Infuência do nível de irradiância no crescimento, produção e composição química do óleo essencial de hortelã-do-campo (Hyptis marrubioides Epl.)
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Data
2009-06
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Resumo
In the present work, the level of irradiation of 20, 60 and 100% of natural light on the growth, content
and composition of the essnetial oil of “hortelã do campo” (Hyptis marrubioides) was evaluated.
The experiment was conducted in the completely randomized design with twenty-ve replicates per
treatment. After 132 days of cultivation, plant growth and the content and compositoin of the essntial
oil were investigated. At 100% of irradiation, the plants presented less height as compared with the
shaded treatments. The ratio branch/leaf was higher at the level of irradiation of 20%. It was found that
in the full sunshine, the plants showed lower height as compared with the shaded treatments. The leaf/branch ratio was higher at the lowest level of irradition of 20%. The number of branches and the plant
mass accumulation were greatest at the level of irradition of 100%. The content of essential oil was
not inuenced by the levels of irradiation, but the yield was greater when grown at the level of 100%
of irradiation. The chemical composition of the essential oil of Hyptis marrubioides did not present
any alterations with the different levels of irradiation, except for iso-3-tujanol and δ-cadineno, which
presented highest concentrations in plants grown, respectively at 100 and 60% of irradiation. The major
component of teh essential oil of H. marrubioides, independent of the levels of irradiation was cistujona
oxygenated monoterpene (37.78%), followed by sequiterpenes hiydrocarbonetes (E)-carioleno
(14.93%), α-copaeno (11.03%) and σ-muuroleno (9.60%).
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Hyptis marrubioides, Planta medicinal, Óleo essencial, Medicinal plant, Essential oil
Citação
SALES, Juliana de Fátima et al. Influência do nível de irradiância no crescimento, produção e composição química do óleo essencial de hortelã-do-campo (Hyptis marrubioides Epl.) Semina: ciências agrárias, Londrina, v. 30, n. 2, p. 389-396, abr./jun. 2009.