The time of day effects of warm temperature on flowering time involve PIF4 and PIF5.
The time of day effects of warm temperature on flowering time involve PIF4 and PIF5.
复制标题
温度温度对开花时间的影响涉及PIF4和PIF5。
DOI：
10.1093/jxb/ert487
复制
发表时间：
2014-03
影响因子：
6.9
通讯作者：
Harmon FG
中科院分区：
文献类型：
--
作者：
Thines BC;Youn Y;Duarte MI;Harmon FG
温暖的温度促进拟南芥开花，这种反应涉及多种信号通路。为了了解温度感知的时间动态，进行了测试以确定是否存在对温暖温度（28°C）敏感性增强的每日窗口。白天、夜间或连续施加温暖温度会导致提前开花，但每种处理的效果并不相同。暴露于暖夜 (WN) 条件下的植物几乎与持续温暖 (CW) 条件下的植物一样早开花，而暖日 (WD) 处理则导致比 WN 或 CW 更晚开花。每种条件下的开花都不同程度地依赖于 CO 、 FT 、 PIF4 和 PIF5 的活性以及未知基因的作用。开花涉及的信号通路的组合取决于温度提示的时间。 WN处理导致CO节律表达波形显着提前，这与FT表达的显着上调相关，而WD处理导致CO表达变化有限并且没有刺激FT表达。 WN和WD诱导的开花部分地不依赖于CO，并且出人意料地依赖于PIF4和PIF5。 pif4-2、pif5-3 和 pif4-2 pif5-3 突变体在所有三种温暖条件下均延迟开花。双突变体在对照条件下也开花晚。此外，仅 WN 条件就会选择性地改变 PIF4 和 PIF5 的表达。因此，PIF4和PIF5转录因子至少通过两种方式促进开花：在WN中诱导FT表达以及在WD中通过未知机制在FT之外发挥作用。温暖温度信号的时间决定了拟南芥早期开花反应的程度以及 CO、FT、PIF4 和 PIF5 对促进开花的贡献。
Warm temperature promotes flowering in Arabidopsis thaliana and this response involves multiple signalling pathways. To understand the temporal dynamics of temperature perception, tests were carried out to determine if there was a daily window of enhanced sensitivity to warm temperature (28 °C). Warm temperature applied during daytime, night-time, or continuously elicited earlier flowering, but the effects of each treatment were unequal. Plants exposed to warm night (WN) conditions flowered nearly as early as those in constant warm (CW) conditions, while treatment with warm days (WD) caused later flowering than either WN or CW. Flowering in each condition relied to varying degrees on the activity of CO , FT , PIF4 , and PIF5 , as well as the action of unknown genes. The combination of signalling pathways involved in flowering depended on the time of the temperature cue. WN treatments caused a significant advance in the rhythmic expression waveform of CO, which correlated with pronounced up-regulation of FT expression, while WD caused limited changes in CO expression and no stimulation of FT expression. WN- and WD-induced flowering was partially CO independent and, unexpectedly, dependent on PIF4 and PIF5 . pif4-2, pif5-3, and pif4-2 pif5-3 mutants had delayed flowering under all three warm conditions. The double mutant was also late flowering in control conditions. In addition, WN conditions alone imposed selective changes to PIF4 and PIF5 expression. Thus, the PIF4 and PIF5 transcription factors promote flowering by at least two means: inducing FT expression in WN and acting outside of FT by an unknown mechanism in WD. The timing of warm temperature cues dictates the magnitude of the early flowering response in Arabidopsis thaliana and the contribution of CO, FT, PIF4, and PIF5 to promotion of flowering.
登录
查看更多内容
影响因子：
9.5
作者：
Imaizumi, Takato
通讯作者：
Imaizumi, Takato
影响因子：
9.2
作者：
Jaeger, Katja E.;Wigge, Philip A.
通讯作者：
Wigge, Philip A.
影响因子：
7.2
作者：
Alabadi, David;Gallego-Bartolome, Javier;Blazquez, Miguel A.
通讯作者：
Blazquez, Miguel A.
影响因子：
56.9
作者：
Guo, HW;Yang, WY;Lin, CT
通讯作者：
Lin, CT
影响因子：
4.9
作者：
Brock, Marcus T.;Maloof, Julin N.;Weinig, Cynthia
通讯作者：
Weinig, Cynthia