MOTIVATION Lately the use of 16S-23S Intergenic Transcribed Spacer (ITS) sequences for bacterial typing purposes has increased. The presence of conserved regions like tRNA genes or boxes together with hypervariable regions allows performing intraspecific discrimination of very close bacterial strains. On the other hand this mosaic of variability makes the ITS a sequence difficult to analyze and...

Ribosomal DNA (rDNA) of plants is present in high copy number and shows variation between and within species in the length of the intergenic spacer (IGS). The 45S rDNA of flowering plants includes the 5.8S, 18S and 25S rDNA genes, the internal transcribed spacer (ITS1 and ITS2), and the intergenic spacer 45S-IGS (25S-18S). This study identified six different types of 45S-IGS, A to F, which at 3...

Green tides are a serious global ecological disaster; the largest occur in Southern Yellow Sea (SYS). Early-stage green SYS composed of four species (Ulva prolifera, Ulva flexuosa, linza, and compressa). We found that U. aragoensis is constituent based on molecular data. Furthermore, this study re-evaluated proportion it was more prevalent micro-propagules cultured from surface seawater during ...

dunaliella is a green halotolerant microalga, which has several industrial applications e.g. β-carotene production. identification of different dunaliella species has been carried out by morpho-physiological and recently molecular studies. to achieve an improved understanding of taxonomy, these studies are required to be in linkage. the present study describes molecular and specific morpho-phys...

theplant pathogenic phytophthora drechsleri is morphologically similar to some other non-papillate phytophthora spp., especially p. melonis, and it is difficult to discriminate these convergent taxa. it seems that the iranian putative p. drechsleri isolates from different cucurbit species have been generally misidentified and their characteristics do not match with p. drechsleri. in order to co...