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Circadian clock gene LATE ELONGATED HYPOCOTYL directly regulates the timing of floral scent emission in Petunia
The body clock gene LATE ELONGATED HYPOCOTYL controls when petunias release their flower scent
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Abstract
The circadian clock gene P. hybrida LATE ELONGATED HYPOCOTYL (LHY) regulates floral volatile production in Petunia hybrida.
- PhLHY expression peaks in the morning, while the master scent regulator PhGI and other evening-expressed genes peak later.
- Overexpression of PhLHY in Arabidopsis leads to an arrhythmic clock phenotype.
- Constitutive expression of PhLHY in Petunia results in decreased expression of key evening genes and reduced volatile emissions.
- Reduced PhLHY expression in Petunia advances the peak timing of several important evening-expressed genes to the morning.
- PhLHY protein interacts with evening elements in the promoters of ODO1 and other FVBP pathway genes, suggesting a direct regulatory role.
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