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相关概念视频

Adaptations that Reduce Water Loss01:57

Adaptations that Reduce Water Loss

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Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
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Aquaporins01:25

Aquaporins

4.9K
Aquaporins or AQPs are a family of integral membrane proteins whose primary function is to transport water, while some called aquaglyceroporins also transport glycerol. In addition, aquaporins have also been suspected to be involved in transporting volatile substances, such as carbon dioxide and ammonia, across membranes. Such AQPs that act as gas channels are often highly expressed in cells involved in the gaseous exchange, such as red blood cells, epithelial cells, and pulmonary capillaries.
4.9K
Responses to Drought and Flooding02:41

Responses to Drought and Flooding

10.7K
Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.
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Regulation of Transpiration by Stomata02:04

Regulation of Transpiration by Stomata

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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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Xylem and Transpiration-driven Transport of Resources02:03

Xylem and Transpiration-driven Transport of Resources

24.0K
The xylem of vascular plants distributes water and dissolved minerals that are taken up by the roots to the rest of the plant. The cells that transport xylem sap are dead upon maturity, and the movement of xylem sap is a passive process.
24.0K
Tonicity in Plants00:53

Tonicity in Plants

53.6K
Tonicity describes the capacity of a cell to lose or gain water. It depends on the quantity of solute that does not penetrate the membrane. Tonicity delimits the magnitude and direction of osmosis and results in three possible scenarios that alter the volume of a cell: hypertonicity, hypotonicity, and isotonicity. Due to differences in structure and physiology, tonicity of plant cells is different from that of animal cells in some scenarios.
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相关实验视频

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Measuring the Osmotic Water Permeability Coefficient Pf of Spherical Cells: Isolated Plant Protoplasts as an Example
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在叶子水潜力的变化期间探索水素素的功能.

Caitlin S Byrt1, Rose Y Zhang1, Isobel Magrath1

  • 1Division of Plant Sciences, Research School of Biology, College of Science, Australian National University, Acton, ACT, Australia.

Frontiers in plant science
|August 24, 2023
PubMed
概括

水素调节植物叶子中的水流动,影响生产力至关重要的湿度. 了解它们复杂的监管是改善作物用水和粮食安全的关键.

关键词:
补充水分 补充水分 补充水分液压系统 液压系统膜运输是一种膜运输.溶解物流的流量是如何发生的水道水道水道的水道.

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Measurement of Leaf Hydraulic Conductance and Stomatal Conductance and Their Responses to Irradiance and Dehydration Using the Evaporative Flux Method EFM
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The Infiltration-centrifugation Technique for Extraction of Apoplastic Fluid from Plant Leaves Using Phaseolus vulgaris as an Example
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相关实验视频

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科学领域:

  • 植物生理学 植物生理学
  • 分子生物学分子生物学
  • 生物物理学的生物物理.

背景情况:

  • 最佳的叶子组织湿度对于植物的生产力和粮食安全至关重要.
  • 叶子的湿度取决于水的可用性,透气和细胞膜的水流.
  • 水蛋白质有助于水和溶解物通过植物细胞膜的运输.

研究的目的:

  • 审查当前对水素素在调节叶子湿度中的作用的理解.
  • 确定研究叶子细胞中的水素调节和功能的挑战.
  • 建议未来的研究方向,以评估水素对叶子底体腔湿度的影响.

主要方法:

  • 关于水和植物水关系的最新科学文献的综述.
  • 对水素素功能的调节机制的分析 (丰度,定位,PTM,相互作用).
  • 讨论在不同水的可用性下解决叶子细胞中的水素动态的挑战.

主要成果:

  • 水素是通过植物细胞膜的水流的关键调节剂.
  • 多种调节机制控制着水素的活性,影响溶液和水的运动.
  • 由于动态调节,解决水素对叶子湿度的特定贡献是复杂的.

结论:

  • 水素对于保持叶子湿度和植物水平衡至关重要.
  • 需要进行进一步的研究,以阐明在叶子细胞中特定的水素素的确切作用和调节.
  • 了解水素的功能对于提高植物用水效率和作物产量至关重要.