Light and gravity signals synergize in modulating plant development.
Light and gravity signals synergize in modulating plant development.
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光和重力信号在调节植物的发展方面协同作用。
DOI：
10.3389/fpls.2014.00563
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发表时间：
2014
影响因子：
5.6
通讯作者：
Medina FJ
中科院分区：
文献类型：
--
作者：
Vandenbrink JP;Kiss JZ;Herranz R;Medina FJ
向性是植物生长介导的运动，帮助植物对环境刺激的变化做出反应。水和光的可用性，以及恒定重力矢量的存在，都是植物通过定向生长运动（向性）感知和响应的环境刺激。植物对重力的响应（向地性）和对单向光的响应（向光性）是相互关联的生长现象。在这里，我们讨论这两个过程的相似之处，以及已知的分子机制背后的回归性反应。我们还强调了在微重力环境中进行的研究，以便通过在没有重要的单边重力矢量的情况下进行的实验来解耦两个向性。此外，重力的改变，特别是微重力环境和光照对分生组织细胞，即维持植物发育的未分化的、高度增殖的、全能性的细胞产生重要影响。微重力导致分生组织能力的破坏，即细胞增殖和细胞生长的解耦，影响细胞周期和核糖体生物发生的调控。光敏色素介导的光照射，特别是红光，对这些过程具有激活作用。植物激素，特别是生长素，也是这些变化的关键介质。即将在国际空间站进行的实验将阐明植物对这些涉及趋向性和细胞周期的环境信号的反应的一些机制和分子参与者。
Tropisms are growth-mediated plant movements that help plants to respond to changes in environmental stimuli. The availability of water and light, as well as the presence of a constant gravity vector, are all environmental stimuli that plants sense and respond to via directed growth movements (tropisms). The plant response to gravity (gravitropism) and the response to unidirectional light (phototropism) have long been shown to be interconnected growth phenomena. Here, we discuss the similarities in these two processes, as well as the known molecular mechanisms behind the tropistic responses. We also highlight research done in a microgravity environment in order to decouple two tropisms through experiments carried out in the absence of a significant unilateral gravity vector. In addition, alteration of gravity, especially the microgravity environment, and light irradiation produce important effects on meristematic cells, the undifferentiated, highly proliferating, totipotent cells which sustain plant development. Microgravity produces the disruption of meristematic competence, i.e., the decoupling of cell proliferation and cell growth, affecting the regulation of the cell cycle and ribosome biogenesis. Light irradiation, especially red light, mediated by phytochromes, has an activating effect on these processes. Phytohormones, particularly auxin, also are key mediators in these alterations. Upcoming experiments on the International Space Station will clarify some of the mechanisms and molecular players of the plant responses to these environmental signals involved in tropisms and the cell cycle.
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影响因子：
10.5
作者：
Carabelli, Monica;Possenti, Marco;Ruberti, Ida
通讯作者：
Ruberti, Ida
影响因子：
5.6
作者：
Abbas M;Alabadí D;Blázquez MA
通讯作者：
Blázquez MA
影响因子：
8.5
作者：
Dai, Z. Q.;Wang, R.;Li, Y. H.
通讯作者：
Li, Y. H.
影响因子：
4.3
作者：
Baserga, Renato
通讯作者：
Baserga, Renato
影响因子：
3
作者：
BRIGGS, WR
通讯作者：
BRIGGS, WR