相关实验视频
Updated: Feb 4, 2026

09:23
Lateral Root Inducible System in Arabidopsis and Maize
Published on: January 14, 2016
14.4K
乙烯抑制等离子膜H+-ATPase降低根Na+在玉米中的排放以打破Na+/H+在盐应激下稳态
Qiuxia Li1, Xilei Wang1, Shihao Lv1
1State Key Laboratory of Plant Environmental Resilience, Engineering Research Center of Plant Growth Regulator, Ministry of Education, College of Agronomy and Biotechnology, China Agricultural University, Beijing, China.
Plant, cell & environment
|February 2, 2026
概括
乙烯在盐应激下负面调节玉米根中的 (Na+) 和质子 (H+) 稳态. 降低玉米中的乙烯含量可以通过增强Na+排放和减少Na+积累来提高盐分耐受性.
科学领域:
- 植物生理学 植物生理学
- 分子生物学分子生物学
- 农业科学 农业科学
背景情况:
- 乙烯对植物生长和应激反应至关重要.
- 乙烯调节/离子 (Na+/H+) 恒温和玉米盐耐受性的机制尚未完全理解.
- 乙烯生物合成基因ZmACO2是由玉米中的盐应激诱导的.
研究的目的:
- 研究乙烯在盐应激下调节玉米中Na+/H+恒温的作用.
- 阐明ZmACO2在调解玉米盐耐受性的作用.
主要方法:
- 使用过度表达ZmACO2-的 (ACO2-OE) 和突变的 (aco2-cr) 玉米植物.
- 在植物组织中评估了Na+和K+离子的积累和比率.
- 测量了ZmSOS1,ZmHKT1和ZmMHA2.2的基因表达水平.
- 量化了血膜H+-ATPase活性和Na+排放/H+流入的抑制效率.
主要成果:
- 与野生类型和ACO2-OE植物相比,aco2-cr突变体的Na+积累和Na+/K+比率明显较低.
- 突变者表现出ZmSOS1和ZmHKT1的表达增加,增强了根的Na+流量,并减少了根到芽的Na+运输.
- aco2-cr突变体表现出更高的ZmMHA2表达和血H+-ATPase活性,促进SOS1功能的根H+流量.
- ACO2-OE植物表现出盐敏感性,而aco2-cr突变体表现出更好的盐耐受性.
结论:
- 盐诱导的乙烯抑制了血H+-ATPase和SOS1,破坏了Na+/H+稳态,并减少了玉米根中的Na+流量.
- 降低乙烯水平可以通过优化Na+/H+平衡来提高玉米盐的耐受性.
- 操纵乙烯水平是改善玉米盐分耐受性的潜在策略.
相关概念视频
Responses to Salt Stress
14.6K
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.
14.6K
Responses to Heat and Cold Stress
14.8K
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.
14.8K
Enlargement of the Plasma Membrane
2.4K
Cell division and enlargement are processes that require precise control. The control ensures that cell division cannot proceed unless the cell has grown to a specific size. A spherical, dividing cell requires an approximately 1.6X increase in its surface area to double its volume. The secretory pathway also has a significant role in cell membrane enlargement. Secretory vesicles that bud off from the Golgi apparatus and later fuse with the plasma membrane during exocytosis are a major source of...
2.4K
Plasma Membrane in Bacteria and Archaea
1.8K
The plasma membrane is an essential cellular structure responsible for maintaining cellular integrity and regulating the selective transport of molecules. While bacteria and archaea share the fundamental function of plasma membranes, their structural and molecular differences reflect adaptations to distinct ecological and physiological challenges.Bacterial Plasma MembranesBacterial plasma membranes are predominantly composed of phospholipids with fatty acid chains ester-linked to a glycerol...
1.8K
What is Homeostasis?
54.9K
Maintaining homeostasis requires that the body continuously maintain its internal conditions. Each physiological condition has a particular set point, from body temperature to blood pressure to levels of certain nutrients. A set point is the physiological value around which the normal range fluctuates. A normal range is a restricted set of values that is optimally healthful and stable. For example, the set point for normal human body temperature is approximately 37°C (98.6°F).
54.9K
pH Homeostasis
18.9K
Acid-base homeostasis is essential for maintaining normal physiological activities in humans. The pH of various body fluids is strictly regulated because it is critical for the optimal activity of enzymes involved in metabolic reactions. Enzymes are basically proteins, so, any significant change in pH can affect their structure and activity. In humans, pH is regulated using three primary mechanisms— chemical buffer systems, respiratory regulation, and renal regulation.
Respiratory...
Respiratory...
18.9K

