相关实验视频

Updated: May 15, 2025

Pattern-Triggered Oxidative Burst and Seedling Growth Inhibition Assays in Arabidopsis thaliana

Pattern-Triggered Oxidative Burst and Seedling Growth Inhibition Assays in Arabidopsis thaliana

Published on: May 21, 2019

在Arabidopsis中形成的二胺需要DPH1相互作用的DPH2来抵抗光和氧化应激

Hongliang Zhang¹, Nadežda Janina¹, Koray Ütkür²

¹Molecular Genetics and Physiology of Plants, Faculty of Biology and Biotechnology, Ruhr University Bochum, Bochum 44801, Germany.

Plant physiology

|April 9, 2025

概括

该研究确定了Arabidopsis中的DPH2,揭示了它与DPH1一起在二胺生物合成,转化忠实性和植物应激反应中的重要作用.

科学领域:

植物生物学植物生物学
分子生物学分子生物学
生物化学生物化学

背景情况:

二胺是真核细胞翻译延长因子2 (eEF2) 的一个关键的翻译后修饰.
在酵母和哺乳动物中,Dph1和Dph2蛋白质是二胺生物合成的关键.
二甲胺基修饰对于细胞功能至关重要,是二甲菌毒素的目标.

研究的目的:

为了识别和描述Arabidopsis thaliana中的DPH2基因.
研究阿拉比多普西斯DPH2 (AtDPH2) 在二胺生物合成中的作用及其与AtDPH1.1的关系.
确定AtDPH2缺乏对植物生长,转化忠度和应激耐受性的影响.

主要方法:

阿拉比多普西斯dph2突变的基因鉴定和特征.
对二甲胺水平和eEF2修改状态的分析.
根和花生长的表型分析.
测量核糖体框架转移错误率.
评估RAPAMYCIN (TOR) 激酶活动的TARGET.
评估应激反应 (光强度,氧化应激,重金属,热冲击).
转录基因分析 (RNA测序).
酵母补充试验.酵母补充试验.

主要成果:

鉴定了Arabidopsis DPH2并证明它对二胺生物合成至关重要,局部化到细胞质中并与AtDPH1.1相互作用.
dph2突变体表现出生长受损 (根较短,花束较小),翻译错误增加,TOR激酶活性降低,反映dph1突变体.
无论是dph1还是dph2突变,都对高光强度和氧化应激具有过敏性,野生型植物在氧化应激下积累未经修改的eEF2.
突变者表现出许多涉及环境和激素反应的转录的放松调节.
而AtDPH1和AtDPH2并没有补充酵母突变.

结论:

在二胺基形成中,AtDPH1和AtDPH2的功能相互依赖,确保了Arabidopsis的翻译忠实性,正常生长和TOR激酶激活.
这些蛋白质在减轻高光和氧化应激造成的损伤方面发挥着至关重要的作用.
在氧化压力下丢失的二胺可能会通过前循环触发下游效应,影响植物生长和应激反应.

更多相关视频

Analysis of Arabidopsis thaliana Growth Behavior in Different Light Qualities

Analysis of Arabidopsis thaliana Growth Behavior in Different Light Qualities

Published on: February 2, 2018

A Flexible Low Cost Hydroponic System for Assessing Plant Responses to Small Molecules in Sterile Conditions

A Flexible Low Cost Hydroponic System for Assessing Plant Responses to Small Molecules in Sterile Conditions

Published on: August 25, 2018

相关概念视频

Photosystem II

Photosystem II

The multi-protein complex photosystem II (PS II) harvests photons and transfers their energy through its bound pigments to its reaction center, and ultimately to photosystem I (PSI) through the electron transport chain. The pigments responsible for caputirng the light energy in photosystems include chlorophyll a, chlorophyll b, and carotenoids.
The pigment molecules are arranged across two photosystem domains — the antenna complex and the reaction center. The main aim of the pigment...

Cell Signaling in Plants

Cell Signaling in Plants

Plant cells communicate to coordinate their cycle of growth, flowering and fruiting, and activities in roots, shoots, and leaves in response to the changing environmental conditions. Plant signaling is distinct from animal signaling. Plants primarily utilize enzyme-linked receptors, whereas the largest class of cell-surface receptors in animals are G-protein coupled receptors (GPCRs). Unlike animals, receptor tyrosine kinases are rare in plants. Instead, plants have a diverse class of...

Responses to Drought and Flooding

Responses to Drought and Flooding

Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.

Responses to Heat and Cold Stress

Responses to Heat and Cold Stress

Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.

Photoreceptors and Plant Responses to Light

Photoreceptors and Plant Responses to Light

Light plays a significant role in regulating the growth and development of plants. In addition to providing energy for photosynthesis, light provides other important cues to regulate a range of developmental and physiological responses in plants.