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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.

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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.

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Mechanistic Models: Compartment Models in Individual and Population Analysis

Mechanistic models are utilized in individual analysis using single-source data, but imperfections arise due to data collection errors, preventing perfect prediction of observed data. The mathematical equation involves known values (Xi), observed concentrations (Ci), measurement errors (εi), model parameters (ϕj), and the related function (ƒi) for i number of values. Different least-squares metrics quantify differences between predicted and observed values. The ordinary least...

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Related Experiment Video

Updated: Sep 1, 2025

Author Spotlight: Advancing Stomatal Research with Automated Aperture Measurement

Author Spotlight: Advancing Stomatal Research with Automated Aperture Measurement

Published on: February 9, 2024

Quantitative System Modeling Bridges the Gap between Macro- and Microscopic Stomatal Model.

Mengmeng Rui¹, Yi Jing², Hangjin Jiang³

¹Institute of Crop Science, College of Agriculture and Biotechnology, Zijingang Campus, Zhejiang University, Hangzhou, 310058, P. R. China.

Advanced Biology

|August 12, 2022

Summary

Understanding stomatal function is key to plant carbon and water cycles. A new systems model, OnGuard, links guard cell ion homeostasis to stomatal movement, aiding climate change adaptation and breeding for improved plant water use efficiency.

Keywords:

guard cells homeostasis membrane transporters stomatal models system modeling

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Last Updated: Sep 1, 2025

Author Spotlight: Advancing Stomatal Research with Automated Aperture Measurement

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Relating Stomatal Conductance to Leaf Functional Traits

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Published on: October 12, 2015

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An Induction System for Clustered Stomata by Sugar Solution Immersion Treatment in Arabidopsis thaliana Seedlings

Published on: February 15, 2019

Area of Science:

Plant Physiology
Computational Biology
Ecology

Background:

Stomatal function is crucial for plant water and carbon cycles, influencing climate change responses.
Existing stomatal models often lack integrated biological detail or quantitative dynamics, creating a divide between microscopic and macroscopic scales.

Approach:

Quantitative systems analysis was employed to bridge the gap between molecular and physiological scales.
A novel systems model, OnGuard, was developed to investigate guard cell ion homeostasis and its role in dynamic stomatal movements.

Key Points:

The OnGuard model provides a quantitative framework for understanding stomatal dynamics.
The model has generated testable predictions for molecular physiological studies.
It demonstrates potential for "Breeding by Design" to enhance plant carbon-water use efficiency.

Conclusions:

Systems modeling offers a powerful in silico approach to link gene function with macroscopic plant traits.
Future stomatal models can guide agricultural and ecological applications for improved crop performance and ecosystem understanding.