植物染色体B和植物染色体相互作用因子4调节树木在寒冷环境中的季节性生长
Bo Zhang1, Keh Chien Lee2, Laura García Romañach2
1Umeå Plant Science Centre, Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, Umeå, Sweden. bo.zhang@slu.se.
Nature communications
|August 30, 2025
概括
树使用PYTOCHROME B (PHYB) -PYTOCHROME INTERACTING FACTOR4 (PIF4) 模块来平衡光周期和温度线索. 这种机制可以防止树在寒冷环境中过早停止生长,确保树木适应.
科学领域:
- 植物生物学
- 分子遗传学
- 生态学
背景情况:
- 在高度/高海拔地区的树木需要适应寒冷才能生存.
- 树木适应冬季的关键是停止生长和芽的时间.
- 光周期和温度影响生长停止,但机制尚不清楚.
研究的目的:
- 研究控制光周期和温度之间调节树木生长停止的分子机制.
- 阐明植物染色体B (PHYB) 和植物染色体相互作用因子4 (PIF4) 在树 (Populus) 适应寒冷的作用.
主要方法:
- 在树中研究PHYB-PIF4模块.
- 分析了光周期,温度和基因表达之间的相互作用.
- 检查了PIF4与FLOWERING LOCUS T2 (FT2) 的促进物结合.
主要成果:
- 在较低的温度下,PHYB-PIF4模块可以防止过早停止生长.
- 在低温和长日的环境下,PHYB保持了树的生长.
- 在低温下,PIF4促进生长停止,抑制FT2转录.
- 在转录和蛋白质水平上抑制PIF4,防止过早停止生长.
结论:
- 树平衡PHYB和PIF4以优化生长停止和芽的时间在寒冷的环境中.
- 该机制涉及PIF4抑制FT2转录,与一年生植物形成鲜明对比.
- 这项研究揭示了树适应寒冷气候的新策略.
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