Journal
JOURNAL OF PLANT INTERACTIONS
Volume 16, Issue 1, Pages 443-451Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/17429145.2021.1974582
Keywords
Plant Growth Promoting Rhizobacteria; Arabidopsis thaliana; sugar transport; volatile compounds
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Funding
- French Ministry of Higher Education, Research and Innovation (Ministere de l'Enseignement superieur)
- European Regional Development Fund (FEDER)
- French National Centre for Scientific Research
- University of Poitiers
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Recent studies have shown the significance of plant-microorganism interactions in plant growth and development, particularly the role of sugar transporter genes. Experimental evidence suggests that rhizobacteria can impact plant growth and development by modulating the expression of sugar transporter genes.
In their natural environment, plants live in close interaction with complex populations of microorganisms, including rhizobacteria species commonly referred to as 'Plant Growth Promoting Rhizobacteria' (PGPR). A growing body of evidence demonstrates the importance of sugar transport in plant pathogen resistance and in plant-microorganism mutualistic symbioses. Using an in vitro experimental system, including the model plant species Arabidopsis thaliana, two PGPR strains (Pseudomonas simiae PICF7 and Burkholderia phytofirmans PsJN) and a non-PGPR strain (Escherichia coli), we conducted a comprehensive set of phenotypic and gene expression analyses to explore the role and regulation of sugar transporter genes in plant-PGPR interactions. In physical contact with the seedling roots, or solely via the emission of bacterial volatile compounds, the two PGPR strains tested improved the growth and development of the Arabidopsis seedlings and altered the expression of several plant sugar transporter genes. Our results also revealed both conserved and strain-specific transcriptional regulation mechanisms.
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