Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Adaptations that Reduce Water Loss01:57

Adaptations that Reduce Water Loss

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.
Photoreceptors and Plant Responses to Light02:00

Photoreceptors and Plant Responses to Light

Light plays a significant role in regulating the growth and development of plants. In addition to providing energy for photosynthesis, light provides other important cues to regulate a range of developmental and physiological responses in plants.
Light Acquisition02:16

Light Acquisition

In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
Responses to Drought and Flooding02:41

Responses to Drought and Flooding

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.
Regulation of Transpiration by Stomata02:04

Regulation of Transpiration by Stomata

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.
Epiphytes, Parasites, and Carnivores02:40

Epiphytes, Parasites, and Carnivores

Plants often form mutualistic relationships with soil-dwelling fungi or bacteria to enhance their roots’ nutrient uptake ability. Root-colonizing fungi (e.g., mycorrhizae) increase a plant’s root surface area, which promotes nutrient absorption. While root-colonizing, nitrogen-fixing bacteria (e.g., rhizobia) convert atmospheric nitrogen (N2) into ammonia (NH3), making nitrogen available to plants for various biological functions. For example, nitrogen is essential for the biosynthesis of the...

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Response of radish to multiple stresses: I. Physiological and growth responses to changes in ozone and nitrogen.

The New phytologist·2021
Same author

POPULATION VARIABILITY OF CERCOCARPUS IN THE WHITE MOUNTAINS OF CALIFORNIA AS RELATED TO HABITAT.

Evolution; international journal of organic evolution·2017
Same author

Growth, photosynthesis and storage of carbohydrates and nitrogen in Phaseolus lunatus in relation to resource availability.

Oecologia·2017
Same author

Maximum rooting depth of vegetation types at the global scale.

Oecologia·2017
Same author

A global analysis of root distributions for terrestrial biomes.

Oecologia·2017
Same author

Rooting depth, water availability, and vegetation cover along an aridity gradient in Patagonia.

Oecologia·2017

相关实验视频

Updated: Jul 12, 2026

Evaluation of Photosynthetic Behaviors by Simultaneous Measurements of Leaf Reflectance and Chlorophyll Fluorescence Analyses
10:20

Evaluation of Photosynthetic Behaviors by Simultaneous Measurements of Leaf Reflectance and Chlorophyll Fluorescence Analyses

Published on: August 9, 2019

叶子青春期:影响沙漠灌木中的吸收率和光合作用.

J Ehleringer, O Björkman, H A Mooney

    Science (New York, N.Y.)
    |April 23, 1976
    PubMed
    概括

    沙漠植物如Encelia farinosa的叶毛显著减少了光合作用过程中的光吸收. 这种适应有助于管理干旱环境中的能量平衡,影响植物的生存和生长.

    科学领域:

    • 植物生理学 植物生理学
    • 生态生态学 生态生态学
    • 植物学 植物学

    背景情况:

    • Encelia farinosa,一个沙漠复合物种家族的物种,表现出叶子的青春期 (毛发).
    • 相关的沿海物种E. californica缺乏显著的青春期.
    • 叶毛可以影响植物对环境条件的反应.

    研究的目的:

    • 量化叶子青春期对E. farinosa.光吸收的影响.
    • 为了比较青春期E. farinosa和非青春期E. californica之间的光吸收率和光合作用率.
    • 为了确定青春期对叶子能量平衡和光合作用效率的影响.

    主要方法:

    • 光合作用活性辐射 (PAR) 吸收率的光谱分析.
    • 对E. farinosa和E. californica进行比较研究.
    • 测量光合作用速率和二氧化碳导电性.

    主要成果:

    • 与E. californica相比,E. farinosa在PAR吸收率下降幅度高达56%以上.
    • 在E. farinosa的青春期随着生长季节的推移而增加.
    • 减少光吸收,而不是改变CO2导电率,是减少光合作用速率的主要原因.

    更多相关视频

    Analysis of Arabidopsis thaliana Growth Behavior in Different Light Qualities
    05:34

    Analysis of Arabidopsis thaliana Growth Behavior in Different Light Qualities

    Published on: February 2, 2018

    Non-invasive Assay for Chlorophyll Biosynthesis Kinetics Determination during Early Stages of Arabidopsis De-etiolation
    07:58

    Non-invasive Assay for Chlorophyll Biosynthesis Kinetics Determination during Early Stages of Arabidopsis De-etiolation

    Published on: January 12, 2024

    相关实验视频

    Last Updated: Jul 12, 2026

    Evaluation of Photosynthetic Behaviors by Simultaneous Measurements of Leaf Reflectance and Chlorophyll Fluorescence Analyses
    10:20

    Evaluation of Photosynthetic Behaviors by Simultaneous Measurements of Leaf Reflectance and Chlorophyll Fluorescence Analyses

    Published on: August 9, 2019

    Analysis of Arabidopsis thaliana Growth Behavior in Different Light Qualities
    05:34

    Analysis of Arabidopsis thaliana Growth Behavior in Different Light Qualities

    Published on: February 2, 2018

    Non-invasive Assay for Chlorophyll Biosynthesis Kinetics Determination during Early Stages of Arabidopsis De-etiolation
    07:58

    Non-invasive Assay for Chlorophyll Biosynthesis Kinetics Determination during Early Stages of Arabidopsis De-etiolation

    Published on: January 12, 2024

    结论:

    • 在E. farinosa的叶子青春期显著降低了光吸收,影响了光合作用率.
    • 青春期在修改叶子能量平衡中起着至关重要的作用,以维持沙漠生存.
    • 这些发现突出了通过形态特征对干旱环境的适应策略.