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公司名称: LI-COR
产品编号: LI-1400
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Experiments for in silico evaluation of Optimality of Photosynthetic Nitrogen Distribution and Partitioning in the Canopy: an Example Using Greenhouse Cucumber Plants
Author:
Date:
2020-03-20
[Abstract]  Acclimation of leaf traits to fluctuating environments is a key mechanism to maximize fitness. One of the most important strategies in acclimation to changing light is to maintain efficient utilization of nitrogen in the photosynthetic apparatus by continuous modifications of between-leaf distribution along the canopy depth and within-leaf partitioning between photosynthetic functions according to local light availability. Between-leaf nitrogen distribution has been intensively studied over the last three decades, where proportional coordination between nitrogen concentration and light ... [摘要]  [摘要 ] 使叶片性状适应不断变化的环境是最大化适应性的关键机制。适应光变化的最重要策略之一是通过不断修改沿冠层深度的叶间分布以及根据局部光的可用性在光合功能之间进行叶内分配来保持光合装置中氮的有效利用。叶片间氮分配 在过去的三十年中,人们对该技术进行了深入研究,其中在最大程度地提高冠层光合作用的同时,不考虑其他冠层的结构和生理因素,认为氮浓度和光梯度之间的比例协调是最佳的。我们提出了不同光合功能下蛋白质更新动态的力学模型,该模型可以使用在不同水平的恒定光照下生长的叶片进行参数化。通过将此动态模型集成到使用从温室实验收集的数据构建的多层冠层模型中,它使我们能够在计算机上测试光合作用氮的最佳程度,以在给定的光照环境下最大程度地利用冠层碳同化。

[背景 ] 帧内篷Ñ itrogen分布响应于光已被广泛研究(广濑和Werger ,1987; Werger 和广濑,1991; Anten 等人,1995; Dreccer 等人,2000;莫罗等人,2012; Hikosaka ,2016)和许多研究表明,尽管实际的氮分布导致冠层的光合作用高于均匀的氮分布,但仍然不是最优的(Field,1983; Evans,1993; Hollinger,1996; Hirose et al 。,1997; Meir 等人,2002; Wright 等人,2006;Hikosaka ...

Observation of Chloroplast Movement in Vallisneria
Author:
Date:
2015-11-05
[Abstract]  Chloroplasts accumulate to weak light and escape from strong light. These light-induced responses have been known from the 19th century (Böhm, 1856). Up to now, many scientists have developed different methods to investigate these dynamic phenomena in a variety of plant species including the model plant Arabidopsis thaliana, a terrestrial dicot (Wada, 2013). Especially, a serial recording to trace the position of individual chloroplast for the analysis of its mode of movement is critical to understand the underlying mechanism. An aquatic monocot Vallisneria (Alismatales: ... [摘要]  叶绿体累积到弱光并从强光中逃逸。这些光诱发的反应从19世纪就已知(Böhm,1856)。到目前为止,许多科学家已经开发了不同的方法来研究各种植物物种中的这些动态现象,包括模拟植物拟南芥(Arabidopsis thaliana),一种陆生双子叶植物(Wada,2013)。特别是,跟踪单个叶绿体的位置,用于分析其运动模式的连续记录对于理解底层机制至关重要。水生单子叶植物Vallisneria(Alismatales:Hydrocharitaceae,图1A)在一个世纪以来已经对这种研究作出贡献(Senn,1908; Zurzycki,1955; Seitz,1967),因为Vallisneria 叶具有在单层中有序排列的长方形表皮细胞(图1B),为显微镜研究提供了优良的实验系统。在这里我们描述了一个协议为最新的时间推移成像程序来分析Vallisneria 叶绿体运动。使用这个和原型程序,相关的光感受器系统(Izutani等人,1990; Dong等人,1995; Sakai等人, ,2015),与肌动蛋白细胞骨架的关联(Dong等人,1996; Dong等人,1998; Sakai和Takagi 2005; Sakurai等人,/sh>,2005),并且已经对Ca 2 + (Sakai等人,2015)的调节作用进行了深入研究。

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