Nine Dictyuchus isolates were obtained from floating and decaying twigs and leaves in Anzali lagoon, Anzali County, Guilan province, Iran. They are interestingly distinguished from current Dictyuchus species by the presence of dictyoid and achlyoid type of zoospore discharge, abundant fusiform and spherical gemma, and the absence of any sexual apparatus. In addition, phylogene...

Coral bleaching involves the loss of symbiotic algae (zooxanthellae) from reef corals and other cnidarians during periods of environmental stress, particularly elevated temperature. In this study we compared the thermal bleaching responses of the zoanthid Palythoa caribaeorum from three populations along the southeast coast of Florida. Winter (2002–2003) and summer (2003) samples from three geo...

Ribosomal DNA sequence data has been important in elucidatingmolecular evolution, discerning phylogenetic relationships, and in developing species diagnostics. Species in the genus Anastrepha Schiner, particularly members of the Fraterculus Species Group, are considered the most important native pests of fruit in the New World. This study presents the Þrst complete rDNA sequence data spanning t...

The taxonomic identity and the geographical relationships of the Macaronesian endemic moss Fissidens luisieri have been studied using the chloroplast trnGUCC intron, the spacer between trnM and trnV, together with the trnV intron and ITS1 and ITS2 sequences. A comparison of F. luisieri with the most closely related species, F. serrulatus, from the same geographical areas reveals that the distri...

DNA sequences are increasingly used for taxonomic and functional assessment of environmental communities. In mycology, the nuclear ribosomal internal transcribed spacer (ITS) region is the most commonly chosen marker for such pursuits. Molecular identification is associated with many challenges, one of which is low read quality of the reference sequences used for inference of taxonomic and func...

The phylogenetic position of Sophora inhambensis (one of only three species of Sophora that occur in Africa — the others are the widespread S. tomentosa and S. velutina) is inferred from an analysis of internal transcribed spacer (ITS) sequences for the core genistoid legumes. This species was thought to be closely related to the Podalyrieae based on chemical data (alkaloids and seed flavonoids...

The compound of essential oil of thyme which was morphologically similar to Thymus pubescens (Lamiaceae) grown at Azarbijan region, was different from pervious reporters. This secondary metabolite extracted from this plant is citronellol which is the main essential oil in the rosa family. These findings showed clear chemical polymorphism with the Th. pubescens taxon that might lead us to new sp...

Plant parasitic nematode genera commonly found associated with sugarcane were collected from trial sites in various regions of the sugar industry. Nucleic acids were extracted and the rDNA internal transcribed spacer 1 (ITS1) region amplified. Identification of the important genera was possible by size differentiation of the amplification products. Sequencing of the ITS1 region was used to conf...

Nuclear DNA sequence data are essential for obtaining a complete understanding of plant species relationships, yet these data have been conspicuously absent from phylogenetic analyses of Lemnaceae (duckweeds). Using a modified Sanger sequencing protocol, we obtained DNA sequences of duckweed nuclear ribosomal regions, including 18S and 26S rDNA genes, the external transcribed spacer (ETS) and t...