pantoea ananatis is an important pathogen causing bacterial center rot in onion. isolated strains from onion soft rot bulbs based on morphological characteristics were tested for hypersensitivity reaction on tobacco. pathogenic strains underwent some biochemical tests which detected the presence of p. ananatis, based on rna16s sequencing, this result was confirmed. symptoms were reproduced by i...

Sesbania Grandiflora (Family: Leguminosae) is a medicinal plant used as tumor suppressant agent in Ayurveda, a traditional system of medicine practiced in sub-continental India. The aim of the study was to systematically investigate and reveal the cytotoxic potential of sesbania grandiflora bark extract [petroleum ether (BP), Chloroform (BC), Methanol extract (BM) and Aqueous extract (BA)] agai...

A simple tandem mass spectrometry method for differentiating isomeric monoglycosyl flavonols, flavones, and flavanones using manganese complexation is reported. Dissociation of the [Mn(II) (L) (L - H)]+ and [Mn(II) (L)2 (L - H)]+ species provides unique fragment ions that allow the identification of the saccharide moiety as glucose, galactose, arabinose, or xylose. The glycosylation site of the...

This study assessed the cytotoxic and genotoxic potentials of extracts Psittacanthus acinarius (Mart.) Mart. cordatus (Hoffmanns.) in root cell cycle Allium cepa L. Aqueous leaf P. at three concentrations: 0.00, 5 20 mg/mL for 24 hours. Histological slides were prepared mitotic indices (MI %) chromosomal alteration (CAI determined. Inhibitory effects aqueous extract leaves observed 46.33 46.00%...

Medicinal plants have been used in medicoculturally diverse countries around the world, where it is a part of a time-honoured tradition that is respected even today. Polyalthia longifolia leaf extract has been previously reported as an efficient antioxidant in vitro. Hence, the genotoxic effects of P. longifolia leaf were investigated by using plasmid relation, comet, and Allium cepa assay. In ...

In the present work the effect of quercetin obtained from (Allium cepa). Albizzia lebbek (crude extract of seeds) and a pure saponin fraction of Albizzia has been studied on the mast cells in the mesentery and peritoneal fluid of rats subjected to anaphylaxis. The results show a mast cell membrane stabilizing effect of these test drugs.