| 15N-nitrate Uptake Activity and Root-to-shoot Transport Assay in Rice
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Author:
Date:
2016-08-20
[Abstract] 15N is a nonradioactive heavy isotope of nitrogen, widely used for biochemical and physiological research in plants. For instance, 15N-KNO3 was used as the nitrogen source in plants in order to investigate nitrate uptake activity and transport from roots to shoots (Lin et al., 2008). Here, we describe a detailed pipeline used for labeling living rice (Oryza sativa) plants with 15N-KNO3 and determination of net nitrate uptake and transport activity, and this protocol was proved to be valid in Arabidopsis and rice ...
[摘要] N是氮的非放射性重同位素，广泛用于植物的生化和生理研究。 例如，使用N-KNO 3作为植物中的氮源，以研究硝酸盐吸收活性和从根到芽的转运（Lin等人 。， 2008）。 在这里，我们描述了用于标记具有 N-KNO 3的活水稻（>稻）植物和测定硝酸盐硝酸盐吸收的详细管道 和转运活性，并且该方案在拟南芥（Arabidopsis）和水稻中被证明是有效的（Lin等人，2008; Hu等人， 2015）。
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| DNA Slot Blot Repair Assay
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Author:
Date:
2015-04-20
[Abstract] Ultraviolet (UV) irradiation induces helix distorting photolesions such as cyclobutane pyrimidine dimers (CPD) and pyrimidine-pyrimidone (6-4) photoproducts (6-4PP) which threaten genomic integrity if unrepaired. In mammals, nucleotide excision repair (NER) is the only pathway that removes UV-induced DNA damages. Here we describe DNA slot blot repair assay for quantitative detection of NER activity using DNA damage specific antibodies such as anti-CPD and anti-6-4PP. Briefly, genomic DNA irradiated with UV was isolated from cells, and the genomic DNA was vacuum-transferred to a nitrocellulose ...
[摘要] 紫外线（UV）照射诱导螺旋扭曲光致损伤，例如环丁烷嘧啶二聚体（CPD）和嘧啶 - 嘧啶酮（6-4）光产物（6-4PP），如果未修复则威胁基因组完整性。 在哺乳动物中，核苷酸切除修复（NER）是去除UV诱导的DNA损伤的唯一途径。 在这里我们描述DNA狭缝印迹修复测定NER活性使用DNA损伤特异性抗体如抗CPD和抗6-4PP的定量检测。 简言之，从细胞中分离用UV照射的基因组DNA，使用Bio-Dot SF微量过滤装置（Bio-Rad）将基因组DNA真空转移到硝酸纤维素膜上。 应用识别CPD或6-4PP的单克隆抗体来检测基因组DNA中残留的光损伤量。 对于均匀负载的上样控制，可以通过SYBR金染色进一步分析DNA在膜上。
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