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Magnesium sulfate

硫酸镁

Company: Sigma-Aldrich
Catalog#: 746452
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Measuring Extracellular Proton and Anionic Fluxes in Arabidopsis Pollen Tubes
Author:
Date:
2021-02-05
[Abstract]  

The ion-selective vibrating probe has been used to detect and quantify the magnitude and direction of transmembrane fluxes of several ions in a wide range of biological systems. Inherently non-invasive, vibrating probes have been essential to access relevant electrophysiological parameters related to apical growth and morphogenesis in pollen tubes, a highly specialized cell where spatiotemporal tuning of ion dynamics is fundamental. Of relevance, crucial processes to the cell physiology of pollen tubes associated with protons and anions have been elucidated using vibrating probes, allowing the identification of diverse molecular players underlying and regulating their extracellular fluxes. The use of Arabidopsis thaliana as a genetic model system posed new challenges given their

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[摘要]  [摘要]离子选择性振动探针已被用于检测和量化各种生物系统中几种离子的跨膜通量的大小和方向。固有Ñ上侵入性,振动探针已经必需访问有关在花粉管,与心尖生长和形态发生电生理参数高度专业化的细胞,其中离子动力学的时空调谐是根本。与此相关的是,已使用振动探针阐明了与质子和阴离子相关的花粉管细胞生理学的关键过程。 ,可以识别潜在分子并调节其细胞外通量。利用拟南芥作为遗传模型系统所带来的相对赋予了新的挑战LY尺寸小,不易操纵体外。在这里,我们描述了协议优化,该优化使在拟南芥花粉管中使用离子选择性振动探针成为可能,从而确保了一致且可重复的数据。Q这样的定量的方法启用表征离子转运蛋白的突变体表现型,这是不被明显形态学和生殖缺陷直接可检测的,提供了有价值的见解分子和细胞机制。可以将此处详述的用于量化细胞外质子和阴离子通量的方案调整为其他系统和物种,同时将样品制备方法应用于相关技术,从而促进对花粉管生长和发育的研究。

[背景]生物电和离子交换的对活体细胞的相关性是毋庸置疑的,具有一个功能影响的范围内的现象,从图案形成,信令和发展癌症和其他疾病(莱,2014)。多样的技术可以被用于检测动作电位,电场,胞外电流,和离子通量。然而,它们的功能评估在体内需要小号的非侵入性的方法。理想情况下,任何感兴趣的生物系统都应在尽可能少的干扰下和最生理的条件下进行研究。这些标准是由非侵入性的离子选择性振动探头,它已被用于在很宽的测量多个跨膜离子通量达到各种实验系统,包括果蝇(布朗和O'Donnell的,2016),斑马鱼(GUH的等。,2016),小鼠皮肤(孙等人,2015年),根(他等人,2015年),水蚤(Stensberg等,2014),C.线虫(Adlimoghaddam等,2014),等等。在花粉管中,使用离子选择性振动探针定量测量细胞外离子通量对于确定主要离子(尤其是Ca ...

Measurement of Net High-affinity Urea Uptake in Maize Plants
Author:
Date:
2015-06-05
[Abstract]  Despite its extensive use as a nitrogen fertilizer, the role of urea as a directly accessible nitrogen source for crop plants is still poorly understood. So far, the physiological and molecular aspects of urea acquisition have been investigated only in a few plant species highlighting the importance of a urea transporter in roots, DUR3 (Kojima et al., 2007; Wang et al., 2012; Zanin et al., 2014a). Regarding maize plants, a crop that needs a large amount of urea fertilizer, the capability to take up urea via an inducible and high-affinity transport system has been recently characterized (Zanin et al., 2014a; Zanin et al., 2014b). Here, we described a small-scale protocol suitable for the measurement of urea net high-affinity uptake in roots of ... [摘要]  尽管其作为氮肥的广泛使用,但是作为直接可及的作物植物氮源的脲的作用仍然知之甚少。 迄今为止,仅在少数植物物种中研究了尿素获取的生理学和分子学方面,突出了根中的尿素转运蛋白DUR3的重要性(Kojima等人,2007; et al。,2012; Zanin et al。,2014a)。 关于玉米植物,需要大量尿素肥料的作物,通过诱导型和高亲和力转运系统摄取尿素的能力最近已被表征(Zanin等人,2014a; Zanin et al。,2014b)。 在这里,我们描述了一个小规模的协议,适合测量尿素净高亲和力摄取完好的玉米植物的根。

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