objective: premenstrual syndromes (pms) affecting 20-40% of women of reproductive age. the aim of this double blind and placebo controlled trial was to investigate whether femicofort a supplement contains vitamin b6, vitamin e and evening primrose oil could relieve symptoms of pms. method: this was a randomized and double blind clinical trial. the trial was conducted between november 2009 and a...

disadvantages such as indeterminate inflorescence and high seed shattering during ripening are significant restrictions to introduce evening primrose as a commercial medicinal plant. following to the last works, a pot experiment was conducted to clarify the influence of defoliation before harvest on the seed yield, oil and gla (gamma-linolenic acid) percentage of evening primrose growing under ...

In 1978 when Straley adopted the name Oenothera fruticosa L. subsp. glauca (Michx.) Straley for one of the two recognized subspecies of O. fruticosa it was the correct name for this taxon; however, since that time the botanical code has changed so that now an autonym is treated as having priority over the name or names of the same date and rank that established it. This change means that since ...

Insect herbivores are hypothesized to be major factors affecting the ecology and evolution of plants. We tested this prediction by suppressing insects in replicated field populations of a native plant, Oenothera biennis, which reduced seed predation, altered interspecific competitive dynamics, and resulted in rapid evolutionary divergence. Comparative genotyping and phenotyping of nearly 12,000...

Ellagitannins are bioactive plant polyphenols of which more than 500 individual compounds have been identified from plants. An ellagitannin-rich fraction was isolated by Sephadex LH-20 from Oenothera biennis (common evening primrose) leaves and roots and analysed by high-performance liquid chromatography/diode-array detection coupled to high-resolution mass spectrometry with an electrospray ion...

1. Genotypic diversity in plant populations is known to enhance plant performance and ecosystem function. Nonetheless, the effect of genotypic diversity has rarely been examined across a population’s lifecycle despite the expectation that changing conditions, such as population density, will alter the benefits of diversity. 2. We simultaneously manipulated a component of genotypic diversity (ri...

Toward the standardization of common evening primrose (Oenothera biennis) sprout extract (OBS-E), we aimed to obtain indicator compounds and use a validated method. HPLC-UVD allowed simultaneous quantification quercetin-3-O-glucuronide ellagic acid. The method was in terms specificity, linearity, precision, accuracy, limit detection/limit (LOD/LOQ). High specificity linearity demonstrated, with...