Abstract
The transition from the vegetative juvenile phase to the adult phase is a crucial event in the life cycle of flowering plants, with flowering being the most important milestone. While the regulatory pathways of flowering have been well established in model plants such as <italic>Arabidopsis</italic> and a few crops, the flowering regulation pathways in perennial forest trees remain poorly understood. This paper summarizes the regulation of flowering time by miR156 and miR172, which are the main members of the aging pathway, and also presents new information on the role of miR159 and miR169. These two microRNAs interact with miR156 and miR172 to jointly regulate flowering time in forest trees. Overall, this review sheds light on the complex regulatory mechanisms underlying flowering time in forest trees and provides insights into potential targets for manipulating the flowering time of these economically and ecologically important species.
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