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Unveiling resilience: coelomic fluid bacteria’s impact on plant metabolism and abiotic stress tolerance

Authors :
Lamia Yakkou
Sofia Houida
Aicha El Baaboua
Serdar Bilen
Maryam Chelkha
Leyla Okyay Kaya
Abderrahim Aasfar
Fuad Ameen
Sartaj Ahmad Bhat
Mohammed Raouane
Souad Amghar
Abdellatif El Harti
Source :
Plant Signaling & Behavior, Vol 19, Iss 1 (2024)
Publication Year :
2024
Publisher :
Taylor & Francis Group, 2024.

Abstract

Earthworms’ coelomic fluid (CF) has been discovered to possess properties that promote plant development. In particular, the earthworm’s coelomic fluid-associated bacteria (CFB) are the primary factor influencing the plants’ response. To investigate this, we used bacteria isolated from the CF and selected based on different plant growth-promoting traits, in a mesocosm ecosystem that includes plants. This experiment aimed to assess their impact on the metabolism of plants growing under abiotic stress environments (alkaline soil and nitrogen (N), phosphate (P), and potassium (K) deficit) and compare the lipid profiles of plants under the various treatments. We used seven different bacterial species isolated from the CF of Aporrectodea molleri and as a plant model Zea mays L. For the metabolomic analysis method, we used gas chromatography-mass spectrometry lipidomic. After observing the metabolomic profiles, we found that a few molecular pathways are involved in how plants react to bacterial biostimulants. The bacterial isolates belonging to Pantoea vagans, Pseudomonas aeruginosa, Bacillus paramycoides, and Bacillus thuringiensis have led to a significant increase in synthesizing several metabolites belonging to various chemical categories. Contrary to predictions, abiotic stress did not cause a drop in the composition and concentration of lipids in plants treated with the CFB, demonstrating the rigidity of the protective mechanisms. The statistical analysis based on the Pearson method revealed a positive significant correlation between plant growth parameters (length of the aerial part, surface of the leaves, and biomass) and some metabolites belonging to fatty acids, carboxylic acids, benzene derivatives, and alkanes. Moreover, the standard metabolic components of all treatments in much higher concentrations during bacterial treatments than the control treatment suggests that the bacteria have stimulated the overexpression of these metabolic components. According to these results, we could assume that plants treated with CFB exhibit an adaptability of abiotic stress defense mechanisms, which may be attributed to the upregulation of genes involved in lipid biosynthesis pathways.

Details

Language :
English
ISSN :
15592316 and 15592324
Volume :
19
Issue :
1
Database :
Directory of Open Access Journals
Journal :
Plant Signaling & Behavior
Publication Type :
Academic Journal
Accession number :
edsdoj.60bd35e1325342d3890202f3709dc71b
Document Type :
article
Full Text :
https://doi.org/10.1080/15592324.2024.2363126