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Chlorophyll Meter SPAD-502Plus

公司名称: Konica Minolta
产品编号: SPAD-502Plus
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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
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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 ...

Infection of Soybean Plants with the Insect Bacterial Symbiont Burkholderia gladioli and Evaluation of Plant Fitness
Author:
Date:
2017-12-20
[Abstract]  To investigate the establishment and consequences of host-microbe interactions, it is important to develop controlled infection assays suitable for each system, as well as appropriate methods to evaluate successful infection and its associated effects. Here, we describe a procedure for bacterial inoculation of soybean plants, followed by the assessment of systemic infection and impact on plant fitness. Soybean (Glycine max) seedlings were mechanically wounded using a device that mimics insect herbivory and inoculated with known cell numbers of Burkholderia gladioli bacteria ... [摘要]  为了研究宿主 - 微生物相互作用的建立和后果,开发适用于每个系统的受控感染测定法以及评估成功感染及其相关作用的适当方法是重要的。在这里,我们描述了大豆植物的细菌接种程序,然后评估全身感染和对植物健康的影响。使用模拟昆虫食草动物的装置对大豆(Glycine max)幼苗进行机械性伤害,并用先前从昆虫宿主分离的已知细胞数目的伯克霍尔德氏菌(B.coli)进行接种。通过监测植物发育过程中身高,开花时间和叶绿素含量的变化以及通过与用无菌水接种的植物相比量化种子产量来评估对植物的影响。使用定量PCR和荧光原位杂交(FISH)在来自发育植物的组织中检查细菌感染的存在和增殖。

微生物与不同的真核生物建立共生关系,对宿主的适应性有着深远的影响,从有益到不利(Frank,1997)。在许多情况下,这些协会是直接或间接的影响与其他生物,如潜在的替代主机相互作用。举例来说,植物,微生物和昆虫之间有许多三方相互作用,其中微生物共生体在不同宿主之间传播并影响相关生物体的生理或生态(Frago等人)。 ,2012; Gilbert et al。,2012)。在植物性的Lagriinae甲虫中,与来自植物致病性分支的细菌(Burkholderia gladioli)建立了共生伙伴关系,表明这种关联在三方相互作用的情况下发展。先前已经证明了从 Lagria villosa ...

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