Laboratory experiments identified microviridin J as the source of a fatal molting disruption in Daphnia species organisms feeding on Microcystis cells. The molting disruption was presumably linked to the inhibitory effect of microviridin J on daphnid proteases, suggesting that hundreds of further cyanobacterial protease inhibitors must be considered potentially toxic to zooplankton.

Medicinal plants are highly valued for their active compounds. These can be used in various fields and preservation of these environment. The present study aimed to screen medicinal traditional medicine Medina valleys the presence metabolites, answer following question: is ethnomedicinal importance conform primary secondary metabolite content. Eight (Pulicaria incise, Heliotropium arbainense, C...

A new species of the eucerine bee genus Tetraloniella Ashmead (Apinae: Eucerini) is described and figured from central Saudi Arabia and Qatar. Tetraloniella (Tetraloniella) persiciformissp. n. is distinguished on the basis of coloration, integumental sculpturing, male metafemoral structure, and male terminalia. A floral record of Pulicaria undulata (L.) C.A. Mey. (Compositae) is noted for some ...

Francoeuria undulata (L.) LACK is often synonymous with two species of the genus Pulicaria,i.e. Pulicaria undulata (L.) C.A. Mey and Pulicaria crispa (Forssk.) olive, which are oftenincluded under the genus Francoeuria. The essential oil yield and compositions in the fivenatural populations of Francoeuria undulata from Fars Province in southern Iran weredetermined by GC and GC/MS analysis. The ...

Cyclical parthenogens are a valuable system in which to empirically test theoretical predictions as to the genetic consequences of sexual reproduction in natural populations, particularly if the frequency of sexual relative to asexual reproduction can be quantified. In this study, we used a series of lake populations of the cyclical parthenogen, Daphnia pulicaria, that vary consistently in thei...