We investigated the effects of application of aqueous solution (50 ml l−1) of limonene spray (LS) on growth, physiology, foliar and root
chemistry and volatile emissions of two carrot cultivars (cv Parano and Splendid) growing at control temperature (CT) of 25 ◦C and at high
temperature (HT) of 35 ◦C. The reduction in net photosynthesis induced by HT tended to be counteracted by LS 2 h and 24 h after the
first spraying in cv Parano, but the long-term effect was not significant. LS counteracted temperature-induced reductions seen in chlorophyll
fluorescence after 21 days from the start of the experiment.