Reproductive sterility increases the capacity to exploit the green seaweed Ulva rigida for commercial applications

Gao, Guang; Clare, Anthony S.; Rose, Craig; Caldwell, Gary S.

doi:10.1016/j.algal.2017.03.008

Cited by 40 publications

(20 citation statements)

References 57 publications

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“…A similar DIP uptake was found by Gao et al. () for a mutant strain of Ulva rigida , with an uptake of 5.7 ± 0.04 μmol · g FW −1 · d −1 , which resembles an uptake of 0.06 ± 0.04 μmol · cm −2 · d −1 , given our correlation factors (Fig. ).…”

Section: Discussionsupporting

confidence: 91%

“…The V M (DIP) for maintenance DIP requirements in Ulva lactuca was calculated as 0.07 AE 0.04 lmol Á cm À2 Á d À1 . A similar DIP uptake was found by Gao et al (2017) for a mutant strain of Ulva rigida, with an uptake of 5.7 AE 0.04 lmol Á g FW À1 Á d À1 , which resembles an uptake of 0.06 AE 0.04 lmol Á cm À2 Á d À1 , given our correlation factors (Fig. 3).…”

Section: Fig 4 Meansupporting

confidence: 87%

“…An essential macronutrient for maintaining the metabolism and growth of these autotrophs is dissolved inorganic phosphorus (DIP), along with dissolved inorganic nitrogen (DIN). Understanding the demand and management strategy for nutrients by seaweeds is economically and ecologically of central importance, as it allows for optimal manipulation in cultivation and bioremediation applications (Gao et al 2017). Furthermore, an insight into nutrient management of seaweeds opens up opportunities to forecast ecological impacts of nutrient limitation and shifts in limitation from one element to another, all of which can significantly affect the internal composition, physiology, and growth of seaweeds Borum 1996, Gevaert et al 2001).…”

mentioning

confidence: 99%

“…Ulva lactuca is also recognized as a promising species for commercial mass cultivation and subsequent production of food, animal feed, and fertilizer (Critchley and Ohno 1998, Sahoo 2000, Thangaraju 2008, Holdt and Kraan 2011. Only a few studies have examined DIP uptake kinetics and internal DIP storage capacity in seaweeds in general (e.g., Gordon et al 1981, Chopin et al 1997, Gordillo et al 2002, Pederson et al 2010, Gao et al 2017) and in U. lactuca, in particular (Runcie et al 2004, Tsagkamilis et al 2010. The majority of studies related to the efficiency of N and P removal from seawater by U. lactuca have been conducted under field conditions , Naldi and Viaroli 2002, Neori et al 2003.…”

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confidence: 99%

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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: 91%

Section: Fig 4 Meansupporting

confidence: 87%

mentioning

confidence: 99%

mentioning

confidence: 99%

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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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“…4.51 ± 0.14 b 1.37 ± 0.16 a References: (Harchi et al, 2018); (Paiva et al, 2017); (Gao et al, 2017); (Chemodanov et al, 2017); (Korzen et al, 2015). of 400 g than with 10 or 50 g of dry solid.…”

Section: Scale-up Of Enzymes Production In Tray-type Bioreactorsmentioning

confidence: 99%

Sequential bioprocessing of Ulva rigida to produce lignocellulolytic enzymes and to improve its nutritional value as aquaculture feed

Fernandes

Salgado

Martins

et al. 2019

Bioresource Technology

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A B S T R A C TThe macroalgae aquaculture industry has grown up in the last years, and new applications for macroalgae should be considered. In this work, sequential biological treatments as solid-state fermentation (SSF) by Aspergillus ibericus and enzymatic hydrolysis (EH) were applied to washed and unwashed Ulva rigida. SSF of unwashed macroalgae showed higher xylanase (359.8 U/g), cellulase (73.07 U/g) and β-glucosidase (14.9 U/g) activities per dry mass of macroalgae. After SSF, two strategies to carry out EH were assayed. The best process was SSF followed by EH by simply adding a buffer. The non-starch polysaccharides content was reduced by 93.2%, achieving a glucan conversion of 98%. In addition, the antioxidant activity was improved 2.8-fold and the protein concentration of macroalgae extracts increased from 16.9% to 29.8% (w/w). These biological treatments allowed to increase macroalgae value as feedstuff with potential for use in aquafeeds. 2015). Even thought, macroalgae are usually dried to be preserved, SSF

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Evidence from preliminary experiments revealed drifted Ulva biomass has seedling and aquaculture potential

et al. 2022

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Reproductive sterility increases the capacity to exploit the green seaweed Ulva rigida for commercial applications

Cited by 40 publications

References 57 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)

Sequential bioprocessing of Ulva rigida to produce lignocellulolytic enzymes and to improve its nutritional value as aquaculture feed

Evidence from preliminary experiments revealed drifted Ulva biomass has seedling and aquaculture potential

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