足够的增强了抵抗力,改变了克拉米多马纳斯 (Chlamydomonas reinhardtii) 中的积累
Huize Guan1, Zhongquan Jiang1, Danqing Sun1
1College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, China.
Environmental toxicology and chemistry
|June 7, 2023
概括
较高的 (P) 供应增强了微藻的生长和抵抗 (Pb) 毒性的能力. 增加的P还会改变克拉米多马纳斯硬化菌中的Pb积累和去除机制.
科学领域:
- 环境毒理学环境毒理学
- 微藻的生态毒理学
- 生物地质化学生物地质化学
背景情况:
- (P) 对于藻类生长和抗压能力至关重要.
- 供应对 (Pb) 毒性和微藻中的积累的影响尚不清楚.
研究的目的:
- 为了研究不同度对克拉米多马纳斯 (Chlamydomonas reinhardtii) 对毒性的反应的影响.
- 阐明在微藻中的积累和抵抗机制中的作用.
主要方法:
- 在两种P度下 (低P[PL]和高P[PH]) 培养Chlamydomonas reinhardtii.
- 将藻类暴露在各种Pb处理中 (05000μg L-1).
- 测量细胞生长,呼吸,光合作用损伤,Pb2+度,Pb去除,细胞外物质和基因表达.
主要成果:
- 高P (PH) 促进细胞生长,与低P (PL) 相比,呼吸减少了50%左右.
- PH减轻了Pb诱导的光合作用损伤.
- Pb的积累和去除因P度和Pb暴露水平而异,PH显示Pb2+较少,但在高Pb度下更有去除.
- 增加的P供应增强了细胞外光物质的分泌.
结论:
- 在调节毒性和在Chlamydomonas reinhardtii中的积累方面发挥着至关重要的作用.
- P供应影响Pb的吸收,去除和细胞抵抗机制.
- 研究结果强调了微藻对重金属压力的反应中营养状况的重要性.
相关概念视频
Responses to Salt Stress
13.2K
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.
13.2K
The Phosphorus Cycle
37.8K
Unlike carbon, water, and nitrogen, phosphorus is not present in the atmosphere as a gas. Instead, most phosphorus in the ecosystem exists as compounds, such as phosphate ions (PO43-), found in soil, water, sediment and rocks. Phosphorus is often a limiting nutrient (i.e., in short supply). Consequently, phosphorus is added to most agricultural fertilizers, which can cause environmental problems related to runoff in aquatic ecosystems.
37.8K
Channel Rhodopsins
2.6K
Most organisms use photoreceptors to sense and respond to light. Examples of photoreceptors include bacteriorhodopsins and bacteriophytochromes in some bacteria, phytochromes in plants, and rhodopsins in the photoreceptor cells of the vertebral retina. The light-sensitive property of these receptors is because of the bound chromophores, such as bilin in the phytochromes and retinal in the rhodopsins.
Rhodopsins belong to the family of cell surface proteins called G-protein coupled receptors,...
Rhodopsins belong to the family of cell surface proteins called G-protein coupled receptors,...
2.6K
Synthesis of Phosphatidylcholine in the ER Membrane
3.2K
The ER synthesizes lipids for building cell membranes and performing cellular functions such as energy storage and signaling. The lipid synthesis machinery embedded in the ER membrane primarily collects all reactants from the cytosol. Following synthesis, the secretory pathway and the ER contact sites distribute these lipids to other cellular organelles. Additionally, the energy-rich triacylglycerides are transported from the ER via lipid droplets.
The major components of all eukaryotic cell...
The major components of all eukaryotic cell...
3.2K


