Mariën Bertold, Robinson Kathryn M, Jurca Manuela, Michelson Ingrid H, Takata Naoki, Kozarewa Iwanka, Pin Pierre A, Ingvarsson Pär K, Moritz Thomas, Ibáñez Cristian, Nilsson Ove, Jansson Stefan, Penfield Steve, Yu Jun, Eriksson Maria E
IceLab (Integrated Science Lab), Umeå University, Umeå, Sweden.
Department of Mathematics and Mathematical Statistics, Umeå University, Umeå, Sweden.
NPJ Biol Timing Sleep. 2025;2(1):16. doi: 10.1038/s44323-025-00034-4. Epub 2025 Apr 7.
Understanding the timely regulation of plant growth and phenology is crucial for assessing a terrestrial ecosystem's productivity and carbon budget. The circadian clock, a system of genetic oscillators, acts as 'Master of Ceremony' during plant physiological processes. The mechanism is particularly elusive in trees despite its relevance. The primary and secondary tree growth, leaf senescence, bud set, and bud burst timing were investigated in 68 constructs transformed into hybrids and compared with untransformed or transformed controls grown in natural or controlled conditions. The results were analyzed using generalized additive models with ordered-factor-smooth interaction smoothers. This meta-analysis shows that several genetic components are associated with the clock. Especially core clock-regulated genes affected tree growth and phenology in both controlled and field conditions. Our results highlight the importance of field trials and the potential of using the clock to generate trees with improved characteristics for sustainable silviculture (e.g., reprogrammed to new photoperiodic regimes and increased growth).
了解植物生长和物候的适时调控对于评估陆地生态系统的生产力和碳预算至关重要。生物钟作为一种基因振荡器系统，在植物生理过程中起着“司仪”的作用。尽管其具有相关性，但该机制在树木中尤其难以捉摸。对转化为杂种的68个构建体的树木初级和次级生长、叶片衰老、芽形成和芽萌发时间进行了研究，并与在自然或受控条件下生长的未转化或转化对照进行了比较。使用具有有序因子平滑交互平滑器的广义加性模型对结果进行了分析。这项荟萃分析表明，几个遗传成分与生物钟相关。特别是核心生物钟调控基因在受控和田间条件下均影响树木生长和物候。我们的结果强调了田间试验的重要性，以及利用生物钟培育具有改良特性的树木以实现可持续造林的潜力（例如，重新编程以适应新的光周期模式并促进生长）。
