寒冷挑战期间的橄甲脂产量在早期分离的血统中得到保护
Allison C Barnes1, Jennifer L Myers1,2, Samantha M Surber1
1Department of Biochemistry, University of Nebraska-Lincoln, Lincoln, NE, USA.
Journal of experimental botany
|June 26, 2023
概括
橄甲脂的生产有助于在各种植物物种的严寒中生存. 这种反应可能是由细胞酸酸化引发的,这表明耐寒性和古老的损伤反应机制的多种进化起源.
科学领域:
- 植物生理学 植物生理学
- 进化生物学 进化生物学
- 分子生物学分子生物学
背景情况:
- 严重的寒冷对植物构成重大威胁,需要特定的生存机制.
- 在Arabidopsis thaliana中,橄甲脂的产生是已知的对严重感冒的反应,由细胞酸性酸化引发.
- 严重感冒反应的进化起源和信号通路仍然不完全理解.
研究的目的:
- 为了调查藻脂产生的进化起源,作为植物谱系中严重的寒冷反应.
- 探索包括细胞酸性酸化在内的信号传递机制,涉及到不同植物物种中的橄甲脂生产.
- 为了确定温度,细胞损伤和橄甲脂产生的关系,与物种特定的寒冷耐受性相关.
主要方法:
- 较量分析从植物到芽种类的物种中藻脂产生的情况.
- 在不同温度条件下测量橄甲脂水平.
- 分析与寒冷压力和橄甲脂生产相关的转录组变化.
- 检查温度,损伤和橄甲脂合成之间的相关性.
主要成果:
- 在不同的植物群中,橄甲脂的产量有显著的变化,这表明重寒耐受性的多个独立进化起源.
- 一些物种在对照条件下表现出较高的橄甲脂产量,而不是冷压样本.
- 观察到温度,细胞损伤和橄甲脂产量之间存在强烈的相关性,这种相关性随着每种物种的寒冷耐受性而变大.
- 有证据表明,细胞酸酸化是许多芽细胞中藻脂生产的保存信号机制.
结论:
- 橄甲脂的产生是陆地植物保存的严重寒冷反应,可能源于古代的损伤反应.
- 细胞酸盐酸化似乎是一个常见的信号通路,在各种物种中激活了橄甲脂生产.
- 这项研究突出了植物应对严重寒冷压力的各种进化策略.
更多相关视频
14:53Techniques for the Evolution of Robust Pentose-fermenting Yeast for Bioconversion of Lignocellulose to Ethanol
Published on: October 24, 2016
11.3K
08:11Author Spotlight: Understanding Microbe Adaptation Using Innovative Techniques for Exploring Thermophilic Evolution
Published on: June 14, 2024
824
相关概念视频
01:19Formation of Lipopolysaccharides
54
Lipopolysaccharides (LPS) are crucial components of the outer membrane of Gram-negative bacteria, serving both structural and functional roles. It contributes to membrane stability and protects bacteria from host immune responses. LPS is composed of three major regions—lipid A, a core oligosaccharide, and an O antigen. The biosynthesis and assembly of LPS involve a highly coordinated set of enzymatic reactions and transport mechanisms. Additionally, LPS is recognized as an endotoxin,...
54
01:29Biosynthesis of Lipids
40
Microbial membranes exhibit remarkable diversity in lipid composition, reflecting evolutionary adaptations to various environmental conditions. The three domains of life—Bacteria, Archaea, and Eukarya—synthesize membrane lipids through distinct biosynthetic pathways, leading to fundamental structural differences that impact membrane stability, function, and adaptability.Fatty Acid-Based Lipids in Bacteria and EukaryaBacteria and eukaryotes share a common fatty acid biosynthesis...
40
01:29Archaeal Cell Wall
54
Archaeal cell walls are structurally and compositionally distinct from their bacterial counterparts, lacking the characteristic peptidoglycan layer found in most bacteria. Instead, archaeal cell walls exhibit remarkable diversity, utilizing materials such as pseudomurein, polysaccharides, and proteins to construct their protective outer layers. This structural flexibility is closely tied to archaea's ecological adaptability.S-Layers: The Common Archaeal Cell WallThe S-layer is the most...
54
01:24Oligosaccharide Assembly
2.9K
Protein glycosylation starts in the ER lumen and continues in the Golgi apparatus. Glycosyltransferases catalyze the addition of sugar molecules or glycosylation of proteins. Usually, these enzymes add sugars to the hydroxyl groups of selected serine or threonine residues to form O-linked glycans or the amino groups of asparagine residues to form N-linked glycans. Different positions on the same polypeptide chain can contain differently linked glycans.
Multiple sugar molecules that may or may...
Multiple sugar molecules that may or may...
2.9K
01:35Asymmetric Lipid Bilayer
7.3K
Biological membranes show uneven distribution of different types of lipids in the inner and outer layers, resulting in transverse asymmetric membranes. The treatment of the erythrocyte membrane with the enzyme phospholipase confirmed the asymmetric nature of the lipid bilayer. The enzyme hydrolyzes lipids into fatty acids and hydrophilic groups. The phospholipase acts only on the outer layer of the membrane, while the inner layer remains intact. The phospholipase treatment resulted in 80%...
7.3K
01:23Stringent Response in E. coli
32
Bacterial growth is closely tied to nutrient availability, with cells proliferating exponentially under favorable conditions and entering a stationary phase when resources become scarce. This transition is mediated by a regulatory mechanism known as the stringent response, which allows bacteria to adapt to nutrient deprivation by modulating gene expression and metabolic activity.During nutrient scarcity, intracellular amino acid levels decline. It results in the accumulation of uncharged tRNAs...
32