Journal
PESQUISA AGROPECUARIA BRASILEIRA
Volume 46, Issue 7, Pages 706-711Publisher
EMPRESA BRASIL PESQ AGROPEC
DOI: 10.1590/S0100-204X2011000700005
Keywords
Lippia sidoides; essential oil; flavonoids; leaf water potential; medicinal plant; water stress
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Funding
- Fundo de Amparo a Pesquisa de Minas Gerais
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico
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The objective of this work was to assess the effect of different periods of water stress before harvest of pepper-rosmarin (Lippia sidoides) on the contents of essential oil and flavonoids. The experiment was carried out during 270 days of cultivation, with drainage lysimeters, in a completely randomized block design with five treatments: 0, 2, 4, 6, and 8 days of water suppression before harvest, with four replicates. Fresh and dry matter yield, essential oil content, total flavonoids content, and water potential and temperature of leaves were determined. There was a decrease of approximately 50% in oil content and of 60% in total flavonoid content with the reduction of leaf water potential in 0.3 MPa. Essential oil is more sensitive to water stress than total flavonoids.
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