RESUMO
Prunus fasciculata is a wild species of Prunus native to western North America. Here, we reported the complete chloroplast (cp) genome of P. fasciculata (GenBank accession number: MW160273). The cp genome was 157,986 bp long, with a large single-copy (LSC) region of 86,068 bp and a small single-copy (SSC) region of 19,166 bp separated by a pair of inverted repeats (IRs) of 26,376 bp. It encodes 129 genes, including 84 protein-coding genes, 37 tRNA genes, and eight ribosomal RNA genes. We also reconstructed the phylogeny of Prunus sensu lato using maximum-likelihood (ML) method, including our data and previously reported cp genomes of related taxa. The phylogenetic analysis confirmed the sister group relationship between P. fasciculata and the remaining subg. Prunus.
RESUMO
This paper investigated potential utility of capillary zone electrophoresis (CZE) for very succinct but robust quantitative analysis of pyoluteorin (Plt) in anti-fungal fermentation liquor of Pseudomonas species. The experimental conditions for the separation and quantification of Plt were optimized at first. The optimized conditions are: 80 mmol/L pH 8.40 Gly-NaOH buffer, 51 cm total length (42 cm effective) and 75 microm I.D. capillary, 230 nm wavelength, 25 kV, 13 mbar 10s pressure sample injection and 24 degrees C air-cooling. Under the optimized conditions, the migration times of Plt and the internal standard phenobarbital are 2.09 and 2.49 min, respectively, the linear response of Plt concentration ranges from 5.0 to 1000 microg/mL with high correlation coefficient (r=0.99977, n=9), the limits of detection (LOD) and quantification (LOQ) for Plt are 0.66 and 2.2 microg/mL, the precision values (expressed as R.S.D.) of intra- and inter-day are 1.19-1.94% and 1.55-6.21%, respectively, the recoveries of Plt at three concentration levels of 750, 250 and 50 microg/mL range from 90.31% to 97.85% and to 98.96%, respectively. The developed method can be well used for the quantification of Plt in the fermentation liquor.
