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Related Concept Videos

Light Acquisition02:16

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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Non-invasive Assay for Chlorophyll Biosynthesis Kinetics Determination during Early Stages of Arabidopsis De-etiolation
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Assessing interannual variation in leaf chlorophyll dynamics using optical and destructive methods with mixed-effects

Ramla Khan1,2

  • 1Health data sciences division, The University of Oxford, Oxford, UK. ramla.khan@ndorms.ox.ac.uk.

Journal of Plant Research
|June 15, 2026
PubMed
Summary

Portable optical meters offer non-destructive leaf chlorophyll assessment, but require calibration. This study calibrated a CCM-300 for field maple, revealing earlier senescence in a warmer, drier year, highlighting environmental impacts on plant physiology.

Keywords:
Acer campestreAcetone extractionChlorophyll fluorescence ratioNon-destructive measurementSeasonal dynamics

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Area of Science:

  • Plant Physiology
  • Ecology
  • Remote Sensing

Background:

  • Accurate leaf chlorophyll assessment is vital for understanding plant responses to environmental changes.
  • Solvent extraction is precise but destructive; portable optical meters offer non-destructive measurements but need calibration.

Purpose of the Study:

  • To evaluate the performance of the CCM-300 portable chlorophyll meter.
  • To reconstruct seasonal chlorophyll dynamics in field maple (Acer campestre).
  • To compare chlorophyll dynamics across two contrasting UK summers.

Main Methods:

  • Paired chlorophyll fluorescence ratio (CFR) and acetone-extracted chlorophyll data were collected in 2023.
  • Calibration models were developed using RF regression and a simple linear model for cross-year projection.
  • CCM-300 data from 2022 were projected using the calibration to create a "virtual acetone" trajectory.

Main Results:

  • Both years showed mid-season chlorophyll plateaus and late-summer declines.
  • Senescence initiated earlier in the warmer, drier 2022 season.
  • Temperature and wind speed positively affected CFR in 2022; mild conditions showed non-linear decline in 2023.

Conclusions:

  • The CCM-300 can track seasonal chlorophyll dynamics, with earlier senescence observed in a warmer, drier year.
  • Cross-year projections provide insights into relative seasonal trajectory shape and timing.
  • Environmental factors significantly influence plant chlorophyll dynamics and senescence timing.