PDF(Pubmed)
Abstract：
Dormancy release and reactivation in temperate trees are mainly controlled by temperature and are affected by age, but the underlying molecular mechanisms are still unclear. In this study, we explored the effects of low temperatures in winter and warm temperatures in spring on dormancy release and reactivation in Larix kaempferi. Further, we established the relationships between cell-cycle genes and cambium cell division. The results showed that chilling accelerated L. kaempferi bud break overall, and the longer the duration of chilling is, the shorter the bud break time is. After dormancy release, warm temperatures induced cell-cycle gene expression; when the configuration value of the cell-cycle genes reached 4.97, the cambium cells divided and L. kaempferi reactivated. This study helps to predict the impact of climate change on wood production and provides technical support for seedling cultivation in greenhouses.
摘要：
温带树木的休眠释放和重新激活主要受温度的控制，并受年龄的影响，但潜在的分子机制仍不清楚。在这项研究中,我们探讨了冬季低温和春季温暖温度对落叶松休眠释放和再激活的影响。Further,我们建立了细胞周期基因与形成层细胞分裂之间的关系。结果表明，低温加速了山雀芽的总体破芽，冷藏的持续时间越长，破芽时间越短。休眠释放后，温暖的温度诱导细胞周期基因的表达；当细胞周期基因的构型值达到4.97时，形成层细胞分裂，L.kaempferi重新激活。该研究有助于预测气候变化对木材生产的影响，为温室育苗提供技术支持。
