Potassium deficiency, a “smart” cellular switch for sustained high yield hydrogen production by the green alga Scenedesmus obliquus

Papazi, Aikaterini; Gjindali, Armida-Irene; Kastanaki, Elizabeth; Assimakopoulos, Konstantinos; Stamatakis, Konstantinos; Kotzabasis, Kiriakos

doi:10.1016/j.ijhydene.2014.09.096

Cited by 32 publications

(23 citation statements)

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“…Among several biotechnological approaches for Photosynth Res hydrogen production, light-driven hydrogen evolution carried out by green microalgae has been intensively investigated over the last decade. The unicellular green alga Chlamydomonas is considered as one of the most promising eukaryotic hydrogen producers, although Chlorella and Scenedesmus, including marine species, are also able to sustain hydrogen production in the light under certain conditions (Schulz et al 1998;He et al 2012;Rashid et al 2013;Papazi et al 2014;Batyrova et al 2015).…”

Section: Advances and Perspectives Of Hydrogen Photoproduction By Grementioning

confidence: 99%

“…Although S-deprivation is considered as a basic method to sustain hydrogen photoproduction in green algae, recently many attempts have been made to test depletions on other important nutrients, including nitrogen, phosphorus, magnesium, and potassium (Philipps et al 2011;Batyrova et al 2012Batyrova et al , 2015He et al 2012;Papazi et al 2014;Volgusheva et al 2015). As shown by Philipps et al (2011), metabolic modifications observed upon nitrogen limitation in C. reinhardtii qualitatively resemble those evoked by sulfur deficit, although each type of depletion induces nutrient-specific physiological responses.…”

Section: Advances and Perspectives Of Hydrogen Photoproduction By Grementioning

confidence: 99%

“…Recently Papazi et al (2014) tested effects of different nutrient-depletion protocols on hydrogen production by a mixotrophic Scenedesmus obliguus culture supplied with exogenous glucose, and found that the highest yields are attained upon potassium depletion. The authors suggested that this effect might be related to potassium-dependent disturbance of conversion of glucose to starch in the chloroplast.…”

Section: Advances and Perspectives Of Hydrogen Photoproduction By Grementioning

confidence: 99%

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Multiple regulatory mechanisms in the chloroplast of green algae: relation to hydrogen production

2015

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A complex regulatory network in the chloroplast of green algae provides an efficient tool for maintenance of energy and redox balance in the cell under aerobic and anaerobic conditions. In this review, we discuss the structural and functional organizations of electron transport pathways in the chloroplast, and regulation of photosynthesis in the green microalga Chlamydomonas reinhardtii. The focus is on the regulatory mechanisms induced in response to nutrient deficiency stress and anoxia and especially on the role of a hydrogenase-mediated reaction in adaptation to highly reducing conditions and ATP deficiency in the cell.

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Section: Advances and Perspectives Of Hydrogen Photoproduction By Grementioning

confidence: 99%

Section: Advances and Perspectives Of Hydrogen Photoproduction By Grementioning

confidence: 99%

Section: Advances and Perspectives Of Hydrogen Photoproduction By Grementioning

confidence: 99%

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Multiple regulatory mechanisms in the chloroplast of green algae: relation to hydrogen production

2015

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“…Other than S-deprivation, phosphorous [82]; nitrogen [69]; or potassium depleted media [83] were also effective in achieving a sustainable hydrogen photoproduction. The Pdeprivation method was reported to be a suitable alternative to the S-deprivation, when a high sulfate concentration would be difficult to avoid from natural growth media, as the case would be with brackish and seawater cultures.…”

Section: Metabolic Manipulationsmentioning

confidence: 99%

Microalgal hydrogen production research

Eroğlu

Melis

2016

International Journal of Hydrogen Energy

127

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Available online xxxKeywords: Photobiological hydrogen Microalgae Metabolic engineering Cellular immobilization Integrated bioprocess Photobioreactor a b s t r a c tMicroorganisms can produce hydrogen biologically, with species ranging from photosynthetic and fermentative bacteria to green microalgae and cyanobacteria. In comparison with the conventional chemical or physical hydrogen production methods, biological processes demonstrate several advantages by operating at ambient pressure and temperature conditions, without a requirement for the use of precious metals to catalyze the reactions. In addition to using cellular endogenous substrate from which to extract electrons for H 2 -production, a number of green microalgae are also endowed with the photosynthetic machinery needed to extract electrons from water, the potential energy of which is elevated by two photochemical reactions prior to reducing protons (H þ ) for the generation of molecular hydrogen (H 2 ). Sunlight provides the energy for the microalgal overall strongly endergonic reaction of H 2 O-oxidation, electron-transport, and H 2 -production.Thanks to a substantial amount of research, a number of diverse experimental approaches have been developed and applied to establish and improve sustainable production of hydrogen. This review summarizes and updates recent developments in microalgal hydrogen production research with emphasis on new trends and novel ideas practiced in this field.

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“…Media depleted in some elements, in addition to S, P, N, and Mg, have been studied in the context of H 2 production in the alga Scenedesmus obliquus (Papazi et al 2014). From all the elements under study, potassium (K) deficiency leads to the highest H 2 production.…”

Section: Other Nutrient Deficienciesmentioning

confidence: 99%

Relevance of nutrient media composition for hydrogen production in Chlamydomonas

2015

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Microalgae are capable of biological H2 photoproduction from water, solar energy, and a variety of organic substrates. Acclimation responses to different nutrient regimes finely control photosynthetic activity and can influence H2 production. Hence, nutrient stresses are an interesting scenario to study H2 production in photosynthetic organisms. In this review, we mainly focus on the H2-production mechanisms in Chlamydomonas reinhardtii and the physiological relevance of the nutrient media composition when producing H2.

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Potassium deficiency, a “smart” cellular switch for sustained high yield hydrogen production by the green alga Scenedesmus obliquus

Cited by 32 publications

References 50 publications

Multiple regulatory mechanisms in the chloroplast of green algae: relation to hydrogen production

Multiple regulatory mechanisms in the chloroplast of green algae: relation to hydrogen production

Microalgal hydrogen production research

Relevance of nutrient media composition for hydrogen production in Chlamydomonas

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