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Updated: May 19, 2026
10:20
Evaluation of Photosynthetic Behaviors by Simultaneous Measurements of Leaf Reflectance and Chlorophyll Fluorescence Analyses
Published on: August 9, 2019
An LED-based fluorometer for chlorophyll quantification in the laboratory and in the field
Jacob J Lamb1, Julian J Eaton-Rye, Martin F Hohmann-Marriott
1Department of Biochemistry, University of Otago, Dunedin, New Zealand.
Photosynthesis Research
|September 1, 2012
Summary
This study introduces a new method using chlorophyll fluorescence to measure total chlorophyll a and b concentrations. The developed instrument accurately quantifies chlorophyll in various plant samples, even at low concentrations.
Area of Science:
- Agronomy
- Plant Biology
- Spectroscopy
Background:
- Chlorophyll content is a critical parameter in plant science.
- Accurate measurement of chlorophyll a and b is essential for research.
Purpose of the Study:
- To explore the feasibility of using chlorophyll fluorescence for determining total chlorophyll concentration.
- To design and validate an instrument for precise chlorophyll measurement.
Main Methods:
- Utilizing chlorophyll fluorescence emission induced by specific excitation wavelengths (457 nm).
- Designing a portable instrument with LEDs and a photodiode for fluorescence detection.
- Employing Monte-Carlo simulations to validate experimental data.
Main Results:
- Excitation at 457 nm yields proportional fluorescence to total molar chlorophyll concentration.
- The developed instrument accurately determines total chlorophyll concentrations.
- Precise chlorophyll determination (<5 nmol/mL) is achievable in carotenoid-containing samples.
Conclusions:
- Chlorophyll fluorescence offers a viable method for total chlorophyll quantification.
- The designed instrument provides a practical tool for measuring chlorophyll a and b concentrations.
- This technique is applicable across diverse organisms with varying chlorophyll ratios.
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