Lateral root emission contributes to the mechanism of drought escape in Catetão. Catetão increased the root number at 60-90° angle under drought stress. Membrane integrity was less compromised during drought stress in Catetão. Ratio of deep rooting can be used to select tolerant genotypes to the drought stress.

Th e cultivation of aromatic species to obtain essential oils has great economic importance, presenting an increasing demand from different industrial sectors, especially to menthol mint (Mentha arvensis L.) essential oil, rich in menthol (70-80%). Consortium cultivation has been an important practice in agricultural systems whose land use is necessary, consequently promoting strong competition for light in reduced space. Thus, this study aimed verifying if different light intensities might promote chemical, metabolical and anatomical alterations in menthol mint. Plants were grown in greenhouse at different average of light intensities (137, 254, 406 and 543 µmol photons m -2 s -1 ). Samples were collected 43 days after germination and submitted to following analyses: Gravimetric test, photosynthetic pigments, soluble fractions, enzymatic activity, N-total, trichome density and histochemistry and chemometric test based on essential oil chemical profi le. Fresh mass gain, trichome density, essential oil content and soluble sugars were positively infl uenced by light intensity increase. On the other hand, total-N, NO 3 − -N and pigments content have decreased infl uenced by light intensity increase. In the secretion from the trichomes, phenolic substances were reported, as well as lipophilic ones in the peltate ones. The increase of oxygenated monoterpenes was favored by light intensity decrease.

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