时间转录基因组分析揭示了米开花过程中florigens的两相作用
Renwei Sun1, Yifeng Ding1, Manaki Mimura1
1Laboratory of Plant Breeding and Genetics, Department of Agricultural and Environmental Biology, The University of Tokyo, Yayoi, Bunkyo-Ku, Tokyo, 113-8657, Japan.
概括
花基因 (Hd3a和RFT1) 在米中控制花过渡. 它们在植物生长期间抑制关键的发育基因,并在短日条件下诱导开花,揭示了维持植物生长的新角色.
科学领域:
- 植物分子生物学 植物分子生物学
- 植物生理学 植物生理学
- 遗传学和基因组学 遗传学和基因组学
背景情况:
- 米的花转变是一个由环境因素调节的关键发育过程.
- 众所周知,花基因,特别是Hd3a和RFT1,对于启动大米开花至关重要.
研究的目的:
- 为了研究在花诱导过程中,在米芽上角 (SAM) 中早期的转录动态.
- 为了在短日 (SD) 条件下比较野生型和hd3a rft1双突变大米之间的基因表达模式.
主要方法:
- 从野生类型和hd3a rft1双突变大米SAM区域样本的时间转录组分析.
- 在经过长日生长42天,随后接受SD治疗后,基因表达特征的比较.
主要成果:
- 在野生类型和突变系之间确定了6978个差异表达基因 (DEG).
- 在SD治疗后观察到MADS盒基因 (FUL类,SEP类,AGL类) 的诱导.
- 发现花基因在植物生长过程中抑制了大约两千个基因,这些基因在SD治疗后会被缓解.
结论:
- 鲜花基因具有双重功能:抑制低表达水平的植物生长基因,促进高表达水平的花诱导.
- 低水平的花生表达可能会维持植物生长,这表明一种新的调节作用.
- 在SAM区域的昼夜时钟机械在花过渡期间独立于花基因运作.
相关概念视频
02:45Biological Clocks and Seasonal Responses
34.5K
The circadian—or biological—clock is an intrinsic, timekeeping, molecular mechanism that allows plants to coordinate physiological activities over 24-hour cycles called circadian rhythms. Photoperiodism is a collective term for the biological responses of plants to variations in the relative lengths of dark and light periods. The period of light-exposure is called the photoperiod.
34.5K
02:19Morphogenesis
23.4K
Plant morphogenesis—the development of a plant’s form and structure—involves several overlapping developmental processes, including growth and cell differentiation. Precursor cells differentiate into specific cell types, which are organized into the tissues and organ systems that make up the functional plant.
23.4K