| Simple Spectroscopic Determination of Nitrate, Nitrite, and Ammonium in Arabidopsis thaliana
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Author:
Date:
2017-05-20
[Abstract] Plants use nitrate, nitrite, and ammonium as inorganic nitrogen (N) sources. These N compounds are included in plant tissues at various concentrations depending on the balance between their uptake and assimilation. Thus, the contents of nitrate, nitrite, and ammonium are physiological indicators of plant N economy. Here, we describe a protocol for measurement of these inorganic N species in A. thaliana shoots or roots.
[摘要] 植物使用硝酸盐，亚硝酸盐和铵作为无机氮（N）源。这些N化合物根据其吸收和同化之间的平衡以各种浓度包含在植物组织中。因此，硝酸盐，亚硝酸盐和铵的含量是植物N经济的生理指标。在这里，我们描述了在A中测量这些无机N物质的方案。 thaliana 芽或根。
背景 无机氮含量的测定对于预测植物吸收和吸收氮的能力很重要。研究人员经常使用需要昂贵设备的技术，如高效液相色谱（HPLC），用于这些测量。本协议基于通用光谱法与廉价的试剂，使其适用于许多研究人员。在酸性条件下，硝酸盐引起水杨酸的硝化，随后加入碱性溶液会导致黄色复合物。在酸性条件下，亚硝酸盐与磺胺类反应产生重氮化合物，其与N - （1-萘基）乙二胺进行重氮偶联，形成粉红色偶氮化合物。在硝普钠盐的催化作用下，铵可以测定为蓝色靛酚衍生物。每个实验程序容易，快速，简单。
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| Measurement of ATP Hydrolytic Activity of Plasma Membrane H+-ATPase from Arabidopsis thaliana Leaves
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Author:
Date:
2016-12-05
[Abstract] Plant plasma membrane H+-ATPase, which is a P-type ATPase, couples ATP hydrolysis to H+ extrusion and thereby generates an electrochemical gradient across the plasma membrane. The proton gradient is necessary for secondary transport, cell elongation, and membrane potential maintenance. Here we describe a protocol for measurement of the ATP hydrolytic activity of the plasma membrane H+-ATPase from Arabidopsis thaliana leaves.
[摘要] 作为P型ATP酶的植物质膜H sup + -ATPase将ATP水解耦合到H + +/- 挤出，从而在质膜上产生电化学梯度。质子梯度对于二次转运，细胞伸长和膜电位维持是必需的。这里我们描述用于测量来自拟南芥叶片的质膜H + -ATPase的ATP水解活性的方案。
关键词： strong> 拟南芥，ATP水解活性，原钒酸盐，P-型ATP酶，血浆膜H + -ATPase
质膜H + -ATPase活性的测定对于阐明其功能和调节机制是重要的。然而，有时难以确定质膜H sup + -ATP酶的ATP水解活性，因为植物细胞含有许多ATP水解酶。该协议是基于Uemura和Yoshida（1986）和Kinoshita等人的出版物开发的。 （1995）。我们使用KNO 3作为V型ATP酶的抑制剂，钼酸铵作为酸性磷酸酶的抑制剂，寡霉素作为F型ATP酶的抑制剂，NaF作为磷酸酶的抑制剂（Shimazaki和Kondo ，1987; Kinoshita等人，1995）。原钒酸盐抑制P型ATP酶，并且因此可以通过评估来自ATP水解的钒酸盐敏感性P 1释放来用于测量质膜H sup + -ATP酶的活性。释放的P 1与钼酸盐反应形成蓝色络合物，然后可以通过测量在750nm的吸收来量化。
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| Preparation of Knockdown Transformants of Unicellular Charophycean Alga, Closterium peracerosum-strigosum-littorale Complex
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Author:
Date:
2016-05-20
[Abstract] To prepare the knockdown transformants of the Closterium peracerosum-strigosum-littorale (C. psl.) complex, particle bombardment was applied with a newly constructed vector (pSA0104) with an endogenous constitutive promoter fused to a DNA fragment corresponding to an antisense strand of a target gene. Using a hygromycin resistance gene (aph7”), hygromycin-resistant colonies were selected. After the second screening, integration of the vector into the genome was checked by PCR and the knockdown effect was evaluated by Western blotting using a specific antibody against the target protein.
[摘要] 为了制备鬼臼藓藻（Clonsterium peracerosum-strigosum-littorale）复合物的敲低转化体，用新构建的载体（pSA0104）应用粒子轰击，所述载体具有内源性 组成型启动子，其与对应于靶基因的反义链的DNA片段融合。 使用潮霉素抗性基因（ aph7"）选择潮霉素抗性菌落。 在第二次筛选后，通过PCR检查载体到基因组中的整合，并使用针对靶蛋白的特异性抗体通过蛋白质印迹评估敲低效应。
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