Nutrient Transport in Microalgae

Cytological evidence for cytoplasmic volume control inPlatymonas subcordiformisafter osmotic stress

“…These values are close to values estimated for other micro-algae (see review by Raven, 1980). The cell size of Platymonas has increased 19 Figure 19.…”

“…In Table 1 the changes in the relative volumes of cell compartments after hypo-osmotic stress (dilution down to 160 mosmol kg"') are summarized as evaluated on the basis of randomly selected electron micrographs (according to the criterion described in the Materials and methods). These values are close to values estimated for other micro-algae (see review by Raven, 1980). The cell size of Platymonas has increased 19 Figure 19.…”

Cytological evidence for cytoplasmic volume control inPlatymonas subcordiformisafter osmotic stress

“…These values are close to values estimated for other micro-algae (see review by Raven, 1980). The cell size of Platymonas has increased 19 Figure 19.…”

“…In Table 1 the changes in the relative volumes of cell compartments after hypo-osmotic stress (dilution down to 160 mosmol kg"') are summarized as evaluated on the basis of randomly selected electron micrographs (according to the criterion described in the Materials and methods). These values are close to values estimated for other micro-algae (see review by Raven, 1980). The cell size of Platymonas has increased 19 Figure 19.…”

Uptake of urea C and urea N by the coastal marine diatom Thalassiosira pseudonana

“…Interestingly, this influx rate agrees well with the active influx measured by Williams and Hodson (1977) in Chlamydomonas reinhardi (1.8 pmol urea cm-2 s-l) (Raven 1980). During the 0.5-2-min interval, 0.024 fmol 14C cell-' was taken up.…”

Dinophyte Flagella: A Cost‐benefit Analysis

“…Fppley et al, 1969). This lack of effect of the presence and activity of flagella on unstirred layers is in accord with theoretical predictions (Raven, 1980(Raven, , 1984Vogel, 1981). Accordingly, we may conclude that the major effect of the presence and activity of flagella on nutrient acquisition by phytoplankters relates to migration to areas of higher bulk phase concentration of the nutrient rather than in increasing the potential flux of nutrient from the bulk phase to the cell surface by disrupting unstirred layers.…”

Cytological evidence for cytoplasmic volume control inPlatymonas subcordiformisafter osmotic stress

“…These values are close to values estimated for other micro-algae (see review by Raven, 1980). The cell size of Platymonas has increased 19 Figure 19.…”

“…In Table 1 the changes in the relative volumes of cell compartments after hypo-osmotic stress (dilution down to 160 mosmol kg"') are summarized as evaluated on the basis of randomly selected electron micrographs (according to the criterion described in the Materials and methods). These values are close to values estimated for other micro-algae (see review by Raven, 1980). The cell size of Platymonas has increased 19 Figure 19.…”

Uptake of urea C and urea N by the coastal marine diatom Thalassiosira pseudonana

“…Interestingly, this influx rate agrees well with the active influx measured by Williams and Hodson (1977) in Chlamydomonas reinhardi (1.8 pmol urea cm-2 s-l) (Raven 1980). During the 0.5-2-min interval, 0.024 fmol 14C cell-' was taken up.…”

Dinophyte Flagella: A Cost‐benefit Analysis

“…Fppley et al, 1969). This lack of effect of the presence and activity of flagella on unstirred layers is in accord with theoretical predictions (Raven, 1980(Raven, , 1984Vogel, 1981). Accordingly, we may conclude that the major effect of the presence and activity of flagella on nutrient acquisition by phytoplankters relates to migration to areas of higher bulk phase concentration of the nutrient rather than in increasing the potential flux of nutrient from the bulk phase to the cell surface by disrupting unstirred layers.…”

Cytological evidence for cytoplasmic volume control inPlatymonas subcordiformisafter osmotic stress

“…These values are close to values estimated for other micro-algae (see review by Raven, 1980). The cell size of Platymonas has increased 19 Figure 19.…”

“…In Table 1 the changes in the relative volumes of cell compartments after hypo-osmotic stress (dilution down to 160 mosmol kg"') are summarized as evaluated on the basis of randomly selected electron micrographs (according to the criterion described in the Materials and methods). These values are close to values estimated for other micro-algae (see review by Raven, 1980). The cell size of Platymonas has increased 19 Figure 19.…”

Uptake of urea C and urea N by the coastal marine diatom Thalassiosira pseudonana

“…Interestingly, this influx rate agrees well with the active influx measured by Williams and Hodson (1977) in Chlamydomonas reinhardi (1.8 pmol urea cm-2 s-l) (Raven 1980). During the 0.5-2-min interval, 0.024 fmol 14C cell-' was taken up.…”

Dinophyte Flagella: A Cost‐benefit Analysis

“…Fppley et al, 1969). This lack of effect of the presence and activity of flagella on unstirred layers is in accord with theoretical predictions (Raven, 1980(Raven, , 1984Vogel, 1981). Accordingly, we may conclude that the major effect of the presence and activity of flagella on nutrient acquisition by phytoplankters relates to migration to areas of higher bulk phase concentration of the nutrient rather than in increasing the potential flux of nutrient from the bulk phase to the cell surface by disrupting unstirred layers.…”