相关实验视频

Updated: Jul 15, 2025

Xylem Water Distribution in Woody Plants Visualized with a Cryo-scanning Electron Microscope

Xylem Water Distribution in Woody Plants Visualized with a Cryo-scanning Electron Microscope

Published on: June 20, 2019

苏格兰松树的季节性和每日西伦半径变化与影响透气的环境因素密切相关

Walter Oberhuber¹, Andreas Gruber¹, Gerhard Wieser¹

¹Department of Botany, University of Innsbruck, Sternwartestrasse 15, A-6020 Innsbruck, Austria.

|September 28, 2023

概括

苏格兰松树表现出季节性树叶半径变化 (XRV),受温度和水的可用性影响. 每日XRV密切跟踪环境因素,表明一个被动的,透气驱动的液压系统在西门.

科学领域:

植物生理学植物生理学
森林生态森林生态
登德罗年代学登德罗年代学

背景情况:

了解树干半径变化对于评估森林健康和应对气候变化的反应至关重要.
苏格兰松 (Pinus sylvestris) 是欧洲森林的一个关键物种,对干旱压力敏感.

研究的目的:

为了研究苏格兰松树和内皮的季节性和每日半径变化.
为了确定生长季节的树半径变化的环境驱动因素.

主要方法:

使用尖端树计测量了三年来苏格兰松树的树叶半径变化 (Xylem (XRV) 和内皮 (IBV)).
XRV数据与温度和蒸汽压力赤字等环境因素相关联.

主要成果:

在高温和蒸汽压力赤字期间,XRV下降,到秋末恢复.
每日XRV振幅与最大空气温度,太阳辐射和蒸汽压力缺陷有很强的相关性.
XRV和IBV显示出紧密的液压合,XRV在每日循环中先于IBV.

结论:

苏格兰松树的体作为一个被动的液压系统,由透气驱动.
环境因素,特别是温度和水的可用性,显著影响苏格兰松树干动态.

关键词:

苏格兰松树苏格兰松树大气中的水需求大气中的水需求斑点树枝仪是指点的树枝仪.干半径变化干半径变化克西伦半径变化的变化氧浮液压合器液压合器

更多相关视频

The Calibration and Use of Capacitance Sensors to Monitor Stem Water Content in Trees

The Calibration and Use of Capacitance Sensors to Monitor Stem Water Content in Trees

Published on: December 27, 2017

Measurement of Leaf Hydraulic Conductance and Stomatal Conductance and Their Responses to Irradiance and Dehydration Using the Evaporative Flux Method EFM

Measurement of Leaf Hydraulic Conductance and Stomatal Conductance and Their Responses to Irradiance and Dehydration Using the Evaporative Flux Method EFM

Published on: December 31, 2012

相关概念视频

Xylem and Transpiration-driven Transport of Resources

Xylem and Transpiration-driven Transport of Resources

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.

Regulation of Transpiration by Stomata

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.

Adaptations that Reduce Water Loss

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.

Meristems and Plant Growth

Meristems and Plant Growth

Plants grow throughout their lives; this is called indeterminate growth, and it distinguishes plants from most animals. Although certain parts of plants stop growing (e.g., leaves and flowers), others grow continuously—like roots and stems.

Primary and Secondary Growth in Roots and Shoots

Primary and Secondary Growth in Roots and Shoots

Vascular plants, which account for over 90% of the Earth’s vegetation, all undergo primary growth—which lengthens roots and shoots. Many land plants, notably woody plants, also undergo secondary growth—which thickens roots and shoots.

Responses to Drought and Flooding

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.