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Salinity-Induced Changes of Multiparametric Fluorescence Indices of Tomato Leaves

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  • Burkard Kautz

    ()
    (Institute of Crop Science and Resource Conservation—Horticultural Science, University of Bonn, Auf dem Hügel 6, 53121 Bonn, Germany)

  • Mauricio Hunsche

    ()
    (Institute of Crop Science and Resource Conservation—Horticultural Science, University of Bonn, Auf dem Hügel 6, 53121 Bonn, Germany)

  • Georg Noga

    ()
    (Institute of Crop Science and Resource Conservation—Horticultural Science, University of Bonn, Auf dem Hügel 6, 53121 Bonn, Germany)

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    Abstract

    The aim of our study was to identify appropriate multiparametric fluorescence ratios to evaluate the response of tomato ( Solanum lycopersicum ) genotypes to salinity. In this context, we hypothesized that the fluorescence indices BFRR_UV, FLAV, NBI and SFR provided by the multiparametric fluorescence technique reveal the impact of salinity on tomato leaves. For this purpose, the tomato genotypes H-2274, Harzfeuer and Rio Grande were grown in the greenhouse under standard or saline conditions. As reference measurements, we recorded the maximum photochemical efficiency of photosystem II (Fv/Fm) via pulse-amplitude-modulated (PAM) chlorophyll fluorescence (ChlF) and analyzed the concentrations of sodium (Na), potassium (K), magnesium (Mg), proline and chlorophyll (Chl). In general, “Harzfeuer” showed a more pronounced response to salinity, as revealed by the increase in Na and proline as well as the decrease in K concentration. Significant differences between the control and the salt treatment were also assessed with Fv/Fm. The ratios BFRR_UV, FLAV, SFR_G and NBI_G increased significantly in the salinity-exposed plants. These ratios, compared with Fv/Fm, also provide precise but more rapid information about the impact of salinity on tomato leaves. On this basis, we demonstrate that the multiparametric fluorescence indices provide a valuable, rapid and practical tool for the in situ monitoring of the physiological status of plants exposed to salinity.

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    Bibliographic Info

    Article provided by MDPI, Open Access Journal in its journal Agriculture.

    Volume (Year): 4 (2014)
    Issue (Month): 2 (April)
    Pages: 132-146

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    Handle: RePEc:gam:jagris:v:4:y:2014:i:2:p:132-146:d:35669

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    Related research

    Keywords: abiotic stress; pigment fluorescence; NaCl; physiological responses; salinity; Solanum lycopersicum;

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    1. anonymous, 2000. "The brave new world of agriculture," EconSouth, Federal Reserve Bank of Atlanta, Federal Reserve Bank of Atlanta, issue Q3, pages 8-13.
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