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Updated: May 23, 2025

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

干旱期间的最小叶子导电性:揭示其变异性和对植物生存的影响

Régis Burlett¹, Santiago Trueba^1,2, Xavier Paul Bouteiller¹

¹INRAE, UMR BIOGECO, Université de Bordeaux, Pessac, 33615, France.

The New phytologist

|March 10, 2025

概括

门口关闭后的叶子水损失对于了解干旱对植物的影响至关重要. 在脱水过程中精确量化最小叶子导电量 (gmin) 可以改善干旱引起的植物死亡模型.

科学领域:

植物生理学植物生理学
干旱压力生态学干旱压力生态学
工厂液压系统工厂液压系统

背景情况:

在干旱影响评估中,封闭后的叶子水损失对干旱影响评估至关重要.
对于植物死亡模型,需要精确量化水损失.

研究的目的:

量化了在九种木质木种物种脱水期间的叶子水损失.
在各种水电位值下计算最小叶子电导率 (gmin).
评估gmin估计对时间对液压故障 (THF) 预测的影响.

主要方法:

九种木质树苗种的脱落的叶子被脱水.
在脱水过程中连续测量水损失.
在生理功能丧失阶段计算了最小叶导电量 (gmin).
一个机械模型评估了gmin估计对THF的影响.

主要成果:

剩余的叶子电导率不是恒定的;在脱水过程中,它在持续和可变地减少.
不同的gmin估计显著影响了THF预测,特别是在抗旱物种中.
在分析中考虑了叶子收缩和蒸汽压力逆差转移.

结论:

在脱水过程中,残留电导率显著变化,因此需要使用生理或水状态边界进行估计.
清晰的gmin值对于准确的THF预测至关重要.
介绍了估计gmin的开源方法,以增强干旱死亡率模型.

关键词:

特殊的行为行为.干旱造成的压力是干旱.相对含水量相对含水量.牙关闭器的关闭方式图尔戈尔的损失点是水的潜力是水的潜力.

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Relating Stomatal Conductance to Leaf Functional Traits

Relating Stomatal Conductance to Leaf Functional Traits

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Kinematic Analysis of Cell Division and Expansion: Quantifying the Cellular Basis of Growth and Sampling Developmental Zones in Zea mays Leaves

Kinematic Analysis of Cell Division and Expansion: Quantifying the Cellular Basis of Growth and Sampling Developmental Zones in Zea mays Leaves

Published on: December 2, 2016

相关概念视频

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.

Responses to Drought and Flooding

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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.

Responses to Heat and Cold Stress

Responses to Heat and Cold Stress

Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.

Responses to Salt Stress

Responses to Salt Stress

Salt stress—which can be triggered by high salt concentrations in a plant’s environment—can significantly affect plant growth and crop production by influencing photosynthesis and the absorption of water and nutrients.

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.

Light Acquisition

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.