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Fluorescence and Phosphorescence: Instrumentation01:25

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Fluorometers and spectrofluorometers are two types of instruments used for measuring molecular fluorescence. These instruments differ in how they select excitation and emission wavelengths and the type of light sources they utilize. Fluorometers use absorption interference filters to choose excitation and emission wavelengths. The excitation source in a fluorometer is typically a low-pressure mercury vapor lamp that emits intense lines distributed throughout the ultraviolet and visible regions.
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Updated: Jun 28, 2025

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Imaging Spatial and Temporal Variation in Photosynthesis Using Chlorophyll Fluorescence.

Tracy Lawson1, Silvere Vialet-Chabrand2

  • 1School of Life Sciences, University of Essex, Colchester, UK. tlawson@essex.ac.uk.

Methods in Molecular Biology (Clifton, N.J.)
|April 22, 2024
PubMed
Summary

Chlorophyll fluorescence imaging offers a quick, noninvasive method to evaluate plant health. This study presents example routines for standard measurements, addressing a lack of established protocols.

Keywords:
Chlorophyll fluorescenceImagingNon-photochemical quenchingPhenotypic screeningPhotochemical quenchingPhotosynthetic efficiencyPlant stressSpatial and temporal resolution

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Area of Science:

  • Plant Physiology
  • Biophotonics
  • Agricultural Science

Background:

  • Assessing plant physiological status is crucial for agriculture and ecological studies.
  • Noninvasive techniques are preferred for rapid, repeated measurements.
  • Chlorophyll fluorescence is a sensitive indicator of photosynthetic efficiency.

Purpose of the Study:

  • To provide example routines for chlorophyll fluorescence imaging.
  • To address the lack of standardized protocols in the field.
  • To facilitate the adoption of chlorophyll fluorescence imaging for plant assessment.

Main Methods:

  • Utilizing chlorophyll fluorescence imaging systems.
  • Developing and demonstrating routines for typical fluorescence measurements.
  • Focusing on simultaneous assessment of multiple leaves or plants.

Main Results:

  • Demonstrated feasibility of chlorophyll fluorescence imaging for plant assessment.
  • Provided practical examples of measurement protocols.
  • Highlighted the noninvasive and rapid nature of the technique.

Conclusions:

  • Chlorophyll fluorescence imaging is a valuable tool for rapid physiological screening.
  • Standardized protocols would enhance the utility of this technique.
  • The provided routines serve as a starting point for researchers.