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Rhizobium-Plant Interaction

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Molecular Microbiology".

Deadline for manuscript submissions: closed (31 January 2024) | Viewed by 1516

Special Issue Editors


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Guest Editor
Department of Biology, University of Florence, Via Madonna del Piano 6, 50019 Sesto Fiorentino, Italy
Interests: rhizospheric and endophytic microbiomes; microbial evolution; bacterial genetics and ecology
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
Department of Biology, University of Florence, Via Madonna del Piano 6, 50019 Sesto Fiorentino, Italy
Interests: plant–rhizobium symbiosis; systems biology; multipartite genomes; metagenomics; bacterial epigenomics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Nitrogen-fixing rhizobial-plant interaction is one of the most studied examples of symbiosis and a model for studying the molecular aspects of host-microbe interaction. A complex signaling dialogue occurs between plants and soil rhizobia, allowing the proper partner recognition and the following plant tissue colonization by rhizobia. During this process, bacterial physiology undergoes a drastic remodeling, as well as the plant cells, adapt to host the bacteria. Several novel molecular aspects of this process are being discovered in the last years, including physiological and ecological aspects of the molecular actors of this model symbiosis and the recognition that rhizobia can non-symbiotically interact with several plant species other than legumes.

This Special Issue addresses the contribution of studies on the interaction between rhizobia and plants. The topics include, but are not limited to, (1) increased understanding of molecular signals between rhizobia and plants, (2) role of partners’ genotype specificities in the phenotypic variation of rhizobium-plant symbiotic asosciation; (3) molecular diversity and evolutionary dynamics of rhizobia-plant interaction, and (4) molecular understanding and relevance of non-symbiotic rhizobia.

Dr. Alessio Mengoni
Dr. Camilla Fagorzi
Guest Editors

Manuscript Submission Information

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Keywords

  • nitrogen-fixation
  • bioinoculation
  • plant microbiome
  • rhizobia
  • plant symbionts
  • sustainable agriculture
  • rhizosphere ecology
 

Published Papers (1 paper)

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Research

14 pages, 2390 KiB  
Article
Role of Bacteria-Derived Flavins in Plant Growth Promotion and Phytochemical Accumulation in Leafy Vegetables
by Nivethika Ajeethan, Svetlana N. Yurgel and Lord Abbey
Int. J. Mol. Sci. 2023, 24(17), 13311; https://0-doi-org.brum.beds.ac.uk/10.3390/ijms241713311 - 28 Aug 2023
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Abstract
Sinorhizobium meliloti 1021 bacteria secretes a considerable amount of flavins (FLs) and can form a nitrogen-fixing symbiosis with legumes. This strain is also associated with non-legume plants. However, its role in plant growth promotion (PGP) of non-legumes is not well understood. The present [...] Read more.
Sinorhizobium meliloti 1021 bacteria secretes a considerable amount of flavins (FLs) and can form a nitrogen-fixing symbiosis with legumes. This strain is also associated with non-legume plants. However, its role in plant growth promotion (PGP) of non-legumes is not well understood. The present study evaluated the growth and development of lettuce (Lactuca sativa) and kale (Brassica oleracea var. acephala) plants inoculated with S. meliloti 1021 (FL+) and its mutant 1021ΔribBA, with a limited ability to secrete FLs (FL). The results from this study indicated that inoculation with 1021 significantly (p < 0.05) increased the lengths and surface areas of the roots and hypocotyls of the seedlings compared to 1021ΔribBA. The kale and lettuce seedlings recorded 19% and 14% increases in total root length, respectively, following inoculation with 1021 compared to 1021ΔribBA. A greenhouse study showed that plant growth, photosynthetic rate, and yield were improved by 1021 inoculation. Moreover, chlorophylls a and b, and total carotenoids were more significantly (p < 0.05) increased in kale plants associated with 1021 than non-inoculated plants. In kale, total phenolics and flavonoids were significantly (p < 0.05) increased by 6% and 23%, respectively, and in lettuce, the increments were 102% and 57%, respectively, following 1021 inoculation. Overall, bacterial-derived FLs enhanced kale and lettuce plant growth, physiological indices, and yield. Future investigation will use proteomic approaches combined with plant physiological responses to better understand host-plant responses to bacteria-derived FLs. Full article
(This article belongs to the Special Issue Rhizobium-Plant Interaction)
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