Oils extracted from Cymbopogon citratus, Lantana camara, Artemisia camphorata, and Imperata cylindrica plants were used as potential insecticides against the rice weevil, Sitophilus oryzae (L.) (Coleoptera: Curculionidae). The phytochemical composition of isolated oils was identified by gas chromatograph-mass spectrometry (GC-MS). Oil contact toxicities evaluated adults S. oryzae. activities ac...

Abstract Cymbopogon species are widely distributed worldwide and known for their high essential oil content with potential commercial medicinal benefits justifying inclusion in food cosmetics. Most received scant characterization regarding full complement of bioactive constituents necessary to explain activities. In this study, the metabolite profiles 5 species, C . citratus , flexuosus proceru...

The aim of this study was determine the volatile compounds, antimicrobial and antioxidant activity of the essential oils (EOs) of cinnamon (Cinnamomum verum), fenugreek seeds (Trigonella foenum greacum), ginger (Zingiber officinale) and marjoram (Origanum majorana) widely consumed in Egypt. EOs showed a great variety of compounds in their chemical compositions, Trans-cinnamyl aldehyde, terpinen...

Dracocephalum kotschyi (Lamiaceae), as one of the remarkable aromatic plants, widely grows and also is cultivated in various temperate regions of Iran. There are diverse reports about the composition of the oil of this plant representing limonene derivatives as its major compounds. There is no report on cloning of monoor sesquiterpene synthases from this plant. In the present study, the aroma p...

Cymbopogon citratus DC. Stapf, Poaceae, is used in the folk medicine for hypertension treatment. This work investigated the chemical composition and cardiovascular effects in rats of C. citratus essential oil (EOCC). A phytochemical screening demonstrated the presence of eight constituents, being geranial the major compound (43.08%). In rats, EOCC (1, 5, 10, and 20 mg/kg, i.v.) induced transien...

Geranyl diphosphate (GPP), the precursor of most monoterpenes, is synthesized in plastids from dimethylallyl diphosphate and isopentenyl diphosphate by GPP synthases (GPPSs). In heterodimeric GPPSs, a non-catalytic small subunit (GPPS-SSU) interacts with a catalytic large subunit, such as geranylgeranyl diphosphate synthase, and determines its product specificity. Here, snapdragon (Antirrhinum ...

Essential oil of Cymbopogon citratus collected from Brazil and Cuba was tested to a chemical characterization and then was tested on the post-embryonic development of Musca domestica. The chemical composition analysis by GCMS of the oils from Brazil/Cuba allowed the identification of 13 and 12 major constituents respectively; nine of them common to both. In the both oils, the main components we...

Virus-induced gene silencing (VIGS) is a powerful tool for reverse genetics in tomato (Solanum lycopersicum). However, the irregular distribution of the effects of VIGS hampers the identification and quantification of nonvisual phenotypes. To overcome this limitation, a visually traceable VIGS system was developed for fruit, comprising two elements: (1) a transgenic tomato line (Del/Ros1) expre...

Many Gram-negative pathogens have the ability to produce N-acylhomoserine lactones (AHLs) as signal molecules for quorum sensing (QS). This cell-cell communication system allows them to coordinate gene expression and regulate virulence. Strategies to inhibit QS are promising for the control of infectious diseases or antibiotic resistant bacterial pathogens. The aim of the present study was to e...

Abstract Bark beetles of the genus Polygraphus have recently been involved in large bark beetle outbreaks central Sweden, together with European spruce Ips typographus . Three species can be found this region; poligraphus , punctifrons and subopacus Efficient pheromone traps would facilitate further investigations these their role outbreaks. Pheromone compounds previously identified P. but not ...