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: 20 February 2025 | Viewed by 2058
Special Issue Editors
Interests: rhizospheric and endophytic microbiomes; microbial evolution; bacterial genetics and ecology
Special Issues, Collections and Topics in MDPI journals
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
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Planned Papers
The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.
Title: Role of Bacteria-derived Flavins in Plant Growth Promotion and Phytochemical Accumulation in Leafy Vegetables
Authors: Nivethika Ajeethan, Svetlana Yurgel and Lord Abbey
Abstract: Sinorhizobium meliloti 1021 bacteria secretes considerable amount of flavins (FLs) and can form 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 limited ability to secrete FLs (FL-). The results from this study indicated that inoculation with 1021 significantly increased the lengths and surface areas of the roots and hypocotyls of the seedlings compared to the 1021ΔribBA. The kale and lettuce seedlings recorded 19% and 14% increase in total root length, respectively, following inoculation with 1021 compared to 1021ΔribBA. A greenhouse trial showed that plant growth, photosynthetic rate and yield were improved with 1021 inoculation. Moreover, chlorophylls a and b, and total carotenoids were increased in the plants associated with 1021. In kale, total phenolics and flavonoids were significantly increased by 6% and 23% respectively, and in lettuce the increments were 102% and 57% respectively, with 1021 inoculation. Overall, the bacteria derived FLs enhanced kale and lettuce plant growth, physiology, and yield. Future investigation will use proteomic approaches combined with plant physiological responses to better understand host-plant response to bacteria-derived FLs.
Keywords: Bacteria-derived flavins; plant growth promoter; riboflavin; Sinorhizobium meliloti; lettuce; kale
