Limitations and prospects of natural photosynthesis for bioenergy production

Larkum, Anthony W. D.

doi:10.1016/j.copbio.2010.03.004

Cited by 125 publications

(75 citation statements)

References 62 publications

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“…Microalgae are recognised as a potential and efficient system for bio-mitigation of CO 2 from various sources like atmosphere, flue gases and chemically fixed soluble carbonates [3,4]. These photosynthetic microorganisms have high growth rates and high CO 2 fixation rates compared to slow growing conventional terrestrial and aquatic plants [4][5][6][7][8]. The biological mitigation of CO 2 is advantageous as the process of CO 2 fixation through photosynthesis leads to production of biomass energy [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

The effect of carbon dioxide rich environment on carbonic anhydrase activity, growth and metabolite production in indigenous freshwater microalgae

et al. 2015

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Section: Introductionmentioning

confidence: 99%

The effect of carbon dioxide rich environment on carbonic anhydrase activity, growth and metabolite production in indigenous freshwater microalgae

et al. 2015

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“…T he sluggish transduction of solar energy into chemical bonds through natural photosynthesis has strangled our efforts to harvest the full bounty of the sun's energy (1). We have temporarily sidestepped this limitation by tapping into large reserves of carbonaceous energy to drive an exponential growth in manufacturing, agriculture, urbanization, and population.…”

mentioning

confidence: 99%

Spectroscopic elucidation of energy transfer in hybrid inorganic–biological organisms for solar-to-chemical production

Kornienko

Sakimoto

Herlihy

et al. 2016

Proc. Natl. Acad. Sci. U.S.A.

152

126

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The rise of inorganic-biological hybrid organisms for solar-to-chemical production has spurred mechanistic investigations into the dynamics of the biotic-abiotic interface to drive the development of nextgeneration systems. The model system, Moorella thermoaceticacadmium sulfide (CdS), combines an inorganic semiconductor nanoparticle light harvester with an acetogenic bacterium to drive the photosynthetic reduction of CO 2 to acetic acid with high efficiency. In this work, we report insights into this unique electrotrophic behavior and propose a charge-transfer mechanism from CdS to M. thermoacetica. Transient absorption (TA) spectroscopy revealed that photoexcited electron transfer rates increase with increasing hydrogenase (H 2 ase) enzyme activity. On the same time scale as the TA spectroscopy, time-resolved infrared (TRIR) spectroscopy showed spectral changes in the 1,700-1,900-cm −1 spectral region. The quantum efficiency of this system for photosynthetic acetic acid generation also increased with increasing H 2 ase activity and shorter carrier lifetimes when averaged over the first 24 h of photosynthesis. However, within the initial 3 h of photosynthesis, the rate followed an opposite trend: The bacteria with the lowest H 2 ase activity photosynthesized acetic acid the fastest. These results suggest a two-pathway mechanism: a high quantum efficiency charge-transfer pathway to H 2 ase generating H 2 as a molecular intermediate that dominates at long time scales (24 h), and a direct energy-transducing enzymatic pathway responsible for acetic acid production at short time scales (3 h). This work represents a promising platform to utilize conventional spectroscopic methodology to extract insights from more complex biotic-abiotic hybrid systems.energy conversion | spectroscopy | CO 2 reduction | biohybrid systems | catalysis

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“…One of the key issues that many people are considering is the overall efficiency of the photosynthetic apparatus of different microorganisms for capturing the total photon energy available in a given area of irradiation. The review by Larkum [21] provides a useful overview of this concept.…”

Section: Fuels From Phototrophsmentioning

confidence: 99%

Engineering microbes to produce biofuels

Wackett

2011

Current Opinion in Biotechnology

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Limitations and prospects of natural photosynthesis for bioenergy production

Cited by 125 publications

References 62 publications

The effect of carbon dioxide rich environment on carbonic anhydrase activity, growth and metabolite production in indigenous freshwater microalgae

The effect of carbon dioxide rich environment on carbonic anhydrase activity, growth and metabolite production in indigenous freshwater microalgae

Spectroscopic elucidation of energy transfer in hybrid inorganic–biological organisms for solar-to-chemical production

Engineering microbes to produce biofuels

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