Prime

Type your tag names separated by a space and hit enter

Dualex: a new instrument for field measurements of epidermal ultraviolet absorbance by chlorophyll fluorescence.

Abstract

Dualex (dual excitation) is a field-portable instrument, hereby described, for the assessment of polyphenolic compounds in leaves from the measurement of UV absorbance of the leaf epidermis by double excitation of chlorophyll fluorescence. The instrument takes advantage of a feedback loop that equalizes the fluorescence level induced by a reference red light to the UV-light-induced fluorescence level. This allows quick measurement from attached leaves even under field conditions. The use of light-emitting diodes and of a leaf-clip configuration makes Dualex a user-friendly instrument with potential applications in ecophysiological research, light climate analysis, agriculture, forestry, horticulture, pest management, selection of medicinal plants, and wherever accumulation of leaf polyphenolics is involved in plant responses to the environment.

Links

  • Publisher Full Text
  • Authors

    , , ,

    Source

    Applied optics 43:23 2004 Aug 10 pg 4488-96

    MeSH

    Chlorophyll
    Environmental Monitoring
    Equipment Design
    Equipment Failure Analysis
    Flavonoids
    Miniaturization
    Phenols
    Plant Epidermis
    Plant Leaves
    Polyphenols
    Reproducibility of Results
    Sensitivity and Specificity
    Spectrometry, Fluorescence
    Spectrophotometry, Ultraviolet
    Ultraviolet Rays

    Pub Type(s)

    Comparative Study
    Evaluation Studies
    Journal Article
    Research Support, Non-U.S. Gov't
    Validation Studies

    Language

    eng

    PubMed ID

    15382317

    Citation

    TY - JOUR T1 - Dualex: a new instrument for field measurements of epidermal ultraviolet absorbance by chlorophyll fluorescence. AU - Goulas,Yves, AU - Cerovic,Zoran G, AU - Cartelat,Aurélie, AU - Moya,Ismaël, PY - 2004/9/24/pubmed PY - 2004/10/29/medline PY - 2004/9/24/entrez SP - 4488 EP - 96 JF - Applied optics JO - Appl Opt VL - 43 IS - 23 N2 - Dualex (dual excitation) is a field-portable instrument, hereby described, for the assessment of polyphenolic compounds in leaves from the measurement of UV absorbance of the leaf epidermis by double excitation of chlorophyll fluorescence. The instrument takes advantage of a feedback loop that equalizes the fluorescence level induced by a reference red light to the UV-light-induced fluorescence level. This allows quick measurement from attached leaves even under field conditions. The use of light-emitting diodes and of a leaf-clip configuration makes Dualex a user-friendly instrument with potential applications in ecophysiological research, light climate analysis, agriculture, forestry, horticulture, pest management, selection of medicinal plants, and wherever accumulation of leaf polyphenolics is involved in plant responses to the environment. SN - 0003-6935 UR - https://www.unboundmedicine.com/medline/citation/15382317/Dualex:_a_new_instrument_for_field_measurements_of_epidermal_ultraviolet_absorbance_by_chlorophyll_fluorescence_ L2 - http://www.opticsinfobase.org/abstract.cfm?URI=ao-43-23-4488 ER -