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Multi-Omics Integration Reveals Temporal Partitioning Between Metabolic Priming and Proliferative Expansion in
Zhaoqing Tong1, Ze Tao1, Fangdong Li2
1Key Laboratory of Fruit Quality Development and Regulation of Liaoning Province, College of Horticulture, Shenyang Agricultural University, Shenyang 110866, China.
International Journal of Molecular Sciences
|March 14, 2026
Summary
Plant growth-promoting rhizobacteria (PGPR) enhance cherry growth by modulating plant hormones and root development. Strain Y37 uniquely promotes biomass through metabolic priming and structural reinforcement.
Area of Science:
- Plant Science
- Microbiology
- Genomics
Background:
- Plant growth-promoting rhizobacteria (PGPR) influence plant growth-defense trade-offs.
- Molecular mechanisms of PGPR in woody fruit crops like cherry (Prunus avium) are not well understood.
Purpose of the Study:
- Investigate temporal molecular mechanisms of PGPR in sweet cherry.
- Evaluate the impact of three PGPR strains on plant growth, physiology, and molecular pathways.
Main Methods:
- Inoculation of cherry seedlings with Rahnella Y17, Arthrobacter Y37, and Bacillus megaterium P6.
- Assessment of phenotypic and physiological traits at 60 days.
- Phytohormone metabolomics and root transcriptome profiling at 30 and 40 days.
Main Results:
- All PGPR strains improved growth, photosynthesis, and root architecture; Y37 showed superior biomass.
- Phytohormone analysis revealed ABA suppression, early GA and auxin increase, and later cytokinin accumulation.
- Transcriptomics identified strain-specific responses and key genes in hormone regulation and cell wall synthesis.
Conclusions:
- PGPR, particularly Y37, reallocate carbon and tune hormone pathways for enhanced cherry growth and resilience.
- Strain Y37 promotes growth via temporal partitioning from metabolic priming to architectural reinforcement.
- Findings offer insights for sustainable cherry production using PGPR.
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