Crescimento, teor de óleo essencial e conteúdo de cumarina de plantas jovens de guaco (Mikania glomerata Sprengel) cultivadas sob malhas coloridas

Abstract

Growth, essential oil content, and content of coumarin in young plants of guaco (Mikania glomerata Sprengel) cultivated under colored nets. Mikania glomerata Sprengel is a medicinal plant widely used in folk medicine, mainly to treat respiratory disorders, which acts by dilating the bronchi, being coumarin one of the

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its responses to the environmental conditions is necessary to improve the cultivation methods. In this context, the aim of this work was to evaluate the effect of light spectrum control on growth, the essential oil content, and the content of coumarin in Mikania glomerata Sprengel. Plants were grown for four months under nets K V

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/ T W 9& ? K the blue fabric allowed an increase in total dry matter accumulation and leaf area, as plants under red shading

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grown under full sun exposure. Changes were not observed, however, in leaf weight ratio and in root/shoot

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increase of 142% over the level found in plants grown under full sun exposure, as the coumarin content was

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obtain desirable morphological characteristics and maximize the production of active principles in this species. Key words: Light intensity