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相关概念视频

Short-distance Transport of Resources02:12

Short-distance Transport of Resources

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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.
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During photosynthesis, plants acquire the necessary carbon dioxide and release the produced oxygen back into the atmosphere. Openings in the epidermis of plant leaves is the site of this exchange of gasses. A single opening is called a stoma—derived from the Greek word for “mouth.” Stomata open and close in response to a variety of environmental cues.
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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...
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Nitrogen is a very important element for life because it is a major constituent of proteins and nucleic acids. It is a macronutrient, and in nature, it is recycled from organic compounds and stored in the form of  ammonia, ammonium ions, nitrate, nitrite, or  nitrogen gas by many metabolic processes. Many of these metabolic processes are carried out only by prokaryotes.
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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
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Nitrogen is an essential element in biological systems, forming a crucial component of proteins, nucleic acids, and other cellular constituents. Many bacteria and archaea acquire nitrogen in the form of nitrate (NO₃⁻) or ammonia (NH₃), which are then assimilated into biomolecules through specific enzymatic pathways.Assimilatory Nitrate ReductionWhen nitrate enters the cell, it undergoes a two-step reduction process known as assimilatory nitrate reduction. Initially, the enzyme...
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Optimization and Utilization of Agrobacterium-mediated Transient Protein Production in Nicotiana
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在植物酸盐吸收中的切换开关.

Grégory Vert1, Joanne Chory

  • 1BPMP, CNRS UMR 5004, 34060 Montpellier Cedex 1, France. gregory.vert@supagro.inra.fr

Cell
|September 22, 2009
PubMed
概括
此摘要是机器生成的。

植物根通过CHL1载体感知土壤酸盐水平. 这种载体的酸化使植物能够根据土壤度有效地管理酸盐的吸收.

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Measuring Fluxes of Mineral Nutrients and Toxicants in Plants with Radioactive Tracers
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Lateral Root Inducible System in Arabidopsis and Maize
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科学领域:

  • 植物生物学 植物生物学
  • 分子植物生理学分子植物生理学
  • 营养物质运输 营养物质运输

背景情况:

  • 酸盐的吸收对植物生长至关重要,并由根运输体调节.
  • 了解这些调节机制是提高作物营养和产量的关键.

研究的目的:

  • 研究CHL1酸盐载体酸化在植物酸盐传感中的作用.
  • 阐明植物如何在分子水平上对不同土壤酸盐度做出反应.

主要方法:

  • 对CHL1载体的酸化试验.
  • 对不同酸盐水平的植物根反应的分析.

主要成果:

  • 化CHL1酸盐载体被证明是一个关键的调节步骤.
  • 这种酸化事件使植物根能够分化并对不同的土壤酸盐度做出反应.

结论:

  • CHL1的酸化是植物根中酸盐感应的一个关键机制.
  • 这一发现为管理植物营养素吸收的复杂监管网络提供了洞察力.