%0 Journal Article %T Elevated Root-Zone Temperature Modulates Growth and Quality of Hydroponically Grown Carrots %A Masaru Sakamoto %A Takahiro Suzuki %J Agricultural Sciences %P 749-757 %@ 2156-8561 %D 2015 %I Scientific Research Publishing %R 10.4236/as.2015.68072 %X Air and soil temperatures strongly influence the growth and quality of crops. However, in root vegetables, such as carrot, few experiments aimed at regulating growth and quality by manipulating root-zone temperature have been reported. We investigated the effect of root-zone temperatures (20&degC, 25&degC, 29&degC, and 33&degC) on carrot growth and components using a hydroponic system. High root-zone temperatures for 14 days reduced shoot and rootgrowth and water content. In contrast, total phenolic compounds and soluble-solid content increased in tap roots under high-temperature treatment. Root oxygen consumption was upregulated after 7 days under high-temperature treatment. These results suggest that high root-zone temperatures induce drought-like stress responses that modulate carrot biomass and components. High root-zone temperature treatments administered to hydroponically grown crops may be a valuable tool for improving and increasing the quality and value of crops. %K Carrot %K Root-Zone Temperature %K Hydroponics %K Phenolic Compounds %K Drought Stress %U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=58611