High temperatures promote the uptake of hydrophobic pollutants by <i>Cucurbita pepo via</i> altered gene expression levels of major latex-like proteins

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  • Inui Hideyuki
    Biosignal Research Center, Kobe University Graduate School of Agricultural Science, Kobe University
  • Katte Nonoka
    Faculty of Agriculture, Kobe University
  • Goto Junya
    Graduate School of Agricultural Science, Kobe University
  • Iwabuchi Aya
    Graduate School of Agricultural Science, Kobe University

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  • High temperatures promote the uptake of hydrophobic pollutants by Cucurbita pepo via altered gene expression levels of major latex-like proteins

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Abstract

<p>Cucurbitaceae family members are accumulators of hydrophobic pollutants. Such pollutants have been detected in cucurbits at levels above the maximum residue limit. Since major latex-like proteins (MLPs) are involved in hydrophobic pollutant uptake, changes in MLP expression can increase or decrease contamination. MLP expression levels were altered in the roots of Cucurbita pepo ‘Magda,’ and MLP-PG1 was detected in the xylem sap of Magda when cultivated at a high temperature (35°C). Day length also influenced MLP expression levels but only induced minor changes in the amount of MLPs. The concentration of pyrene, a hydrophobic pollutant, significantly increased with increasing MLP levels in the xylem sap of Magda when cultivated at 35°C. Thus, high temperatures promote the pollution of cucurbits by hydrophobic pollutants. These results can be used to develop novel techniques to reduce crop contamination and establish efficient phytoremediation.</p>

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