ABSTRACT
A verificação da capacidade indutora de fitoalexinas a partir de extratos e tinturas de espécies vegetais pode representar uma forma potencial de controle de doenças em plantas cultivadas. O objetivo foi verificar a capacidade de indução de fitoalexinas em cotilédones de Soja e mesocótilos de Sorgo a partir de extratos brutos aquosos (EBAs) e tinturas de espécies medicinais. As espécies utilizadas foram as plantas medicinais Arruda (Ruta graveolens), Manjerona (Origanum majorana) e Carqueja (Baccharis trimera). Os resultados obtidos mostraram que os EBAs são eficientes na indução de fitoalexinas em cotilédones de Soja. Em mesocótilos de Sorgo os EBAs das plantas medicinais Carqueja e Manjerona induzem a produção de fitoalexinas em concentrações elevadas (15, 20, 25 e 50%). As tinturas são capazes de induzir a produção de fitoalexinas em cotilédones de Soja nas concentrações de 10 e 15%, porém, não são capazes de induzir acúmulo de fitoalexinas em mesocótilos de Sorgo.
The verification of the capacity to induce phytoalexins from the biological activity of plant species may represent a potential way to control diseases in crops. This research studied the induction of phytoalexins in cotyledons of Soybean and Sorghum mesocotyles from crude aqueous extracts (CAEs) and tinctures of plants of medicinal and forest species. The species used were the medicinal plants Ruta graveolens, Baccharis trimera and Origanum majorana. The results showed that CAEs are efficient in the induction of phytoalexins in cotyledons of soybean. , while CAEs of medicinal plants Baccharis trimera and Origanum majorana induce phytoalexin production in high concentrations (15, 20, 25 and 50%). Tinctures are able of inducing the production of phytoalexin in concentrations of 10 and 15% in Soybean cotyledons; however, they are not able to induce the accumulation of phytoalexins in Sorghum mesocotyles.
Subject(s)
Glycine max/classification , Sorghum/classification , Plants, Medicinal/adverse effects , Oils, Volatile/analysis , Mother TinctureABSTRACT
Petiveria alliacea (Phytolaccaceae) is a bush widely distributed in South America including Brazil, where it is popularly known as "guiné", pipi", "tipi" or "erva-de-tipi". Brazilian folk medicine attributes to the hot water infusion of its roots or leaves the following pharmacologicalproperties: antipyretic, antispasmodic, abortifacient, antirrheumatic, diuretic, analgesic and sedative. The present study has evaluated the alleged effects of P. alliacea on central nervous system (CNS), particularly, the sedative and analgesic properties of root crude aqueous extract of this plant in mice and rats. This extract showed an antinociceptive effect in acetic acid - acetylcholine - and hypertonic saline - induced abdominal constrictions, but not in hot-plate and tail flick tests P. alliacea did not produce any CNS depressor effect. Thus its antinociceptive action in animals can be responsible by its poplar use as an analgesic.