Surge ammonium uptake of the cultured seaweed, Kappaphycus alvarezii (Doty) Doty (Rhodophyta: Gigartinales)

Dy, Danilo T.; Yap, Helen

doi:10.1016/s0022-0981(01)00325-2

Cited by 33 publications

(20 citation statements)

References 15 publications

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“…This initial filling of internal nutrient pools under V S has often been described for nutrient‐starved seaweeds (e.g., Fujita , Harrison et al. , Dy and Yap ). Although maximum V S for DIP could not be determined accurately, since all offered DIP was depleted in all the treatments on day 1 (Fig.…”

Section: Discussionsupporting

confidence: 55%

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Uptake kinetics and storage capacity of dissolved inorganic phosphorus and corresponding N:P dynamics in Ulva lactuca (Chlorophyta)

Lubsch

Timmermans

2018

Journal of Phycology

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Dissolved inorganic phosphorus (DIP) is an essential macronutrient for maintaining metabolism and growth in autotrophs. Little is known about DIP uptake kinetics and internal P-storage capacity in seaweeds, such as Ulva lactuca (Chlorophyta). Ulva lactuca is a promising candidate for biofiltration purposes and mass commercial cultivation. We exposed U. lactuca to a wide range of DIP concentrations (1-50 μmol · L ) and a nonlimiting concentration of dissolved inorganic nitrogen (DIN; 5,000 μmol · L ) under fully controlled laboratory conditions in a "pulse-and-chase" assay over 10 d. Uptake kinetics were standardized per surface area of U. lactuca fronds. Two phases of responses to DIP-pulses were measured: (i) a surge uptake (V ) of 0.67 ± 0.10 μmol · cm · d and (ii) a steady state uptake (V ) of 0.07 ± 0.03 μmol · cm · d . Mean internal storage capacity (ISC ) of 0.73 ± 0.13 μmol · cm was calculated for DIP. DIP uptake did not affect DIN uptake. Parameters of DIN uptake were also calculated: V = 12.54 ± 1.90 μmol · cm · d , V = 2.26 ± 0.86 μmol · cm · d , and ISC = 22.90 ± 6.99 μmol · cm . Combining ISC and V values of P and N, nutrient storage capacity of U. lactuca was estimated to be sufficient for ~10 d. Both P and N storage capacities were filled within 2 d when exposed to saturating nutrient concentrations, and uptake rates declined thereafter at 90% for DIP and at 80% for DIN. Our results contribute to understanding the ecological aspects of nutrient uptake kinetics in U. lactuca and quantitatively evaluating its potential for bioremediation and/or biomass production for food, feed, and energy.

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Section: Discussionsupporting

confidence: 55%

“…), and has often been described for nutrient‐starved seaweeds (e.g., Fujita , Harrison et al. , Dy and Yap ). The uptake rates gradually decrease as internal nutrient pools in cytoplasm and vacuoles are filled (Rosenberg et al.…”

mentioning

confidence: 89%

Uptake kinetics and storage capacity of dissolved inorganic phosphorus and corresponding N:P dynamics in Ulva lactuca (Chlorophyta)

Lubsch

Timmermans

2018

Journal of Phycology

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“…At the end of the experiment, rates were less than 15% of those obtained at the beginning. This pattern was also observed by other authors for several seaweed species (Pedersen, 1994;Campbell, 1999;Dy & Yap, 2001;Pedersen et al, 2004).…”

Section: Discussionsupporting

confidence: 89%

Study on biofiltration capacity and kinetics of nutrient uptake by Gracilaria cervicornis (Turner) J. Agardh (Rhodophyta, Gracilariaceae)

Carneiro¹,

Freire²,

Marinho‐Soriano³

2011

Rev. bras. farmacogn.

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“…In various seaweeds, the uptake of NH 4 + is greater when the initial NH 4 + Data are means ± SD (n = 4). Within a column, values not followed by the same letter are significantly different at p < 0.05 concentration is high (Dy and Yap 2001). In addition, when more nutrients are available, they are more easily absorbed (Runcie et al 2003;Pérez-Mayorga et al 2011).…”

Section: Discussionmentioning

confidence: 97%

The short-term effects of elevated CO2 and ammonium concentrations on physiological responses in Gracilariopsis lemaneiformis (Rhodophyta)

et al. 2017

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Ocean acidification (OA) and coastal eutrophication affect coastal marine organisms. We studied the physiological responses of Gracilariopsis lemaneiformis (Gracilariales, Rhodophyta) to increased concentrations of CO 2 and NH 4 + . Incubation treatments were applied at two different pH units (low, 7.5; high (control), 7.9) and three different NH 4 + concentrations (low, 10; medium, 50; high, 100 μM). Growth, rates of photosynthetic oxygen evolution, and NH 4 + uptake rates were affected by both elevated CO 2 and NH 4 + conditions. The changes in the pH of culture media were influenced by elevated CO 2 or NH 4 + treatments. However, chlorophyll fluorescence was affected only by the level of NH 4 + . These results indicate that the physiological responses of G. lemaneiformis might be enhanced when the concentrations of CO 2 and NH 4 + rise. Therefore, cultures of this alga could provide a good mitigation solution against ongoing problems with OA and coastal eutrophication.

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Surge ammonium uptake of the cultured seaweed, Kappaphycus alvarezii (Doty) Doty (Rhodophyta: Gigartinales)

Cited by 33 publications

References 15 publications

Uptake kinetics and storage capacity of dissolved inorganic phosphorus and corresponding N:P dynamics in Ulva lactuca (Chlorophyta)

Uptake kinetics and storage capacity of dissolved inorganic phosphorus and corresponding N:P dynamics in Ulva lactuca (Chlorophyta)

Study on biofiltration capacity and kinetics of nutrient uptake by Gracilaria cervicornis (Turner) J. Agardh (Rhodophyta, Gracilariaceae)

The short-term effects of elevated CO2 and ammonium concentrations on physiological responses in Gracilariopsis lemaneiformis (Rhodophyta)

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