相关概念视频
02:02Phloem and Sugar Transport
37.3K
Like many living organisms, plants have tissues that specialize in specific plant functions. For example, shoots are well adapted to rapid growth, while roots are structured to acquire resources efficiently. However, sugar production is primarily restricted to the photosynthetic cells that reside in the leaves of angiosperm plants. Sugar and other resources are transported from photosynthetic tissues to other specialized tissues by a process called translocation.
37.3K
02:34Water and Mineral Acquisition
33.0K
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.
33.0K
01:46The Apoplast and Symplast
50.4K
Plant growth depends on its ability to take up water and dissolved minerals from the soil. The root system of every plant is equipped with the necessary tissues to facilitate the entry of water and solutes. The plant tissues involved in the transport of water and minerals have two major compartments - the apoplast and the symplast. The apoplast includes everything outside the plasma membrane of living cells and consists of cell walls, extracellular spaces, xylem, phloem, and tracheids. The...
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02:04Regulation of Transpiration by Stomata
28.3K
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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02:03Xylem and Transpiration-driven Transport of Resources
23.9K
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.
23.9K
02:12Short-distance Transport of Resources
16.0K
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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相关实验视频
Updated: Jul 1, 2025
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Lateral Root Inducible System in Arabidopsis and Maize
Published on: January 14, 2016
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控制浮膜卸载和根部发育的控制.
Zixuan Liu1, Raili Ruonala1, Ykä Helariutta1
1Organismal and Evolutionary Biology Research Programme, Faculty of Biology and Environmental Sciences, University of Helsinki, Helsinki, Finland.
Journal of plant physiology
|March 1, 2024
概括
植物根需要平衡的碳分配. 根尖的浮膜卸载受质体调节,控制生长和发育的糖分发,为生物质增强提供了潜力.
科学领域:
- 植物生理学 植物生理学
- 分子生物学分子生物学
- 植物开发 植物开发
背景情况:
- 碳分源和碳汇之间对植物生长至关重要.
- 浮膜卸载向正在发育的组织提供光合作用,特别是根髓系统.
- 质体质体介导着对称质体的运输,是体卸载的关键调节者.
研究的目的:
- 阐明植物根中的花卸载机制.
- 为了识别浮膜卸载的遗传调节者.
- 了解等离子体的动态如何影响碳分配.
主要方法:
- 分析根尖中的共性通路.
- 鉴定参与等离子体调节的基因.
- 调查焦糖的周转和膜脂质组成效应.
主要成果:
- 在根尖的浮膜卸载主要是通过plasmodesmata通过symplastic发生.
- 特定的基因调节了等离子体的开口和透性.
- 和脂质组成调节等离子体,用于自适应性卸载.
结论:
