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Optothermal transient emission radiometry for studying the changes in epidermal hydration induced during ripening of tomato fruit mutants

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Abstract

Optothermal transient emission radiometry (OTTER) was used to determine the mean surface hydration and the hydration profile of three mutants (beefsteak, slicing and salad) of harvested tomatoes (Lycopersicon esculentum) that were kept under ambient conditions for as long as 51 days. Maximal sensitivity of OTTER to water in the samples was achieved by using 2.94 μm and 13.1 μm as excitation and emission wavelengths, respectively. The surface hydration increases rapidly and reaches a constant level during the remaining period. The hydrolysis of pectic substances that occur in tomatoes while ripening might be a possible cause for the observed change in hydration.

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Authors and Affiliations

  1. School of EEIE, South Bank University, 103 Borough Road, London, SE1 0AA, UK

    X. Guo, R. Imhof & P. Xiao

  2. Laser Laboratory for Photothermal Science, Department of Agrotechnology and Food Sciences, Biophysics Division, Wageningen University and Research Centre, Dreijenlaan 3, 6703, HA, Wageningen, The Netherlands

    D. Bicanic

  3. Department of Human Nutrition and Food Chemistry, Faculty of Biotechnology and Food Technology, Zagreb University, Pierotijeva 6, Zagreb, Croatia

    D. Bicanic

  4. Horticultural Production Chain Division, Department of Plant Sciences, Wageningen University and Research Centre, Marijkeweg 22, 6704, PG, Wageningen, The Netherlands

    J. Harbinson

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  1. X. Guo
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  2. D. Bicanic
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  3. R. Imhof
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  4. P. Xiao
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  5. J. Harbinson
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Correspondence to D. Bicanic.

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PACS

81.70.Cr; 39.30.+w; 87.14.-g; 78.47.+p

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Guo, X., Bicanic, D., Imhof, R. et al. Optothermal transient emission radiometry for studying the changes in epidermal hydration induced during ripening of tomato fruit mutants. Appl Phys B 79, 793–797 (2004). https://doi.org/10.1007/s00340-004-1627-y

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  • DOI: https://doi.org/10.1007/s00340-004-1627-y

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