Inclination not force is sensed by plants during shoot gravitropism.
Inclination not force is sensed by plants during shoot gravitropism.
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DOI：
10.1038/srep35431
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发表时间：
2016-10-14
影响因子：
4.6
通讯作者：
Moulia B
中科院分区：
文献类型：
--
作者：
Chauvet H;Pouliquen O;Forterre Y;Legué V;Moulia B
重力感知在植物如何发育和适应环境变化中起着关键作用。然而，在达尔文的开创性工作之后的世纪，人们对传感机制知之甚少。使用离心装置结合生长运动学成像，我们表明，拍摄向重力反应稳定的重力水平在四个代表性的被子植物物种是独立的重力强度。测试的所有向重力响应仅取决于与重力方向的倾斜角。因此，我们证明，拍摄gravitropism是刺激感应倾斜，而不是重力或加速度，如以前所认为的。这与脊椎动物内耳中的耳石系统形成对比，并解释了尽管受到风振等扰动，植物仍能控制生长方向的鲁棒性。我们的研究结果将有助于重新定位寻找连接平衡石移动信号转导的分子机制。
Gravity perception plays a key role in how plants develop and adapt to environmental changes. However, more than a century after the pioneering work of Darwin, little is known on the sensing mechanism. Using a centrifugal device combined with growth kinematics imaging, we show that shoot gravitropic responses to steady levels of gravity in four representative angiosperm species is independent of gravity intensity. All gravitropic responses tested are dependent only on the angle of inclination from the direction of gravity. We thus demonstrate that shoot gravitropism is stimulated by sensing inclination not gravitational force or acceleration as previously believed. This contrasts with the otolith system in the internal ear of vertebrates and explains the robustness of the control of growth direction by plants despite perturbations like wind shaking. Our results will help retarget the search for the molecular mechanism linking shifting statoliths to signal transduction.
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影响因子：
2.8
作者：
Soga, Kouichi;Kotake, Toshihisa;Hoson, Takayuki
通讯作者：
Hoson, Takayuki
DOI：
10.1073/pnas.1214301109
发表时间：
2013-01-08
影响因子：
11.1
作者：
Bastien, Renaud;Bohr, Tomas;Douady, Stephane
通讯作者：
Douady, Stephane
影响因子：
4.3
作者：
Mullen, JL;Ishikawa, H;Evans, ML
通讯作者：
Evans, ML
影响因子：
7.4
作者：
SHENMILLER, J;HINCHMAN, R;GORDON, SA
通讯作者：
GORDON, SA
影响因子：
5.6
作者：
Strohm AK;Barrett-Wilt GA;Masson PH
通讯作者：
Masson PH