Biotechnological adaptation of high-yielding, gibberellin-overproducing Populus trees to seasonal growth patterns.

Modulating gibberellin production in Populus trees enhances both high yield and seasonal growth adaptation, with significant implications for forestry and ecology.

• Why it matters: Understanding how to balance growth promotion with seasonal dormancy is crucial for sustainable forestry, especially in temperate and boreal regions where climate variability impacts yield and tree survival.
• What they did: Researchers used the endogenous pPttCYCD3 promoter, regulated by the circadian clock component PttLHY2, to control bioactive gibberellin levels in transgenic hybrid Populus trees, demonstrating the importance of seasonal growth regulation.
• The result: The engineered trees achieved increased yield while maintaining seasonal growth patterns, enabling the development of climate-adapted, high-yielding trees through precision breeding.