycetes predominated the endophytic communities of K. schrenkianum. Aerial tissues of K. schrenkianum had higher fungal diversity, while roots had higher bacterial diversity. Radiation had no significant effect on the abundance of bacterial classes. Soil pH, total nitrogen, and organic matter showed significant effects on the diversity of root endophytes. Radiation affected bacterial and fungal community structure in roots but not in aerial tissues, and had a strong effect on fungal co-occurrence networks. Overall, the genetic diversity of both endophytic bacteria and fungi was higher in radioactive environments, however negative correlations were found between endophytic bacteria and fungi in the plant. The genetic diversity of both endophytic bacteria and fungi was higher in radioactive environments. Our findings suggest that radiation affects root endophytes, and that the endophytes associated with aerial tissues and roots of K. schrenkianum follow different mechanisms for community assembly and different paradigms in stress response. Full article
(This article belongs to the Special Issue Radiation Resistant Microorganisms)
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