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Detection of nickel-induced stress using laser-induced fluorescence signatures from leaves of wheat seedlings / K.B. Mishra in International Journal of Remote Sensing IJRS, vol 29 n°1-2 (January 2008)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 29 n°1-2 (January 2008) . - pp 157 - 173 Titre : Detection of nickel-induced stress using laser-induced fluorescence signatures from leaves of wheat seedlings Type de document : Article/Communication Auteurs : K.B. Mishra, Auteur ; R. Gopal, Auteur Année de publication : 2008 Article en page(s) : pp 157 - 173 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] blé (céréale) [Termes IGN] fluorescence [Termes IGN] impact sur l'environnement [Termes IGN] ion [Termes IGN] métal [Termes IGN] nickel [Termes IGN] pollution atmosphérique [Termes IGN] Vegetation Health Index Résumé : (Auteur) The continuous increase of heavy metal ions in the environment is imposing serious problems in agricultural yield and increases human health threats through accumulation in the food chain. Various studies have shown that heavy metals influence the metabolic processes and pigment concentrations in leaves, and thus affect the laser induced fluorescence (LIF) spectra. Leaf level in vivo LIF spectra using the 488 nm and 355 nm laser lines, fluorescence induction kinetics (FIK) using the 488 nm laser line, and photosynthetic pigments of the control and nickel treated wheat seedlings were measured. The peak parameters of the blue and UV-excited spectral bands were calculated by Gaussian curve fitting. The FIK measured at both the chlorophyll (Chl) fluorescence bands was used to evaluate the fluorescence decrease ratio (R Fd). The variations in RFd and fluorescence ratios of intensities, bandwidth and band area, with varying concentrations of nickel, were revealed as promising parameters in determining the health status of wheat seedlings. These leaf level findings can be extended at canopy level in the field using laser based light detection and ranging (LIDAR) systems. Copyright Taylor & Francis Numéro de notice : A2008-010 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431160701280975 En ligne : https://doi.org/10.1080/01431160701280975 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29005 [article]

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