Growth-mediated plant movements: hidden in plain sight.

Growth-mediated plant movements: hidden in plain sight.
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DOI:
10.1016/j.pbi.2017.10.003
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发表时间:
2018-03
影响因子:
9.5
通讯作者:
Brooks CJ
Brooks CJ
中科院分区:
生物学2区
文献类型:
--
作者:
Harmer SL;Brooks CJ

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虽然快速的植物运动很壮观但很少见,但几乎所有植物都表现出相对缓慢的、由生长介导的热带运动,这是它们在自然世界中生存的关键。在这篇简短的综述中,我们讨论了最近的见解,向光性,向重力性,向水性,和autostraightening的分子机制。仔细的分子遗传学和生理学研究有助于证实生长素横向梯度在向重力和向光反应中的重要性。然而,生长素信号并不能解释所有的向性:最近的研究表明,脱落酸信号介导根向水性,并涉及自动拉直,器官拉直过程最近建模为本体感受反应的机械感应。不同的热带信号通路和其他内部和外部感觉过程之间的相互作用现在也被解开。
While fast plant movements are spectacular but rare, almost all plants exhibit relatively slow, growth-mediated tropic movements that are key to their survival in the natural world. In this brief review, we discuss recent insights into the molecular mechanisms underlying phototropism, gravitropism, hydrotropism, and autostraightening. Careful molecular genetic and physiological studies have helped confirm the importance of lateral auxin gradients in gravitropic and phototropic responses. However, auxin signaling doesn't explain all tropisms: recent work has shown that abscisic acid signaling mediates root hydrotropism and has implicated mechanosensing in autostraightening, the organ straightening process recently modeled as a proprioceptive response. The interactions between distinct tropic signaling pathways and other internal and external sensory processes are also now being untangled.
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