Journal Article 2 balsam poplar (Populus balsamifera) C-repeat binding factor (CBF) gene family 1 Comment 1 Nucleotides 1 RNA, Messenger 1 Research Support, Non-U.S. Gov't 1 mehr ... Research Support, U.S. Gov't, Non-P.H.S. 1 bud break 1 chilling requirement 1 climate change 1 climate warming 1 dormancy 1 freeze avoidance 1 gene expression 1 growing season frost 1 heat sum 1 phenological flexibility 1 phenology 1 weniger ...