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    Por favor, use este identificador para citar o enlazar este ítem:https://uvadoc.uva.es/handle/10324/67383

    Título
    Relationships between net photosynthesis and steady-state chlorophyll fluorescence retrieved from airborne hyperspectral imagery
    Autor
    Zarco Tejada, Pablo J.
    Catalina, Álvaro
    González García, María RosaAutoridad UVA Orcid
    Martín Peña, PedroAutoridad UVA Orcid
    Año del Documento
    2013
    Editorial
    Elsevier
    Descripción
    Producción Científica
    Documento Fuente
    Remote Sensing of Environment, Septiembre 2013, vol. 136, p 247-258
    Abstract
    Previous studies have demonstrated the link between leaf chlorophyll fluorescence and photosynthesis, mainly at the leaf level and under controlled laboratory conditions. The present study makes progress in demonstrating the relationship between steady-state fluorescence and net photosynthesis measured under natural light field conditions both at the leaf and image levels. Ground measurements and airborne campaigns were conducted over two summers to acquire hyperspectral imagery at 40cm resolution and 260 spectral bands in the 400-885nm spectral region. This enabled the identification of pure vegetation pixels to extract their radiance spectra. The datasets were collected in August 2010 and 2011 in the western part of the area included in the Ribera del Duero Designation of Origin (Denominación de Origen), in northern Spain. The experiments were conducted in twelve full production vineyards where two study plots per field were selected to ensure adequate variability in leaf biochemistry and physiological condition. The vineyard fields were selected on the basis of their gradient in leaf nutrition and plant water status and showed variability in leaf pigment values and stomatal conductance. Leaves were collected for destructive sampling and biochemical determination of chlorophyll a+b, carotenoids and anthocyanins in the laboratory. Leaf steady-state and dark-adapted fluorescence parameters, net photosynthesis (Pn) and stomatal conductance (Gs) were measured in the field under natural light conditions. Such data were used as a validation dataset to assess fluorescence-photosynthesis relationships both at the leaf and the image level. The Fraunhofer Line Depth (FLD) principle based on three spectral bands (FLD3) was the method used to quantify fluorescence emission from radiance spectra extracted from pure vegetation pixels identified in the hyperspectral imagery. Fluorescence retrievals conducted using the FLD3 method yielded significant results when compared to ground-measured steady-state Fs (r2=0.48; p<0.01) and Fv'/Fm' (r2=0.53; p<0.01). The two-year assessment yielded consistent results on the relationship between Pn and Fs both at the leaf level and based on the airborne hyperspectral imagery. At the leaf level, significant relationships were found between leaf Fs and Pn (r2=0.55; p<0.001 for 2010; r2=0.59; p<0.001 for 2011). At the hyperspectral image level, the agreement between leaf Pn and airborne F was consistent for both years separately, yielding significant relationships at p<0.01 for 2010 (r2=0.54) and 2011 (r2=0.41) and a significant relationship at p<0.001 for the aggregated years (r2=0.52). Results show the link between net photosynthesis and steady-state fluorescence obtained under natural sunlight conditions at both leaf and airborne hyperspectral imagery levels. © 2013 Elsevier Inc.
    Materias Unesco
    3103.01 Producción de Cultivos
    3103.09 Cultivos de Plantas
    Palabras Clave
    Hiperespectral
    Fluorescence
    FLD
    In-filling
    Photosynthesis
    Airborne
    Stress detection
    Unmanned aerial vehicle
    ISSN
    0034-4257
    Revisión por pares
    SI
    DOI
    10.1016/j.rse.2013.05.011
    Patrocinador
    Este trabajo forma parte de un proyecto de investigación detro del PLAN NACIONAL 2008/2011. LIA DE PROYECTOS DE I+D+I.
    Version del Editor
    https://www.sciencedirect.com/science/article/pii/S0034425713001648
    Idioma
    eng
    URI
    https://uvadoc.uva.es/handle/10324/67383
    Tipo de versión
    info:eu-repo/semantics/publishedVersion
    Derechos
    openAccess
    Aparece en las colecciones
    • DEP57 - Artículos de revista [101]
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    Universidad de Valladolid

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