Ethanolic crude extracts from seven marine algal species belong to Clorophyceae (Cladophora glomerata, Enteromorpha linza, Ulva rigida), Phaeophyceae (Cystoseira barbata, Padina pavonica) and Rhodophyceae (Corallina officinalis, Ceramium ciliatum) from the coast of Vona, Turkey were evaluated in vitro for the antibacterial and antifungal activity of six bacteria and two fungus with the paper di...

The brown alga Dictyopteris serrata (Areschoug) Hoyt (Dictyotales, Phaeophyceae) is reported from the coast of western Australia, representing the first reliable record of this species from outside the south-western Indian Ocean. Distinguishing features of D. serrata are: a broad thallus with marginal teeth, veins extending from the midrib obliquely towards the blade margin, and embedded tetras...

Seaweed is one of the largest producers of biomass in marine environment and is a rich arsenal of active metabolites and functional ingredients with valuable beneficial health effects. Being a staple part of Asian cuisine, investigations on the crude extracts of Phaeophyceae or brown algae revealed marked antitumor activity, eliciting a variety of research to determine the active ingredients in...

The Elachista dispilella group and its subordinate E. dispilella species complex are characterized. Identity of the long confused oldest names applicable for taxa in the E. dispilella complex, i.e., E. dispilella Zeller, E. festucicolella Zeller, and E. distigmatella Frey, is resolved. Elachista dispilella Zeller is the valid name for the species often identified as E. festucicolella, E. steuer...

Carotenoids in eukaryotic phototrophic organisms can be classified into two groups; β-carotene and its derivatives, and α-carotene and its derivatives. We re-examined distribution of α-carotene and its derivatives among various taxa of aquatic algae (17 classes) and land plants. α-carotene and its derivatives were found from Rhodophyceae (macrophytic type), Cryptophyceae, Euglenophyceae, Chlora...

Rubisco (ribulose-1, 5-bisphosphate carboxylase/oxygenase), a key enzyme of photosynthetic CO(2) fixation, is one of the most abundant proteins in both higher plants and algae. In this study, the differential expression of Rubisco in sporophytes and gametophytes of four seaweed species--Porphyra yezoensis, P. haitanensis, Bangia fuscopurpurea (Rhodophyte) and Laminaria japonica (Phaeophyceae)--...

Coastal urbanization is rapidly expanding worldwide while its impacts on seaweed communities remain poorly understood. We assessed the impact of urbanization along an extensive latitudinal gradient encompassing three phycogeographical regions in the SW Atlantic. Human population density, number of dwellings, and terrestrial vegetation cover were determined for each survey area and correlated wi...

Besides ultrastructural and biochemical characteristics, thallus color, which is due to antenna pigments of the photosynthetic apparatus, is one of the major distinguishing criteria in the classification of algae, finding its reflection in the likes of cyanoprocaryota, rhodophyta, chlorophyta, xanthophyceae, chrysophyceae, or phaeophyceae. The majority of past studies on algal pigments, however...