emission from foliage was observed at HT. HT elevated the concentrations of monoterpenes and sesquiterpenes
(E)--farnesene and -caryophyllene, in roots of both cultivars. The concentration of total phenolics in foliage was not affected by HT as
expected by a protein competition model of phenolic allocation. However, the proportion of the single phenylpropanoid compound, methyl
isoeugenol,was reduced byHT.HT increased the concentration of total soluble proteins in cv Parano, whereas in cv Splendid the concentrations
of chlorophyll and carotenoids decreased. The dry mass of main root was significantly reduced at HT in both cultivars, probably reflecting
reduced photosynthesis and carbon allocation costs to defence as a result of thermal stress. Limonene treatment was not sufficient to protect
carrot root growth from thermal stress.
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