基本的氨酸拉链转录因子通过控制C/N分离到顶部和侧面器官来塑造植物架构
Philipp Kreisz1, Alicia M Hellens2,3, Christian Fröschel1
1Department of Pharmaceutical Biology, Faculty of Biology, Biocenter, Julius-von-Sachs-Institute, Julius-Maximilians-Universität Würzburg, Würzburg 97082, Germany.
概括
对糖敏感的S1-基本-素-拉链 (S1-bZIP) 转录因子通过控制碳水化合物和分配来调节植物结构. 这些因素将资源从顶端器官转移到侧面器官,促进侧面生长并影响植物营养状况.
科学领域:
- 植物生物学 植物生物学
- 分子遗传学 分子遗传学
- 植物生理学 植物生理学
背景情况:
- 顶端主导,主要茎对侧面器官生长的控制,受植物营养状况的影响.
- 虽然荷尔蒙调节已被理解,但糖信号在侧面器官形成中的作用是最近的发现.
- 了解转录调节器是控制顶部和侧面生长之间的平衡的关键.
研究的目的:
- 为了确定控制顶端和侧面器官生长之间的权衡的转录调节者.
- 调查植物结构中对糖反应S1-基本-氨酸-拉链 (S1-bZIP) 转录因子的功能.
主要方法:
- 利用S1-bZIP转录因子的诱导性功能增益和功能丧失方法.
- 对S1-bZIP突变进行了全面的表型和分析研究.
- 执行特定组织的转录组学以识别下游目标.
主要成果:
- S1-bZIP转录因子在建立顶端主导地位方面表现出很大程度上冗余的功能.
- 突变S1-bZIP突变显示了糖和有机分配从顶部到侧面器官的显著转变,导致侧面增长.
- 确定了III类SWEET糖载体和GLUTAMINE AMIDO-TRANSFERASE 1_2.1作为直接的S1-bZIP目标,将代谢和建筑表型联系起来.
结论:
- S1-bZIPs调节碳水化合物从源叶分离到顶部器官,并调节供应.
- 这些因素通过影响碳/ (C/N) 耗尽来限制侧面器官的形成.
- 了解植物C/N分区机制对于开发培育策略以实现所需的植物结构和营养至关重要.
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