English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Perennial species in the boreal and temperate regions are subject to extreme annual variations in light and temperature. They precisely adapt to seasonal changes by synchronizing cycles of growth and dormancy with external cues. Annual dormancy–growth transitions and flowering involve factors that integrate environmental and endogenous signals. MADS-box transcription factors have been extensively described in the regulation of  Arabidopsis  flowering. However, their participation in annual dormancy–growth transitions in trees is minimal. In this study, we investigate the function of  MADS12 , a  Populus tremula  ×  alba SUPPRESSOR OF CONSTANS OVEREXPRESSION 1  ( SOC1 )-related gene. Our gene expression analysis reveals that  MADS12  displays lower mRNA levels during the winter than during early spring and mid-spring. Moreover,  MADS12  activation depends on the fulfillment of the chilling requirement. Hybrid poplars overexpressing  MADS12  show no differences in growth cessation and bud set, while ecodormant plants display an early bud break, indicating that  MADS12  overexpression promotes bud growth reactivation. Comparative expression analysis of available bud break-promoting genes reveals that  MADS12  overexpression downregulates the  GIBBERELLINS 2 OXIDASE 4  ( GA2ox4 ), a gene involved in gibberellin catabolism. Moreover, the mid-winter to mid-spring RNAseq profiling indicates that  MADS12  and  GA2ox4  show antagonistic expression during bud dormancy release. Our results support  MADS12  participation in the reactivation of shoot meristem growth during ecodormancy and link  MADS12  activation and  GA2ox4  downregulation within the temporal events that lead to poplar bud break.

Overexpression of a SOC1-Related Gene Promotes Bud Break in Ecodormant Poplars