ORIGINAL RESEARCH article
Front. Plant Sci.
Sec. Plant Symbiotic Interactions
Volume 16 - 2025 | doi: 10.3389/fpls.2025.1561298
This article is part of the Research TopicEnhancing Plant Stress Resilience: Innovative Roles of Plant Growth-Promoting Bacteria (PGPB) in Sustainable Agriculture and Crop ProtectionView all 5 articles
ABP-B9, a new strain of Pseudomonas seleniipraecipitans with biostimulant activity
Provisionally accepted
Agustina Bernal-Vicente1*
Pedro Joaquín Sánchez-Pujante1
Pedro Diaz-Vivancos2
Livia Donaire2
Miguel A. Aranda2
Yolanda Hernando1- 1Abiopep S.L., Murcia, Spain
- 2Center for Edaphology and Applied Biology of Segura, Spanish National Research Council (CSIC), Espinardo, Murcia, Spain
Select one of your emails
You have multiple emails registered with Frontiers:
Notify me on publication
Please enter your email address:
If you already have an account, please login
You don't have a Frontiers account ? You can register here
The present study reports the characterization of ABP-B9 (CECT 30310), a bacterium isolated from the rhizosphere of a commercial lettuce crop in Aguilas, Spain. The application of ABP-B9 increased crop yield in lettuce, spinach and celery under commercial agronomic practices. Analyses conducted under controlled conditions showed that ABP-B9 enhanced root system development, improved photosynthetic efficiency, increased flavonoid content, and optimized the nitrogen status of the plants. ABP-B9 demonstrated the ability to produce indol-3 acetic acid (IAA) and hydroxamate-type siderophores in vitro when in contact with lettuce seedlings, which helps to explain the increased root system development. Thus, ABP-B9 can be considered a plant biostimulant microorganism, with its effects evident in seedlings as early as 5 days after application. We determined the full genome sequence of ABP-B9. Genome and phylogenetic analyses confirmed that ABP-B9 is a novel strain from the Pseudomonas genus, closely related to other P. seleniipraecipitans isolates. The ABP-B9 genome consists of 4,602,210 bp with a GC content of 61.46%, and includes 4,247 predicted proteincoding genes, 12 rRNAs, and 66 tRNAs. Our genomic analyses strongly suggest that ABP-B9 is nonpathogenic to humans; indeed, it was not pathogenic in a murine model following oral inoculation at 1.95 mL/Kg. In summary, the ABP-B9's abilities to enhance crop growth and improve yield, combined with its safety profile, make it a valuable addition to the toolbox for sustainable agricultural practices.
Keywords: biostimulation, celery, leafy vegetables, Lettuce, PGPR, spinach
Received: 15 Jan 2025; Accepted: 06 May 2025.
Copyright: © 2025 Bernal-Vicente, Sánchez-Pujante, Diaz-Vivancos, Donaire, Aranda and Hernando. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Agustina Bernal-Vicente, Abiopep S.L., Murcia, Spain
Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.