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17 results for “Prorocentrum”
Deciphering interactions between the marine dinoflagellate Prorocentrum lima and the fungus Aspergillus pseudoglaucus
<p>The comprehension of microbial interactions is one of the key challenges in marine microbial ecology. This study focused on exploring chemical interactions between the toxic dinoflagellate <em>Prorocentrum lima</em> and a filamentous fungal species, <em>Aspergillus pseudoglaucus</em>, which has been isolated from the microalgal culture. Such interspecies interactions are expected to occur even though they were rarely studied. Here, a co-culture system was designed in a dedicated microscale marine-like condition. This system allowed to explore microalgal-fungal physical and metabolic interactions in presence and absence of the bacterial consortium. Microscopic observation showed an unusual physical contact between the fungal mycelium and dinoflagellate cells. To delineate specialized metabolome alterations during microalgal-fungal co-culture metabolomes were monitored by high-performance liquid chromatography coupled to high-resolution mass spectrometry. In-depth multivariate statistical analysis using dedicated approaches highlighted (1) the metabolic alterations associated with microalgal-fungal co-culture, and (2) the impact of associated bacteria in microalgal metabolome response to fungal interaction. Unfortunately, only a very low number of highlighted features were fully characterised. However, an up-regulation of the dinoflagellate toxins okadaic acid and dinophysistoxin 1 was observed during co-culture in supernatants. Such results highlight the importance to consider microalgal-fungal interactions in the study of parameters regulating toxin production.</p>
Figure 5 in Response of marine microalgae Phaeodactylum tricornutum, Prorocentrum cordatum and Gyrodinium fissum to complex pollution of Sevastopol bays (Black Sea)
Figure 5. Influence of the polluted waters of the Sevastopol area to P. tricornutum (I), P. cordatum (II) and G. fissum (III): a) – inhibition effect, b) stimulated effect and c) absence of effect.
Figure 4 in Response of marine microalgae Phaeodactylum tricornutum, Prorocentrum cordatum and Gyrodinium fissum to complex pollution of Sevastopol bays (Black Sea)
Figure 4. Dynamics of the cells abundance in the cultures of P. tricornutum (a), P. cordatum (b) and G. fissum (c) in control (1), on the water of the mussel farm area (2), Artillery Bay (3) and Sevastopol Bay (4) in October 2020.
Figure 1 in Response of marine microalgae Phaeodactylum tricornutum, Prorocentrum cordatum and Gyrodinium fissum to complex pollution of Sevastopol bays (Black Sea)
Figure 1. Map of the seawater sampling stations location: 1 – mussel farm area, 2 – Artillery Bay, 3 – Sevastopol Bay.
Figure 3 in Response of marine microalgae Phaeodactylum tricornutum, Prorocentrum cordatum and Gyrodinium fissum to complex pollution of Sevastopol bays (Black Sea)
Figure 3. Dynamics of the cells abundance in the cultures of P. tricornutum (a), P. cordatum (b) and G. fissum (c) in control (1), on the water from the mussel farm area (2), Artillery Bay (3) and Sevastopol Bay (4) in September 2020.
Fig. 3 in Detection of Prorocentrum shikokuense in the Mediterranean Sea and evidence that P. dentatum, P. obtusidens and P. shikokuense are three different species (Prorocentrales, Dinophyceae)
Fig. 3. Phylogenetic tree based on D1/D2 LSU rRNA gene sequences, showing the position of the sequence of Prorocentrum shikokuense by Maximum Likelihood (ML). Numbers near branches denote ML bootstrap (BS) and Bayesian posterior probability (PP) values. BS and PP values <70 and 0.8, respectively, are not shown.
Fig. 5. A in Detection of Prorocentrum shikokuense in the Mediterranean Sea and evidence that P. dentatum, P. obtusidens and P. shikokuense are three different species (Prorocentrales, Dinophyceae)
Fig. 5. A comparison of the line drawings in Stein (1883) and micrographs of Tripos eugrammus (A) and Dinophysis tripos (B). The arrows point the Stein's drawing style with acuter appendices than in the real morphology of the cells.
Fig. 2 in Detection of Prorocentrum shikokuense in the Mediterranean Sea and evidence that P. dentatum, P. obtusidens and P. shikokuense are three different species (Prorocentrales, Dinophyceae)
Fig. 2. Phylogenetic tree based on SSU rRNA gene sequences, showing the position of the sequence of Prorocentrum shikokuense by Maximum Likelihood (ML). Numbers near branches denote ML bootstrap (BS) and Bayesian posterior probability (PP) values. BS and PP values <70 and 0.8, respectively, are not shown.
Fig. 4 in Detection of Prorocentrum shikokuense in the Mediterranean Sea and evidence that P. dentatum, P. obtusidens and P. shikokuense are three different species (Prorocentrales, Dinophyceae)
Fig. 4. Phylogenetic tree based on ITS rRNA gene sequences, showing the position of the sequence of Prorocentrum shikokuense by Maximum Likelihood (ML). Numbers near branches denote ML bootstrap (BS) and Bayesian posterior probability (PP) values. BS and PP values <70 and 0.8, respectively, are not shown.
Stressor-induced ecdysis and thecate cyst formation in the armoured dinoflagellates Prorocentrum cordatum
<p>The culture of the dinoflagellates Prorocentrum cordatum was subjected to various stressors to induce the process of ecdysis. The stressors were centrifugation, vortexing, changes in temperature, salinity and pH, application of 2,3-dichlorobenzonitrile and tetracycline. The rates of complete ecdysis and ecdysis initiation, as well as mortality rate were calculated following the treatments. Rate of ecdysis induced by centrifugation was additionally estimated in the cultures at the different growth phases.</p>
Figure 2 in Response of marine microalgae Phaeodactylum tricornutum, Prorocentrum cordatum and Gyrodinium fissum to complex pollution of Sevastopol bays (Black Sea)
Figure 2. Dynamics of the cells abundance in the cultures of P. tricornutum (a), P. cordatum (b) and G. fissum (c) in control (1), on the water from the mussel farm area (2), Artillery Bay (3) and Sevastopol Bay (4) in June 2020.
Fig. 1 in Detection of Prorocentrum shikokuense in the Mediterranean Sea and evidence that P. dentatum, P. obtusidens and P. shikokuense are three different species (Prorocentrales, Dinophyceae)
Fig. 1. Light micrographs of Lugol's solution preserved individuals and line drawings of Prorocentrum dentatum (A–I), P. obtusidens (J– AC) and P. shikokuense (AB, AD–AH). (A–B) Prorocentrum dentatum by Stein (1883). (C–I) Individuals from the Pacific Ocean. See Table 1 for location. (J) Prorocentrum obtusidens re-drawn from Schiller (1928). (K–AB) Individuals from a single sample collected offshore Taranto, Ionian Sea. (Y–AB) Valves of the same individual. (AB) One cell of P. obtusidens and two cells of P. shikokuense. (AC) P. obtusidens collected offshore Bari, Adriatic Sea. (AD) Prorocentrum shikokuense redrawn from Hada (1975). (AB, AE–AH) Individuals from a single sample of the harbor of Brindisi, Italy. (AE–AG) Chain-forming individuals. (AH) Note the intraspecific morphological variability. The last individual corresponds to a megacytic cell. Scale bar = 10 µm.
Transcriptome of Dinoroseobacter shibae in co-culture with the dinoflagellate Prorocentrum minimum [RNA-seq]
GEO Series GSE53871. Dinoroseobacter shibae DFL 12 = DSM 16493. 6 samples. Type: Expression profiling by high throughput sequencing.
Transcriptome of Dinoroseobacter shibae in co-culture with the dinoflagellate Prorocentrum minimum at different growth stages
GEO Series GSE55371. Dinoroseobacter shibae DFL 12 = DSM 16493. 6 samples. Type: Expression profiling by high throughput sequencing.
Transcriptome of Dinoroseobacter shibae in co-culture with the dinoflagellate Prorocentrum minimum
GEO Series GSE53967. Dinoroseobacter shibae DFL 12 = DSM 16493. 25 samples. Type: Expression profiling by array; Expression profiling by high throughput sequencing.
Light-dark changes in the transcriptome of Dinoroseobacter shibae in co-culture with the dinoflagellate Prorocentrum minimum
GEO Series GSE53846. Dinoroseobacter shibae DFL 12 = DSM 16493. 2 samples. Type: Expression profiling by array.
Mytilus galloprovincialis, digestive gland and gill, exposed to Prorocentrum lima, producers of okadaic acid.
GEO Series GSE72817. Mytilus galloprovincialis. 8 samples. Type: Expression profiling by array.
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