硫化减轻了由酸盐饥饿引起的根生长抑制
Tong Liu1, Hao Chen1, Sheng Luo1
1College of Life Science and Technology, Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China.
Plant, cell & environment
|August 23, 2024
概括
硫化 (H2S) 有助于阿拉比多普西斯植物在酸盐饥饿期间生长根. 这种由DES1产生的气体还能促进SQD1基因的表达,减轻生长抑制.
科学领域:
- 植物生理学 植物生理学
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- (P) 对植物发育至关重要.
- 硫化 (H2S) 赋予了植物对各种压力的耐受性.
- 酸盐 (Pi) 缺乏的植物中H2S的作用尚不清楚.
研究的目的:
- 为了研究在Pi缺陷压力下Arabidopsis thaliana中H2S的功能.
- 确定DES1介导的H2S在Pi饥饿期间调节根生长中的参与.
- 为了确定由H2S调节的下游基因,以应对Pi缺乏.
主要方法:
- 在Pi缺陷条件下对Arabidopsis突变物 (des1) 和过度表达线 (DES1ox) 的表型分析.
- 对外应用H2S供体 (NaHS) 来评估救援效应.
- 定量实时聚合酶链反应 (qRT-PCR) 用于分析基因表达变化.
主要成果:
- 在Pi饥饿下,des1突变体表现出明显较短的初级根,这是NaHS所拯救的表型.
- 与野生类型相比,DES1ox系表现出对Pi饥饿的耐受性增加,其根较长.
- 酸盐饥饿降低了des1突变体中的SQD1表达,而外源的H2S在野生型根中上调了SQD1.
结论:
- 通过DES1介导的H2S在Pi饥饿下调节Arabidopsis根生长起着至关重要的作用.
- H2S通过促进SQD1基因的表达来减轻Pi饥饿诱导的根生长抑制.
相关概念视频
02:26Preparation and Reactions of Sulfides
4.7K
Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.
4.7K
02:02Responses to Salt Stress
13.1K
Salt stress—which can be triggered by high salt concentrations in a plant’s environment—can significantly affect plant growth and crop production by influencing photosynthesis and the absorption of water and nutrients.
13.1K
02:41Responses to Drought and Flooding
10.6K
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.
10.6K
02:34Water and Mineral Acquisition
32.7K
Specialized tissues in plant roots have evolved to capture water, minerals, and some ions from the soil. Roots exhibit a variety of branching patterns that facilitate this process. The outermost root cells have specialized structures called root hairs that increase the root surface, thus increasing soil contact. Water can passively cross into roots, as the concentration of water in the soil is higher than that of the root tissue. Minerals, in contrast, are actively transported into root cells.
32.7K