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Updated: Jan 25, 2026

Stomata Tape-Peel: An Improved Method for Guard Cell Sample Preparation
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How do stomata respond to water status?

Thomas N Buckley1

  • 1Department of Plant Sciences, University of California, Davis, One Shields Ave, Davis, CA, 95616, USA.

The New Phytologist
|May 10, 2019
PubMed
Summary

Plant stomata control water loss and photosynthesis. Recent research highlights a

Area of Science:

  • Plant physiology
  • Ecohydrology
  • Biophysics

Background:

  • Stomatal responses to environmental factors are crucial for plant productivity and climate regulation.
  • A comprehensive mechanistic understanding of stomatal water relations is currently lacking.

Purpose of the Study:

  • To review historical and recent advances in understanding stomatal water relations.
  • To identify key areas for future research in stomatal mechanisms.

Main Methods:

  • Literature review of historical and recent research on stomatal responses.
  • Analysis of proposed mechanisms including hydroactive feedback, vapor/heat transport, and hydraulic conductance.

Main Results:

  • Evidence supports a metabolically mediated 'hydroactive feedback' in stomatal responses to drought and evaporative demand, potentially involving abscisic acid.
Keywords:
abscisic acid (ABA)hydroactivehydromechanicalhydropassivestomatal conductancetranspirationwater relations

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  • Hypothetical mechanisms for humidity, light, and temperature responses require further validation.
  • Intra-leaf hydraulic conductance dynamics may influence water status responses.

    • Conclusions:

    • Future research should focus on validating hydroactive feedback, identifying water status sensing sites in leaves, clarifying transport mechanisms, and verifying hydromechanical results.
    • A tractable and reliable mechanistic model of stomatal responses to water status is the ultimate goal.