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Related Experiment Video

Updated: Oct 6, 2025

A Rapid Laser Probing Method Facilitates the Non-invasive and Contact-free Determination of Leaf Thermal Properties

A Rapid Laser Probing Method Facilitates the Non-invasive and Contact-free Determination of Leaf Thermal Properties

Published on: January 7, 2017

Ultraviolet radiation causes leaf warming due to partial stomatal closure.

Tom B Williams¹, Ian C Dodd¹, Wagdy Y Sobeih²

¹Lancaster Environment Centre, Lancaster University, Lancaster LA1 4YQ, UK.

Horticulture Research

|January 19, 2022

Summary

Ultraviolet radiation exposure causes plants to partially close their stomata, leading to significant increases in leaf temperature. This plant response, observed in tomato plants, has implications for crop production.

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Identification of Novel Regulators of Plant Transpiration by Large-Scale Thermal Imaging Screening in Helianthus Annuus

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Published on: January 30, 2020

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Last Updated: Oct 6, 2025

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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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Identification of Novel Regulators of Plant Transpiration by Large-Scale Thermal Imaging Screening in Helianthus Annuus

Identification of Novel Regulators of Plant Transpiration by Large-Scale Thermal Imaging Screening in Helianthus Annuus

Published on: January 30, 2020

Area of Science:

Plant physiology
Environmental science
Horticulture

Background:

Solar ultraviolet radiation (UVR) influences plant development and physiology.
Plant responses to UVR range from cellular to whole-plant levels.

Purpose of the Study:

To investigate the effect of ultraviolet radiation exposure on plant leaf temperature.
To determine the role of stomatal closure in UVR-induced leaf temperature changes.

Main Methods:

Field experiments with UVR-attenuating filters.
Controlled environment experiments using fluorescent lamps for UVR treatment.
Measurement of stomatal conductance and leaf temperature.

Main Results:

UVR exposure significantly decreased stomatal conductance and increased leaf temperature by up to 1.5°C in tomato plants.
Leaf warming due to decreased stomatal conductance was observed across different experimental setups.
The observed leaf warming was independent of direct UVR warming effects.

Conclusions:

Partial stomatal closure induced by UVR exposure is a key factor in significant leaf warming.
UVR-induced leaf warming has potential implications for horticultural crop production.
Understanding this response is crucial for broader plant science research on UVR effects.