Observational analysis reveals phytochrome B signaling impacts dormancy in poplar trees, suggesting adaptations to temperature.
In poplar trees, a molecular switch involving phytochrome B and PHYTOCHROME-INTERACTING FACTOR 4 responds to cool temperatures by keeping growth active, preventing premature dormancy. This mechanism, which differs from that in Arabidopsis, helps trees adapt to cool summers and ensures survival in seasonal environments.
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Jing et al. (2025) studied this question.
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