Influence of temperature on the infradian growth rhythm in<i>Ulva lactuca</i>(Chlorophyta)

Kalita, T. L.; Titlyanov, E. A.

doi:10.1080/09670262.2013.796528

Cited by 7 publications

(11 citation statements)

References 67 publications

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“…Although some setups can be expensive and/or complicated (Nagel et al, 2012;Sirault et al, 2013), the use of small and cheap computer systems, such as offered by Raspberry Pi computers and cameras (Minervini et al, 2017), together with a relatively lowlevel informatics pipeline, allow for the creation of cheap and easy-to-use phenotyping platforms. In addition, we show in this study, in agreement with the literature (Titlyanov et al, 1996;Gordillo et al, 2001;Ale et al, 2011;Kalita and Titlyanov, 2013), that the disc-based proxy systems are appropriate for detecting differences in growth performance between Ulva strains, because a strong correlation was found between thallus growth and disc growth (Fig. 1C).…”

Section: Development Of a High Throughput Phenotyping Platformsupporting

confidence: 91%

Extensive Variations in Diurnal Growth Patterns and Metabolism Among Ulva spp. Strains

et al. 2019

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Green macroalgae of the genus Ulva play a key role in coastal ecosystems and are of increasing commercial importance. However, physiological differences between strains and species have yet to be described in detail. Furthermore, the strains of Ulva used in aquaculture usually originate from opportunistic collection in the wild without prior selection of best performing strains. Hence, efforts are required to detect the potential variability in growth and metabolic accumulation between Ulva strains and ultimately select the best performing strains under given environmental conditions. Here, the growth, physiological, and metabolic characteristics of 49 laminar Ulva spp. strains were investigated using a custom-made high-throughput phenotyping platform, enzymatic assays, and gas chromatography-mass spectrometry. We found large natural variation for a wide range of growth and metabolic characteristics, with growth rates varying from 0.09 to 0.37 mg.mg 21 .d 21 among strains. Ulva spp. possess a unique diurnal growth pattern and primary metabolism compared with land plants, with higher growth rates during the night than during the light period. Starch and sucrose only contributed on average 35% of the carbon required to sustain Ulva's night growth. Nitrates accumulated during the night in Ulva tissues, and nitrate accumulation and consumption was positively correlated with growth. In addition, we identified six amino acids as possible biomarkers for high growth in Ulva. The large variability in growth and metabolite accumulation recorded among morphologically similar Ulva strains justifies future efforts in strain selection for increasing biomass, metabolite yields, and nutrient removal in the growing aquaculture industry.

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Section: Development Of a High Throughput Phenotyping Platformsupporting

confidence: 91%

Extensive Variations in Diurnal Growth Patterns and Metabolism Among Ulva spp. Strains

et al. 2019

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“…Previous studies have found that the relative growth rates of Ulva spp. in cultivation generally increases with increasing irradiance (Geertz-Hansen and Sand-Jensen 1992; Riccardi and Solidoro 1996;Taylor et al 2001;Kalita and Tytlianov 2003;Kalita and Titlyanov 2013;Mhatre et al 2019). Light saturation for the growth of U. lactuca is suggested to occur at 55 μmol photons m −2 s −1 (Sand-Jensen 1988), and the growth of the seaweeds are not inhibited at irradiances up to 225 μmol photons m −2 s −1 (Fortes and Lüning 1980).…”

Section: Discussionmentioning

confidence: 99%

“…Growth generally increases with increasing irradiance, temperature, nutrient, and pCO 2 levels (e.g. Duke et al 1986;Geertz-Hansen and Sand-Jensen 1992;Riccardi and Solidoro 1996;Taylor et al 2001;Kalita and Tytlianov 2003;Kalita and Titlyanov 2013;Olischläger et al 2013;Kumari et al 2014;Young and Gobler 2016;Gao et al 2017Gao et al , 2018aTremblay-Gratton et al 2018;Chen et al 2019;Mhatre et al 2019;Sebök et al 2019), although there are exceptions to this general pattern (e.g. Kerrison et al 2012;Liu and Zou 2015).…”

Section: Introductionmentioning

confidence: 99%

Effects of irradiance, temperature, nutrients, and pCO2 on the growth and biochemical composition of cultivated Ulva fenestrata

et al. 2020

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Ulva fenestrata is an economically and ecologically important green algal species with a large potential in seaweed aquaculture due to its high productivity, wide environmental tolerance, as well as interesting functional and nutritional properties. Here, we performed a series of manipulative cultivation experiments in order to investigate the effects of irradiance (50, 100, and 160 μmol photons m−2 s−1), temperature (13 and 18 °C), nitrate (< 5, 150, and 500 μM), phosphate (< 1 and 50 μM), and pCO2 (200, 400, and 2500 ppm) on the relative growth rate and biochemical composition (fatty acid, protein, phenolic, ash, and biochar content) in indoor tank cultivation of Swedish U. fenestrata. High irradiance and low temperature were optimal for the growth of this northern hemisphere U. fenestrata strain, but addition of nutrients or changes in pCO2 levels were not necessary to increase growth. Low irradiance resulted in the highest fatty acid, protein, and phenolic content, while low temperature had a negative effect on the fatty acid content but a positive effect on the protein content. Addition of nutrients (especially nitrate) increased the fatty acid, protein, and phenolic content. High nitrate levels decreased the total ash content of the seaweeds. The char content of the seaweeds did not change in response to any of the manipulated factors, and the only significant effect of changes in pCO2 was a negative relationship with phenolic content. We conclude that the optimal cultivation conditions for Swedish U. fenestrata are dependent on the desired biomass traits (biomass yield or biochemical composition).

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“…Yet, additional studies on plant tissue culture reported on seasonal impacts on plant tissue culture, grown under controlled conditions for 3 years, effects which could not be related directly to the starting biomass (Sharma, Hänsch, Mendel, & Schulze, ). Recent work on Ulva vegetative growth in the precisely controlled laboratory conditions showed that growth rates exhibited a rhythmic pattern with one major peak every 2 or 3 days, which authors related to large‐scale Rossby and Kelvin waves that produce oscillations in the geomagnetic fields (Kalita & Titlyanov, ). Our results indicate that for all flashing lights experiments, parallel control, cultivated under the constant light are needed.…”

Section: Resultsmentioning

confidence: 99%

Exergy efficiency of light conversion into biomass in the macroalga Ulva sp. (Chlorophyta) cultivated under the pulsed light in a photobioreactor

Habiby

Nahor

Israel

et al. 2018

Biotech & Bioengineering

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Marine macroalgae are a potential feedstock for biorefineries that can reduce dependence on fossil fuels and contribute to bioeconomy. New knowledge and technologies for efficient conversion of solar energy into macroalgae biomass are needed to increase biomass yields and energy conversion efficiency. In this work, we show that the green macroalgae from Ulva sp. can grow under the pulsed light in a photobioreactor with higher exergy conversion efficiency in comparison to cultivation under constant light with the same intensity. In the tested frequencies, 1-40 Hz and duty cycles (DC) 1-100%, DC has a stronger impact on the growth rate than frequency. The efficiency of light transformation into biomass increased with decreasing DC. Pulsating with DC 20% led to 60% of the biomass chemical energy yield for the respective constant light (DC 100%). Models of Ulva sp. growth rate and exergy conversion efficiency as a function of pulsating light parameters were developed. These results open new directions to enhance solar to chemical energy conversion through macroalgae by controlling the light distribution in the macroalgal biomass.

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Influence of temperature on the infradian growth rhythm inUlva lactuca(Chlorophyta)

Cited by 7 publications

References 67 publications

Extensive Variations in Diurnal Growth Patterns and Metabolism Among Ulva spp. Strains

Extensive Variations in Diurnal Growth Patterns and Metabolism Among Ulva spp. Strains

Effects of irradiance, temperature, nutrients, and pCO2 on the growth and biochemical composition of cultivated Ulva fenestrata

Exergy efficiency of light conversion into biomass in the macroalga Ulva sp. (Chlorophyta) cultivated under the pulsed light in a photobioreactor

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