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Company: Thermo Fisher Scientific
Catalog#: 05-408-138
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Assessing Rates of Long-distance Carbon Transport in Arabidopsis by Collecting Phloem Exudations into EDTA Solutions after Photosynthetic Labeling with [14C]CO2
Author:
Date:
2017-12-20
[Abstract]  Phloem loading and transport of photoassimilate from photoautotrophic source leaves to heterotrophic sink organs are essential physiological processes that help the disparate organs of a plant function as a single, unified organism. We present three protocols we routinely use in combination with each other to assess (1) the relative rates of sucrose (Suc) loading into the phloem vascular system of mature leaves (Yadav et al., 2017a), (2) the relative rates of carbon loading and transport through the phloem (this protocol), and (3) the relative rates of carbon unloading into heterotrophic sink organs, specifically roots, after long-distance transport (Yadav et al., 2017b), We propose that conducting all three protocols on experimental and control plants provides a ... [摘要]  来自光合自养源的光合同化物的韧皮部装载和运输到异养宿主器官是必不可少的生理过程,其帮助植物的不同器官作为单一的统一生物体起作用。我们提出了三种方案,我们经常使用它们相互结合来评估(1)蔗糖(Suc)加载到成熟叶片的韧皮部血管系统中的相对比率(Yadav等人,2017a), (2)通过韧皮部的碳载量和转运的相对速率(本方案);(3)长距离运输后碳向异养池器官,特别是根部卸载的相对速率(Yadav等,我们建议,在实验和对照植物上进行所有三种方案提供了全植物碳分配的可靠比较,并将与单独进行的单个方案相关的模糊度最小化(Dasgupta等人, 2014年;卡迪尔卡尔等人,2016年)。在该方案中,在源叶中光致同化[14C] CO 2 2-,并且通过将韧皮部流出物收集到EDTA溶液中,随后进行闪烁计数来量化光合同化物的韧皮部负载和转运。

【背景】通过韧皮部将光合自养源组织中的还原碳和其他化合物分配到异养池组织是影响植物生长和产量的关键生理过程。由于这一核心作用,有兴趣从植物生物学的许多领域分析和量化韧皮部含量。然而,收集真正的韧皮部汁液是困难的,因为易位流一般在高静水压力下,而且筛分元件具有快速的自密封机制以防止损坏时的损失。几种收集技术已经出现,但目前还没有一种方法或一组方法提供了一个完整的,无伪象的易位韧皮部液位测量方法。在这里,我们简要描述替代技术,然后详细描述我们的方法,收集韧皮部分泌物到含有低浓度乙二胺四乙酸(EDTA)的溶液中,然后用[14 ...

Extraction of Intracellular and Cell Wall Proteins from Leaves and Roots of Harsh Hakea
Author:
Date:
2015-12-05
[Abstract]  Plant proteins can be targeted to intracellular (i.e., cytosol, vacuole, organelles etc.) or extracellular (i.e., cell walls, apoplast) compartments. Dual targeting is a key mechanism with important implications for plant metabolism, growth, development and defense etc. Harsh Hakea (Hakea prostrata R.Br.) is a perennial species and member of the Proteaceae family that thrives on extremely phosphate impoverished soils of southwestern Australia. Harsh Hakea is not a common model organism, but has been widely developed for physiological and molecular/biochemical studies of the endogenous adaptations of an ‘extremophile’ plant species to abiotic stress, including low phosphorus tolerance. Tissues of Harsh Hakea contain large amounts of compounds (e.g. ... [摘要]  植物蛋白可以靶向细胞内(即胞质溶胶,液泡,细胞器等)或细胞外(即细胞壁,质外体)区室。双重靶向是对植物新陈代谢,生长,发育和防御等具有重要影响的关键机制。 Harsh Hakea( Hakea prostrata R.Br.)是一种多年生物种和成员的泛革兰科家族,在澳大利亚西南部的极端磷酸盐贫困土壤上生长。 Harsh Hakea不是一种常见的模式生物,而是广泛开发用于"极端"植物物种对非生物胁迫(包括低磷耐性)的内源性适应的生理学和分子/生物化学研究。 Harsh Hakea的组织含有大量干扰可溶性蛋白质提取的化合物(例如,酚类化合物)。我们以前优化了来自Harsh Hakea蛋白质组织根的细胞内蛋白质的提取,将可溶性蛋白质产量提高至少10倍(Shane等人,2013)。在这里,我们描述的提取和细胞内分离从"松散绑定"细胞壁蛋白质在Harsh Hakea的协议。

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