Temperature-dependent signal transmission in chloroplast accumulation response
Temperature-dependent signal transmission in chloroplast accumulation response
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DOI：
10.1007/s10265-017-0938-0
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发表时间：
2017-07-01
影响因子：
2.8
通讯作者：
Wada, Masamitsu
中科院分区：
文献类型：
--
作者：
Higa, Takeshi;Hasegawa, Satoshi;Wada, Masamitsu
叶绿体光移位运动是从植物到高等植物的一种光诱导反应，是植物提高光合效率和避免光损伤的重要现象。尽管陆地植物中的光感受器和通过叶绿体肌动蛋白丝的运动机制现已被揭示，但连接蓝光受体、向光蛋白和叶绿体的叶绿体积累运动信号仍有待确定。已经发现信号的特性;信号传输的速度约为1A μ m min（-1），并且用于累积响应的信号具有较长的寿命，并且比回避响应的信号传输更长的距离。在这里，为了收集未知信号物质的线索，我们研究了温度对蕨类植物铁线蕨的信号传输速度的影响，并发现信号传输的机制可能不依赖于物质的简单扩散，因此，还必须涉及一些化学反应。我们还发现了信号物质的新见解，例如微管不参与信号传递，信号甚至可以通过叶绿体和质膜之间的狭窄空间传递。
Chloroplast photorelocation movement, well-characterized light-induced response found in various plant species from alga to higher plants, is an important phenomenon for plants to increase photosynthesis efficiency and avoid photodamage. The signal for chloroplast accumulation movement connecting the blue light receptor, phototropin, and chloroplasts remains to be identified, although the photoreceptors and the mechanism of movement via chloroplast actin filaments have now been revealed in land plants. The characteristics of the signal have been found; the speed of signal transfer is about 1 A mu m min(-1) and that the signal for the accumulation response has a longer life and is transferred a longer distance than that of the avoidance response. Here, to collect the clues of the unknown signal substances, we studied the effect of temperature on the speed of signal transmission using the fern Adiantum capillus-veneris and found the possibility that the mechanism of signal transfer was not dependent on the simple diffusion of a substance; thus, some chemical reaction must also be involved. We also found new insights of signaling substances, such that microtubules are not involved in the signal transmission, and that the signal could even be transmitted through the narrow space between chloroplasts and the plasma membrane.