Wilhelm Boland Institut für Organische Chemie und Biochemie, Universität Bonn, D-53121 Bonn. Bundesrepublik Deutschland Z. Naturforsch. 49c, 601-606 (1994); received March 7/May 17, 1994 Laminaria, Phaeophyceae, Pheromone Receptor Specificity, Structure-Activity Relationship The pheromone receptor specificity and threshold concentrations have been determined for spermatozoid chemotaxis in Lamin...

Non-conventional extraction of bioactive metabolites could provide sustainable alternative techniques to preserve the potency antioxidants and antiviral compounds extracted from macro-algae. In this paper, we first reviewed antioxidant potential active that exist in three known macro-algae classes; Phaeophyceae, Rhodophyceae, Chlorophyceae, a comparison between their activities is discussed. Se...

Sulfolipids were originally discovered in diatom species, in 1966, by Morris Kates [1–3]. High levels of these sulfolipids have been found in the alga Ochromonas danica (Chrysophyceae, Chrysophyta) where they constitute 15% of total lipids and 3% of the dry weight of heterotrophically grown, stationary-phase cells [4,5]. More recently, sulfolipids have also been identified in more than 30 speci...

The brown alga Ectocarpus has recently become the first fully sequenced multicellular alga and is an important biological model. Due to the large and growing number of Ectocarpus strains isolated and maintained by the research community, including increasing numbers of mutants, there is an urgent need for developing reliable, cost-effective long-term maintenance techniques. We report here that ...

The algal dominated communities immediately above and below the low-water spring level on a moderately exposed Manx shore were investigated by canopy removal experiments. Fucus serratus, Laminaria digitata and L. hyperborea were removed. Competition was shown to be important in determining the zonation of L. digitata and the distribution along the wave exposure gradient of other species such as...

Today, the UNESCO World Heritage Site of Aldabra Atoll is home to about 100 000 giant tortoises, Aldabrachelys gigantea, whose fossil record goes back to the Late Pleistocene. New Late Pleistocene fossils (age ca. 90-125 000 years) from the atoll revealed some appendicular bones and numerous shell fragments of giant tortoises and cranial and postcranial elements of crocodylians. Several tortois...

Se realizó una investigación bibliográfica y de herbario Phaeophyceae citada para el litoral Michoacán, México. añadieron datos obtenidos muestreos realizados en 11 localidades 2006 a 2014, con objetivo contribuir al conocimiento las la región. determinaron 52 taxones (49 especies 3 variedades), 27 son nuevos registros se citan por primera vez: Streblonema anomalum Ectocarpus taoniae costa del ...

Inter- and intra-specific variation in metal resistance has been observed in the ecologically and economically important marine brown macroalgae (Phaeophyceae), but the mechanisms of cellular tolerance are not well elucidated. To investigate inter-population responses of brown seaweeds to copper (Cu) pollution, the extent of oxidative damage and antioxidant responses were compared in three stra...