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[Mesophyll conductance to CO2: Methods and current knowledge].

Xiao-Ying Gong1, Wei-Ting Ma1, Yong-Zhi Yu1

  • 1College of Geographical Sciences, Fujian Normal University/Breeding Base of Key Laboratory for Subtropical Mountain Ecology, Fuzhou 350007, China.

Ying Yong Sheng Tai Xue Bao = the Journal of Applied Ecology
|September 8, 2021
PubMed
Summary
This summary is machine-generated.

This review details the online 13C discrimination method for measuring mesophyll conductance (gm) in C3 plants. It highlights gm

Keywords:
photosynthesis|mesophyll conductance|carbon isotopes|chlorophyll fluorescence|isotope ratio mass spectrometry|photosynthetic gas exchange

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Area of Science:

  • Plant Physiology
  • Photosynthesis Research
  • Eco-physiology

Background:

  • Mesophyll conductance (gm) is crucial for photosynthesis and crop efficiency.
  • Accurate gm measurement is vital for understanding plant responses.
  • Existing methods for gm assessment present challenges.

Purpose of the Study:

  • To review commonly used methods for measuring mesophyll conductance (gm).
  • To introduce the theory and application of the online 13C discrimination method for gm.
  • To discuss factors influencing gm variation and future research directions.

Main Methods:

  • Review of existing mesophyll conductance measurement techniques.
  • Detailed explanation of the online 13C discrimination method, including Farquhar's model.
  • Systematic introduction to measurement protocols, equations, and required facilities.

Main Results:

  • The online 13C discrimination method offers a robust approach for gm measurement in C3 plants.
  • Identified key drivers affecting variations in mesophyll conductance.
  • Provided a comprehensive overview of the method's theoretical basis and practical implementation.

Conclusions:

  • The online 13C discrimination method is a valuable tool for plant eco-physiological studies.
  • Further development of methodology and experimental protocols can enhance its application.
  • Improved gm measurement can contribute to enhancing crop photosynthetic efficiency.