Metabólitos secundários atuam como mecanismos de defesa espécies vegetais, na adaptação ao meio, nos processos polinização e dispersão sementes, sendo também estudados explorados para a produção fitoterápicos e, em um cenário contemporâneo, bioherbicidas ou biofertilizantes. Nesse contexto, este estudo objetivou avaliar o potencial alelopático Zingiber officinale Roscoe sobre germinação, emergê...

Several species of Orius Wolff are used in biological control of thrips in protected cultivations in temperate regions, but some of them show reproductive diapause, compromising the efficiency of these agents of biological control. There are no reports on the biology of the neotropical species Orius thyestes Herring under different environmental conditions. The purpose of this work was to inves...

OBJECTIVES Bidens species are used for their antidiabetic properties traditionally in many countries. Aim of this study is to evaluate hypoglycaemic and antidiabetic activity of Bidens tripartita extract and to identify its active compounds through bioactivity guided isolation technique. MATERIALS AND METHODS Hypoglycaemic effects of B. tripartita extract and its sub-extracts were investigate...

To understand germination timing in an ecological context, the response to environmental events that affect seed dormancy is central, and has to be combined with knowledge of germination responses to different circumstances. In this study, seed dormancy, germination, and emergence phenology of six annual co-occurring weedy Asteraceae species were investigated. Three pre-treatments (warm and col...

The aim of this study was to elucidate the mechanism of the healing process mediated by the flavonic fraction of Bidens aurea on chronic gastric ulceration induced by 5% acetic acid in rats. The diethyl ether extract (125 and 62.5 mg kg-1 body weight) was administered in a single doses, 7 and 14 days after provocation of lesions. Our results demonstrated that both doses significantly decreased ...

Screening of different extracts and fractions from the plant Bidens pilosa Linn. var. (Asteraceae) has been conducted using the in-vitro comet assay for anticancer and the antipyretic action, which was done with in-vivo models. The extract from whole plant was extracted with n-hexane, chloroform and methanol extract (E1 - E3). The extracts were fractioned by column chromatography method and fra...

The hypoglycaemic activities of four water ethanol extracts (WEE) prepared from Bidens pilosa L., Salvia officinalis L., Psacalium peltatum H.B.K. (Cass) and Turnera diffusa Willd. were investigated in healthy and alloxan-diabetic mice. The WEE of S. officinalis significantly reduced the blood glucose of fasting normal mice 120 (15.7%) and 240 min (30.2%) after intraperitoneal administration (p...