Enhanced growth rate and ulvan yield of Ulva pertusa using light-emitting diodes (LEDs)

Le, Bao; Shin, Jong-Am; Kang, Man-Gu; Sun, Sangmi; Chung, Gyuhwa

doi:10.1007/s10499-018-0260-4

Cited by 12 publications

(3 citation statements)

References 47 publications

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“…Previous studies have reported similar growth responses to blue light among different Ulva spp. Le et al [ 49 ] demonstrated that U. australis exhibited superior growth under aerated conditions when exposed to blue light than upon exposure to red light. Gong et al [ 7 ] reported higher growth rates in U. lactuca under aerated culture conditions with blue-light-emitting diode (LED) illumination than those under fluorescent light.…”

Section: Discussionmentioning

confidence: 99%

Interactive Effects of Blue Light and Water Turbulence on the Growth of the Green Macroalga Ulva australis (Chlorophyta)

Lee,

Depuydt,

Shin

et al. 2024

Plants

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Macroalgal growth and yield are key to sustainable aquaculture. Although light and water turbulence are two important factors that affect algal productivity, research on their interaction is limited. Therefore, in this study, we investigated the effects of different wavelengths of light and the presence or absence of water turbulence on the growth of the green macroalga Ulva australis. Water turbulence was found to enhance the growth of U. australis irrespective of photosynthetic performance, but only in blue light cultures. The quantum dose of blue light required to induce 50% growth promotion was 1.02 mol m−2, which is comparable to the reported values for cryptochrome-mediated effects in other macroalgae. The combined effect of blue light and water turbulence led to the accumulation of photosynthesis-related proteins that support plastid differentiation and facilitate efficient photosynthesis and growth. Our findings thus highlight the potential of harnessing blue light and water turbulence to maximise macroalgal cultivation for sustainable and profitable algal aquaculture.

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Section: Discussionmentioning

confidence: 99%

Interactive Effects of Blue Light and Water Turbulence on the Growth of the Green Macroalga Ulva australis (Chlorophyta)

Lee,

Depuydt,

Shin

et al. 2024

Plants

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“…Similar to our findings, several other green algae Ulva prolifera and Ulva lactuca held higher Chl a content in red LED cultivation compared to white and blue LED lights ( Takada et al, 2011 ; Gong, Liu & Zou, 2020 ). However, U. pertusa was found to synthesize less Chl a and form smaller chloroplast under red light, as compared to blue and white lights ( Muthuvelan, Noro & Nakamura, 2002 ; Le et al, 2018 ). The higher Chl a concentration per fresh weight of U. pertusa may be derived from the restrained biomass accumulation under red light.…”

Section: Discussionmentioning

confidence: 99%

Artificial light source selection in seaweed production: growth of seaweed and biosynthesis of photosynthetic pigments and soluble protein

Huang

Pan

et al. 2021

PeerJ

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Seaweed growth is often limited by light. Artificial light supply has been well studied in terrestrial agriculture, however, much less is known about its effect in seaweed aquaculture. In this study, the effects of four artificial light sources (white, red, green, and blue LEDs light) on a brown alga Sargassum fusiforme and a green alga Ulva pertusa were investigated. Seaweed growth, accumulation of photosynthetic pigments (chlorophyll a and carotenoid), and soluble protein were evaluated. White LED light was the optimal supplementary light when cultivating Ulva pertusa and Sargassum fusiforme, because it promoted seaweed growth while maintaining protein production. Meanwhile, red LED was unfavored in the cultivation of S. fusiforme, as it affected the seaweed growth and has a lower residual energy ratio underneath the water. LEDs would be a promising supplementary light source for seaweed cultivation.

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“…LEDs have numerous advantages over conventional lights; for example, the light emission at specific wavelengths allows to precisely evaluate the effect of light quality on biological systems, which is especially important in photosynthesis research Jatothu 2013, Dayani et al 2016). In seaweeds, the use of LEDs is still limited to a few species and have been focused on growth studies (Murase et al 2014, Kim et al 2015, Miki et al 2017, Le et al 2018.…”

Section: Protoplast Isolationmentioning

confidence: 99%

Effects of light-emitting diodes on protoplast regeneration from gametophytic cells of the commercial kelp <italic>Undaria pinnatifida</italic> (Laminariales, Phaeophyceae)

Avila-Peltroche¹,

Won²,

Cho³

2022

Algae

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Light-emitting-diodes (LEDs) are a lighting source useful for the precise evaluation of light quality effect on biological systems. Despite the importance of light spectra on the regeneration of land plant protoplasts (“naked cells”), this factor has not been tested yet on protoplasts from multicellular algae. This study reports on the effects of pure primary colors (red, blue, and green), dichromatic (red plus blue, RB, 1 : 2) and white LEDs on protoplast regeneration from male and female Undaria pinnatifida gametophytes. We also evaluated the effect of different light spectra on pigment composition (chlorophyll a, chlorophyll c, and fucoxanthine), and the light intensities under the best condition on the regeneration process. In the early stages, blue or RB LEDs increased the percentage of dividing female protoplasts, whereas red, blue, and RB LEDs enhanced that of dividing male protoplasts. In the later stages, RB LEDs showed a positive effect only on the percentage of multiple rhizoid-like protrusions (male gametophyte). They also increased the final area of both regenerated gametophytes. The LEDs did not affect pigment composition in female gametophytes. In male gametophytes, in contrast, they reduced chlorophyll c, while blue, RB, and green LEDs decreased fucoxanthin. Under RB LEDs, the optimal light intensity was 80 μmol photons m-2 s-1 for female gametophytes and 40 to 60 μmol photons m-2 s-1 for male gametophytes. Our results suggest that dichromatic LED illumination (red–blue) improves regeneration of U. pinnatifida gametophyte-isolated protoplasts. Thus, dichromatic LEDs might a suitable light source for enhancing protoplast regeneration in brown seaweeds.

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Enhanced growth rate and ulvan yield of Ulva pertusa using light-emitting diodes (LEDs)

Cited by 12 publications

References 47 publications

Interactive Effects of Blue Light and Water Turbulence on the Growth of the Green Macroalga Ulva australis (Chlorophyta)

Interactive Effects of Blue Light and Water Turbulence on the Growth of the Green Macroalga Ulva australis (Chlorophyta)

Artificial light source selection in seaweed production: growth of seaweed and biosynthesis of photosynthetic pigments and soluble protein

Effects of light-emitting diodes on protoplast regeneration from gametophytic cells of the commercial kelp <italic>Undaria pinnatifida</italic> (Laminariales, Phaeophyceae)

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