Nitrogen and phosphorus limitation effects on cell growth, biovolume, and toxin production in Ostreopsis cf. ovata

Toxicity and Growth Assessments of Three Thermophilic Benthic Dinoflagellates (Ostreopsis cf. ovata, Prorocentrum lima and Coolia monotis) Developing in the Southern Mediterranean Basin

“…ovata cultures with a mean length and width of 55.18 ± 5.25 µm and 39.58 ± 3.61 µm, respectively (Table 1). Our results are in agreement with those of Accoroni et al (2012) [84], Vanucci et al (2012) [85] and Pezzolezi et al (2014) [86], who reported an increase in cell size and biovolume at the stationary and the decline phases of the cultures. The appearance of these large anomalous cells can be interpreted as a response to unfavorable conditions (nutrient depletion) or as a precursor of pellicle cysts at the end of the growth phase [83].…”

Effect of N:P ratio on growth and chemical composition of Nannochloropsis oculata and Tisochrysis lutea

“…Different capital letters inside the same bar type represent significant N:P ratio effects (P<0.05) between the algal species, while different small letters on top indicate significant difference in each species (P<0.05) at different levels of N:P ratio. White and grey bars represent T. lutea and N. oculata, respectively to a previous study by Vanucci et al (2012) where final cell yields of the dinoflagellate Ostreopsis ovata was increased from a low N:P ratio of 5:1 to a high N:P ratio of 16:1, which is consistent with another study using similar N:P ratios on the same dinoflagellate O. ovata (Vidyarathna and Granéli 2013). Similarly, Mayers et al (2014) have found that the maximum cell density was obtained when the Nannochloropsis sp.…”

Effects of phosphorus deficiency and adenosine 5′-triphosphate (ATP) on growth and cell cycle of the dinoflagellate Prorocentrum donghaiense

“…Evolutionary adaptation in oligotrophic environments drives toward small cell size, for its larger surface-to-volume ratio and hence thinner diffusion boundary layer (Pasciak and Gavis, 1974) confers higher efficiency in obtaining low-abundance nutrients (Kostadinov et al, 2010;Sunda and Hardison, 2010). Accordingly, nutrient limitation of growth rate in phytoplankton usually leads to a reduction in cell size, as in the case of nitrogen (Ransom Hardison et al, 2012;Hardison, 2007, 2010;Vanucci et al, 2012) and iron (Sunda and Huntsman, 1995). This is consistent with findings in the model eukaryote yeast, in which nutrient-limited conditions usually result in smaller cell size (Turner et al, 2012).…”