Domoic acid depuration by intertidal bivalves fed on toxin-producing Pseudo-nitzschia multiseries

Gluconic acid/gluconolactone: physiological influences on domoic acid production by bacteria associated with Pseudo-nitzschia multiseries

A single strain of Pseudo-nitzschia multiseries was grown axenically and in parallel cultures to which selected bacterial species isolated previously from P. multiseries cultures were added (non-axenic culture), an Alteromonas sp. (a producer of gluconic acid/gluconolactone when grown with glucose) and a Moraxella sp. (a non-producer of gluconic acid/gluconolactone). When gluconic acid/gluconol...

Domoic acid accumulation in Mytilus galloprovincialis: laboratory experiments with Pseudo-nitzschia multiseries

Domoic acid (DA) accumulation was studied in Mytilus galloprovincialis collected from rafts in Ría de Vigo, Spain, during short-term lab experiments. Mussels were fed Pseudo-nitzschia multiseries cultures (1900, 3800, 6000 cells/ml) and P. multiseries blooming in a phosphorus limited mesocosm. Toxin concentration in mussel whole tissue was proportional to toxin offered in food except for the lo...

Link between Domoic Acid Production and Cell Physiology after Exchange of Bacterial Communities between Toxic Pseudo-nitzschia multiseries and Non-Toxic Pseudo-nitzschia delicatissima

Bacteria are known to influence domoic acid (DA) production by Pseudo-nitzschia spp., but the link between DA production and physiology of diatoms requires more investigation. We compared a toxic P. multiseries to a non-toxic P. delicatissima, investigating links between DA production, physiological parameters, and co-occurring bacteria. Bacterial communities in cultures of both species were re...

Bloom Dynamics and Physiology of Domoic-Acid- Producing Pseudo-nitzschia Species

Effect of pH on growth and domoic acid production by potentially toxic diatoms of the genera Pseudo-nitzschia and Nitzschia

The effect of elevated pH on growth and on production of the neurotoxin domoic acid was studied in selected diatoms belonging to the genera Pseudo-nitzschia and Nitzschia. Growth of most of the 11 species studied stopped at pH values of 8.7 to 9.1. However, for P. delicatissima and N. navis-varingica the pH limit for growth was higher, 9.3 and 9.7 to 9.8, respectively. A compilation of all avai...