Enhancement of photosynthesis in Synechococcus bacillaris by sponge-derived Ageladine A

Bickmeyer, Ulf; Thoms, Silke; Koch, Florian; Mukagatare, Liliane Petety; Silalahi, Romaston; Sartoris, Franz-Josef

doi:10.1371/journal.pone.0213771

Cited by 8 publications

(6 citation statements)

References 42 publications

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“…Bickmeyer et al [ 16 ] hypothesised that UV radiation absorbed by Ag A and subsequently emitted as fluorescence in the visible spectrum could aid algal photosynthesis in Synechococcus bacillaris . The oxygen evolution in S .…”

Section: Discussionmentioning

confidence: 99%

“…Since sponges have been found to harbour a plethora of microalgal species as symbionts [ 9 – 15 ] and molecules changing light availability in favour of photosynthesis have been found in several hosts [ 1 , 5 – 8 ], Bickmeyer et al [ 16 ] hypothesised, that this underlying principle may be universally attributed to phototrophs.…”

Section: Discussionmentioning

confidence: 99%

“…Once inside an acidic compartment, however, it becomes protonated and trapped. Based on this, Bickmeyer et al [ 16 ] hypothesised that Ag A accumulates in the thylakoid lumen where it provides light to algal pigments, thus increasing photosynthetic efficiency under UV radiation. Indeed, their experiments with Synechococcus bacillaris showed that photosynthetic oxygen evolution increased 2.5-fold after the incubation with Ag A.…”

Section: Introductionmentioning

confidence: 99%

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Effects of sponge-derived Ageladine A on the photosynthesis of different microalgal species and strains

et al. 2020

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Fluorescent natural compounds have been identified in several marine hosts of microalgae. Their prevalence, and the energy the host is expending on their synthesis, suggests an important, yet poorly understood ecological role. It has been suggested that some of these natural products may enhance the photosynthesis of microbial symbionts. In this study, the effect of Ageladine A (Ag A), a pH-dependent fluorophore found in sponges of the genus Agelas, on the photosynthesis of nine microalgal species and strains was examined. The data showed that the variety of effects of Ag A additions differed between species, and even strains within a species. While in one strain of Synechococcus sp., the presence of Ag A increased gross photosynthesis under UV light exposure, it decreased in another. And while in the chlorophyte T. chuii overall metabolic activity was greatly reduced under all forms of lighting, photosynthesis in T. lutea was positively affected by the addition of Ag A. The variety of effects of Ag A on photosynthesis observed in this study indicate a complex interaction of Ag A with microalgal cells and suggests that a host may be able to shape its own symbiotic microbiome with self-produced natural products.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of sponge-derived Ageladine A on the photosynthesis of different microalgal species and strains

et al. 2020

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“…This principle may also apply to sponges, where light transmission modulation is known for spongin and Ageladine A (Ag A) found in sponges of the genus Agelas [14][15][16]. Ag A is a brominated pyrrole-imidazole alkaloid with different protonated states.…”

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confidence: 99%

Sponge-derived Ageladine A affects the in vivo fluorescence emission spectra of microalgae

et al. 2020

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In several marine hosts of microalgae, fluorescent natural products may play an important role. While the ecological function of these compounds is not well understood, an interaction of these molecules with the photosynthesis of the symbionts has been suggested. In this study, the effect of Ageladine A (Ag A), a pH-dependent fluorophore found in sponges of the genus Agelas, on microalgal fluorescence was examined. The spectra showed an accumulation of Ag A within the cells, but with variable impacts on fluorescence. While in two Synechococcus strains, fluorescence of phycoerythrin increased significantly, the fluorescence of other Synechococcus strains was not affected. In four out of the five eukaryote species examined, chlorophyll a (Chl a) fluorescence intensity was modulated. In Tisochrysis lutea, for example, the position of the fluorescence emission maximum of Chl a was shifted. The variety of these effects of Ag A on microalgal fluorescence suggests that fluorophores derived from animals could play a crucial role in shaping the composition of marine host/symbiont systems.

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“…The influence of UV light was evaluated by exposing the algae to UV light (wavelength: 315−400 nm) for additional 1.5 h after the normal culture condition, which was similar to previous study. [22] The cells were grown at two different CO2 levels with or without the bubbling aeration system of atmospheric CO2 level. Again, the cell number was counted at different time intervals.…”

Section: Impact Of Aiegens On the Growth Of Cyanobacteriamentioning

confidence: 99%

Boosting Algal Bloom by Five-Fold with AIEgens: Towards the Development of Biofactory

Bai¹,

Yan²,

Wong³

et al. 2020

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Human population is now faced with grand challenges such as global warming, food shortage and energy sustainability, which could be partially solved by massively increasing the growth and yield of photosynthetic organisms which capture the light energy to convert carbon dioxide and water into usable chemical energy. Cyanobacteria and eukaryotic microalgae are considered as attractive targets to be exploited by the algal factory because of their fast growth, low cost cultivation, less arable land and the diversity of high-value chemical substances produced. Many optical approaches have been introduced to increase the efficiency in artificial culturing systems, such as adding a luminescent layer that absorbs ultraviolet light and emits photosynthetic active radiation for cyanobacteria. In this work, we introduced luminogens with aggregation-induced emission characteristics (AIEgens) into the growth medium of a marine cyanobacteria. These hydrophobic AIEgens formed highly emissive luminogenic aggregates in the aqueous <a>medium and</a> dispersed around the cyanobacteria. Remarkedly, the number of cyanobacteria incubated in the medium with AIE aggregates was 5-fold more than the control group after 14-day culturing. The increased photosynthetic active radiation and the change of cyanobacteria protein expression in photosynthesis and metabolism might be the reason. Our study is the first using organic luminogenic aggregates as optical engineering inside the growth medium to dramatically increase the growth of cyanobacteria and demonstrated that AIEgens is promising technologies in the development of algal factories.

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Enhancement of photosynthesis in Synechococcus bacillaris by sponge-derived Ageladine A

Cited by 8 publications

References 42 publications

Effects of sponge-derived Ageladine A on the photosynthesis of different microalgal species and strains

Effects of sponge-derived Ageladine A on the photosynthesis of different microalgal species and strains

Sponge-derived Ageladine A affects the in vivo fluorescence emission spectra of microalgae

Boosting Algal Bloom by Five-Fold with AIEgens: Towards the Development of Biofactory

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