由OsHKT2介导的米Na+吸收;1影响了Cs+转移,在低K环境下从根部转移到芽部
Satomi Kanno1,2,3, Shigeto Fujimura4, Junko Takahashi2,5
1Institute for Advanced Research, Nagoya University, Nagoya, Japan.
Frontiers in plant science
|October 30, 2024
概括
-137 (Cs) 的污染对作物安全构成风险. 这项研究表明,大米中的OsHKT2;1基因通过影响 (Na+) 水平来调节积,而不是直接运输.
科学领域:
- 植物分子生物学 植物分子生物学
- 环境科学环境科学
- 农业科学 农业科学
背景情况:
- 核事故释放放射性-137 (Cs),影响安全的作物生产.
- 离子 (Cs+) 在植物中模仿离子 (K+),利用K+运输机制.
- 在大米中控制137Cs运输的特定基因和机制仍然不完全理解.
研究的目的:
- 为了研究OsHKT2;1在低条件下的中Cs运输中的作用.
- 确定OsHKT2;1是否直接促进Cs的吸收或影响其转移.
主要方法:
- 在受Cs污染的田地种植一种突变大米系 (hkt2;1)
- 在植物组织中分析137Cs, (K+) 和 (Na+) 度.
- 在水培系统中进行放射性追踪剂吸收实验 (Na++,K++,Cs+) 在水培系统中.
主要成果:
- 与野生型大米相比,hkt2;1突变体在地表组织中显示出更高的137Cs积累.
- (K+) 水平没有改变,但 (Na+) 水平在hkt2;1突变中较低.
- 水培实验表明,在低K条件下,芽中Na+和Cs+的积累之间存在负相关性.
结论:
- OsHKT2;1没有直接运输Cs+但在调节其转移方面发挥着至关重要的作用.
- OsHKT2;1通过调节Na吸收来控制Cs的积累.
- 在水种植期间管理Na+环境为控制作物中的Cs含量提供了一个潜在的策略.
关键词:
米树 (Oryza sativa) L. 米树 (Oryza sativa) L. 米树 (Oryza sativa) 是一个植物.在 OsHKT2;12;1是一种.和是一种安全食品生产安全食品生产酸盐的使用方法运输商 运输商 运输商 运输商更多相关视频
相关概念视频
02:02Responses to Salt Stress
13.0K
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.
13.0K
02:34Water and Mineral Acquisition
32.0K
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.
32.0K
02:12Short-distance Transport of Resources
15.6K
Short-distance transport refers to transport that occurs over a distance of just 2-3 cells, crossing the plasma membrane in the process. Small uncharged molecules, such as oxygen, carbon dioxide, and water, can diffuse across the plasma membrane on their own. In contrast, ions and larger molecules require the assistance of transport proteins due to their charge or size. Transport across membranes also occurs within individual cells, playing a variety of essential roles for the plant as a whole.
15.6K
01:17Reabsorption and Secretion in the Loop of Henle
1.0K
The thick ascending limb of the nephron loop has Na+–K+–2Cl− symporters in the apical membranes of its cells. These symporters simultaneously reclaim one sodium ion, one potassium ion, and two chloride ions from the tubular fluid. Sodium ions are actively transported into the interstitial fluid at the base and sides of the cell, diffusing into the vasa recta. Chloride ions move through leakage channels in the basolateral membrane into the interstitial fluid and then into the...
1.0K
02:35Key Elements for Plant Nutrition
18.7K
Like all living organisms, plants require organic and inorganic nutrients to survive, reproduce, grow and maintain homeostasis. To identify nutrients that are essential for plant functioning, researchers have leveraged a technique called hydroponics. In hydroponic culture systems, plants are grown—without soil—in water-based solutions containing nutrients. At least 17 nutrients have been identified as essential elements required by plants. Plants acquire these elements from the...
18.7K
01:20Tonicity in Plants
30.1K
Plant cells maintain appropriate osmotic balance in extreme conditions. For instance, plants in dry environments store water in vacuoles, limit the opening of their stoma, and have thick, waxy cuticles to prevent unnecessary water loss. Some species of plants that live in salty environments store salt in their roots. As a result, water osmosis occurs in the root from the surrounding soil.
Tonicity
Tonicity describes the capacity of a cell to lose or gain water depending on the solute...
Tonicity
Tonicity describes the capacity of a cell to lose or gain water depending on the solute...
30.1K