Effects of temperature on the photosynthetic performance in mature thalli of the red alga Gelidium amansii (Gelidiaceae)

Li, Yongfu; Liu, Jianguo; Zhang, Litao; Qin, Ruiyang

doi:10.1016/j.aquaculture.2019.734320

Cited by 11 publications

(10 citation statements)

References 46 publications

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“…The purpose of our previous study was to compare the heat resistance of different Isochrysis strains. The limitation of inorganic carbon caused by the rapid increase in photosynthetic activity in a short time (especially at high temperature with a low CO 2 solubility) might be the major limiting factor of the growth of microalgae (Fu, Warner, Zhang, Feng, & Hutchins, 2007; Huertas, Montero, & Lubián, 2000; Li, Liu, Zhang, Pang, & Qin, 2019). It was difficult to distinguish whether the growth restriction of alga was caused by high temperature or carbon lacking under the condition with insufficient carbon supply.…”

Section: Discussionmentioning

confidence: 99%

Analysis of light absorption and photosynthetic activity by Isochrysis galbana under different light qualities

Liu

2020

Aquac Res

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The effect of light qualities, for example white light (WL), blue light (BL), red light (RL) and green light (GL), respectively, provided by the LEDs on the growth, pigment content, light absorption and chlorophyll fluorescence parameters of Isochrysis galbana strain IOAC724S was measured. The growth rate of algae exposed to GL was not significantly different from that of WL, but was significantly higher than that of blue light (BL) or red light (RL). These four light colours were all efficiently absorbed by algal cells, with an absorption rate up to 92%-93%. The light absorbed by pigments contributes only part of the light absorbed by cells, ranging from 8.3% (at RL) to 59.7% (at BL). Among the monochromatic light, the highest light absorption was obtained in cells cultivated at BL, but the photochemical reaction was lowered. No positive effect of monochromatic RL was found. Cells cultivated at BL and RL were, respectively, restricted by down-regulated photosynthetic efficiency and sufficient light absorption; meanwhile, GL showed a dramatic increase in photosynthetic efficiency, associated with a light absorption close to that for cells exposed to WL (both at 30.6%), suggesting that GL promotes the photosynthesis of I. galbana by balancing the light absorption and utilization.

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Section: Discussionmentioning

confidence: 99%

Analysis of light absorption and photosynthetic activity by Isochrysis galbana under different light qualities

Liu

2020

Aquac Res

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“…The chlorophyll a fluorescence (OJIP) transients of D . salina were assessed using a PEA fluorometer (Hansatech, Norfolk, UK) according to our previous study (Li et al, 2019; Zhang et al, 2016). The measurement for each treatment was repeated at least 10 times.…”

Section: Methodsmentioning

confidence: 99%

The effect of salinity shock on the growth and rapid light curve of dunaliella salina

Qin

Zhang

et al. 2021

Aquaculture Research

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To confirm the effect of hypersaline shock on the growth of Dunaliella salina, the rapid light curves and chlorophyll fluorescence in D. salina with a NaCl upshift from 80 to 160, 240 and 320 g·L−1, respectively, were measured. Results showed that the photosynthetical saturated light of Dunaliella salina was downregulated to deal effectively with the severe NaCl increase from 80 to 160, 240 and 320 g·L−1. Dunaliella salina can deal effectively with the cells’ rapid increase in NaCl from 80 to 160 g·L−1 by heat dissipation to dissipate the excess energy. Salinity with 240–320 g·L−1 NaCl led to overproduction of QA− and the destruction of the PSII acceptor side, causing inhibition of photosynthetic electron transport. Dunaliella salina can also manage the abrupt rise in NaCl concentration from 80 to 240 g·L−1 by accumulating the amount of β‐carotene and glycerol per cell. However, Dunaliella salina cannot effectively manage the rapid increase in NaCl from 80 to 320 g·L−1 due to the stronger inhibition and impaired of the PSII acceptor side. It is suitable to shade D. salina cells to 500 and 800 μmol·m−2·s−1 when cells are exposed to a severe NaCl shift from 80 to 160 g·L−1 and 80 to 240 g·L−1. NaCl ranged from 80 to 240 g·L−1 favoured the growth and carotenoid content of D. salina; however, the survival rate and photosynthetic activity were lowered by the sudden increase in NaCl.

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“…These attempts were carried out in the laboratory, inland (tanks or ponds), or in the sea (net bag method, rafts, and net pouch), forming spores, fragments, and grown from reattachment thalli [74,107,[112][113][114][115][116][117][118][119]. Different cultivation conditions were tested, assessing the influence of temperature, season, irradiance, nutrients, and water movement productivity of the biomass [94,117,[120][121][122][123]. Although the experiments succeeded to a greater or lesser extent, they resulted in low yields.…”

Section: Gelidium Cultivationmentioning

confidence: 99%

The Red Seaweed Giant Gelidium (Gelidium corneum) for New Bio-Based Materials in a Circular Economy Framework

Mouga

Fernandes

2022

Earth

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Gelidium corneum (Giant Gelidium or Atlantic agar) is a well-known red seaweed harvested for its high-quality agar content. Agar is a mixture of the polysaccharides used in the food industry as a gelling, thickener, clarifying, and stabilizer agent. The best agar quality is also used in the laboratory as bacteriological agar. Yet, in recent years, the species has been studied for many other applications. Examples of uses are pharmaceuticals, cosmetics, food supplements, bioremediation, biofuels, biofertilizers and biostimulants, biomaterials, and nanocrystals, among others. The use of this biomass, though, raises concerns about the sustainability of the resource, since this is not a cultivated species, being harvested in the wild. Thus, other uses of G. corneum biomass increase pressure on wild stocks already stressed due to climate change. However, in a biorefinery approach, a new trend is emerging, using waste biomass rather than harvested biomass to produce new bio-based materials. These are smart solutions that transform waste into innovative products, useful for various sectors of society while reducing the impact of biomass exploitation. The aim of this review paper, thus, is to address the current state of G. corneum biology, ecology, threats, its current uses and market, and the ongoing research on innovative proposals in a circular economy framework.

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Effects of temperature on the photosynthetic performance in mature thalli of the red alga Gelidium amansii (Gelidiaceae)

Cited by 11 publications

References 46 publications

Analysis of light absorption and photosynthetic activity by Isochrysis galbana under different light qualities

Analysis of light absorption and photosynthetic activity by Isochrysis galbana under different light qualities

The effect of salinity shock on the growth and rapid light curve of dunaliella salina

The Red Seaweed Giant Gelidium (Gelidium corneum) for New Bio-Based Materials in a Circular Economy Framework

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