Plant Transcriptome Reprograming and Bacterial Extracellular Metabolites Underlying Tomato Drought Resistance Triggered by a Beneficial Soil Bacteria
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León Morcillo, Rafael JorgeEditorial
MDPI
Materia
PGPR Tomatoes Drought stress Bacillus megaterium TG1-E1 Transcriptome Extracellular metabolites Osmoprotectant
Date
2021Referencia bibliográfica
Morcillo, R.J.L.; Vílchez, J.I.; Zhang, S.; Kaushal, R.; He, D.; Zi, H.; Liu, R.; Niehaus, K.; Handa, A.K.; Zhang, H. Plant Transcriptome Reprograming and Bacterial Extracellular Metabolites Underlying Tomato Drought Resistance Triggered by a Beneficial Soil Bacteria. Metabolites 2021, 11, 369. https:// doi.org/10.3390/metabo11060369
Sponsorship
Chinese Academy of SciencesAbstract
Water deficit is one of the major constraints to crop production and food security worldwide. Some plant growth-promoting rhizobacteria (PGPR) strains are capable of increasing plant
drought resistance. Knowledge about the mechanisms underlying bacteria-induced plant drought
resistance is important for PGPR applications in agriculture. In this study, we show the drought
stress-mitigating effects on tomato plants by the Bacillus megaterium strain TG1-E1, followed by the
profiling of plant transcriptomic responses to TG1-E1 and the profiling of bacterial extracellular
metabolites. Comparison between the transcriptomes of drought-stressed plants with and without
TG1-E1 inoculation revealed bacteria-induced transcriptome reprograming, with highlights on differentially expressed genes belonging to the functional categories including transcription factors, signal
transduction, and cell wall biogenesis and organization. Mass spectrometry-based analysis identified
over 40 bacterial extracellular metabolites, including several important regulators or osmoprotectant
precursors for increasing plant drought resistance. These results demonstrate the importance of plant
transcriptional regulation and bacterial metabolites in PGPR-induced plant drought resistance.