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Microbial-derived metabolites coordinate growth regulation and stress tolerance in Phalaenopsis orchids
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DOI：10.1016/j.jplph.2026.154798.png)
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Abstract
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• Culture filtrate of Bacillus licheniformis BlCP6 promotes orchid growth and stress tolerance. • Genome analysis and metabolite profiling suggest a potential role for siderophores in growth promotion, while osmoprotectants and extracellular lytic enzymes may contribute to stress tolerance. • Microbial metabolite treatment was associated with enhanced phenylpropanoid metabolism and increased antioxidant enzyme activities. • Treated orchids exhibited improved physiological performance under drought and chilling stress, as well as enhanced tolerance to Fusarium yellow-leaf disease. • Accumulation of proteins linked to leaf growth, stress response, and defense was increased following microbial metabolite treatment in Phalaenopsis orchids.
Keywords:
Bacillus licheniformis
orchid growth
stress tolerance
microbial metabolites
phenylpropanoid metabolism
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