Light triggers PILS-dependent reduction in nuclear auxin signalling for growth transition.
Light triggers PILS-dependent reduction in nuclear auxin signalling for growth transition.
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DOI：
10.1038/nplants.2017.105
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发表时间：
2017-07-17
期刊：
影响因子：
18
通讯作者：
Kleine-Vehn J
中科院分区：
文献类型：
--
作者：
Béziat C;Barbez E;Feraru MI;Lucyshyn D;Kleine-Vehn J
植物激素生长素诱导或抑制生长取决于其浓度和基本组织类型。然而，它仍然是未知的生长素信号是如何调制，使组织之间的抑制和促进生长的过渡。在这里，我们使用顶端钩发育作为植物生长转变的模型。一个PIN形成（PIN）依赖的细胞间生长素运输模块定义了一个生长素最大值，这是在顶端钩形成过程中生长抑制的原因。我们的数据表明，顶端钩开口的生长过渡在很大程度上是独立的PIN模块，但需要在内质网的PIN样（PILS）推定的生长素载体。PILS蛋白减少顶端钩中的核生长素信号传导，导致生长的去抑制和钩开放的开始。我们还表明，光敏色素（phy）B依赖的光信号通路直接调节PILS基因的活性，从而使光感知抑制核生长素信号和控制生长。我们提出了一种新的机制，其中PILS蛋白允许外部信号改变组织对生长素的敏感性，定义差异生长速率。
The phytohormone auxin induces or represses growth depending on its concentration and the underlying tissue type. However, it remains unknown how auxin signalling is modulated to allow tissues transiting between repression and promotion of growth. Here we used apical hook development as a model for growth transitions in plants. A PIN-FORMED (PIN)-dependent intercellular auxin transport module defines an auxin maximum that is causal for growth repression during the formation of the apical hook. Our data illustrates that growth transition for apical hook opening is largely independent of this PIN module, but requires the PIN-LIKES (PILS) putative auxin carriers at the endoplasmic reticulum. PILS proteins reduce nuclear auxin signalling in the apical hook, leading to the de-repression of growth and the onset of hook opening. We also show that the phytochrome (phy) B-reliant light-signalling pathway directly regulates PILS gene activity, thereby enabling light perception to repress nuclear auxin signalling and to control growth. We propose a novel mechanism, in which PILS proteins allow external signals to alter tissue sensitivity to auxin, defining differential growth rates.
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影响因子：
5.6
作者：
Abbas M;Alabadí D;Blázquez MA
通讯作者：
Blázquez MA
DOI：
10.1006/scel.1994.1039
发表时间：
1994-01-01
期刊：
Seminars in Cell Biology
影响因子：
--
作者：
Reed, Jason W.;Chory, Joanne
通讯作者：
Chory, Joanne
影响因子：
7.4
作者：
RUBINSTEIN, B
通讯作者：
RUBINSTEIN, B
影响因子：
7.7
作者：
Fendrych, Matyas;Leung, Jeffrey;Friml, Jiri
通讯作者：
Friml, Jiri
影响因子：
64.5
作者：
Stepanova, Anna N.;Robertson-Hoyt, Joyce;Alonso, Jose M.
通讯作者：
Alonso, Jose M.