Oxygenic Photosynthesis in Algae and Cyanobacteria: Electron Transfer in Photosystems I and II

Nugent, Jonathan H. A.; Purton, Saul; Evans, M.C.W.

doi:10.1007/978-94-007-1038-2_7

Cited by 10 publications

(10 citation statements)

References 146 publications

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“…42, 60 The assimilation of inorganic carbon, on the other hand, requires both ATP and NADPH produced by non-cyclic electron flow and involves both PSII and PSI activity. 61 Thus UV-B affected carbon assimilation but not CCM activity, leading to higher internal CO 2 pools under UV-B exposure 41 than under non-photoinhibitory PAR exposure. Similarly, Song and Qiu 62 observed that the rate of total inorganic carbon uptake in the freshwater cyanobacterium Microcystis aeruginosa was only marginally affected by UV-B, but the effects were different on various inorganic carbon transporters.…”

Section: Interactions Between Uvr and Elevated Co 2 In Marine Primary...mentioning

confidence: 92%

Interactions between the impacts of ultraviolet radiation, elevated CO2, and nutrient limitation on marine primary producers

Beardall

Sobrino

Stojkovic

2009

Photochem Photobiol Sci

107

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It is well known that UV radiation can cause deleterious effects to the physiological performance, growth and species assemblages of marine primary producers. In this review we describe the range of interactions observed between these impacts of ultraviolet radiation (UVR, 280-400 nm) with other environmental factors such as the availability of photosynthetically active radiation (PAR), nutrient status and levels of dissolved CO2, all of which can, in turn, be influenced by global climate change. Thus, increases in CO2 levels can affect the sensitivity of some species to UV-B radiation (UV-B), while others show no such impact on UV-B susceptibility. Both nitrogen- and phosphorus-limitation can have direct interactive effects on the susceptibility of algal cells and communities to UVR, though such effects are somewhat variable. Nutrient depletion can also potentially lead to a dominance of smaller celled species, which may be less able to screen out and are thus likely to be more susceptible to UVR-induced damage. The variability of responses to such interactions can lead to alterations in the species composition of algal assemblages.

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Section: Interactions Between Uvr and Elevated Co 2 In Marine Primary...mentioning

confidence: 92%

Interactions between the impacts of ultraviolet radiation, elevated CO2, and nutrient limitation on marine primary producers

Beardall

Sobrino

Stojkovic

2009

Photochem Photobiol Sci

107

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“…UVB was reported to damage photosystem II in which ATP was derived from cyclic photophosphorylation driven by electron transport, and thus led to higher internal CO 2 pool than non‐photoinhibitory PAR or UVA stress (Nugent et al . ). The photoinhibition due to UVB‐induced D1 protein damage in photosystem II was also observed (Aro et al .…”

Section: Discussionmentioning

confidence: 97%

“…However, in this study, the presence of UVA resulted in insignificant effect on the photosynthesis of G. lemaneiformis, the inhibition was mainly attributed to UVB (Michler et al 2002) by an amount of 2.4 times that of UVA. UVB was reported to damage photosystem II in which ATP was derived from cyclic photophosphorylation driven by electron transport, and thus led to higher internal CO2 pool than non-photoinhibitory PAR or UVA stress (Nugent et al 2003). The photoinhibition due to UVB-induced D1 protein damage in photosystem II was also observed (Aro et al 1990).…”

Section: Discussionmentioning

confidence: 97%

Combined effects of light and nitrate supplies on the growth, photosynthesis and ultraviolet‐absorbing compounds in marine macroalga Gracilaria lemaneiformis (Rhodophyta), with special reference to the effects of solar ultraviolet radiation

Zheng

2013

Phycological Research

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Summary It is well known that light and nutrients are essential to plants; however, there are few investigations in which these have been studied in combination on macroalgae, especially when solar ultraviolet radiation (UVR) is concerned. We cultured the red alga Gracilaria lemaneiformis (Bory) at different nitrate concentrations and light levels with or without UVR for 24 days. The results showed that nitrate supply markedly enhanced the growth and photosynthesis, increased the absorptivity of UV‐absorbing compounds (UVACs), and decreased photoinhibition in the presence of UVR. The thalli that received photosynthetically active radiation (PAR) treatment exhibited higher growth rates than those that received PAR + UVR at ambient or enhanced nitrate concentrations. However, under PAR + UVR treatment, the absorptivity of UVACs was higher than that of PAR and fluctuated with light levels. UVR was found to reduce the maximal net photosynthetic rate, apparent photosynthetic efficiency and light‐saturating irradiance while increasing the dark respiration rate, and inducing higher inhibition of growth and photosynthesis under high light versus under low light. Ultraviolet B significantly induced the synthesis of UVACs but led to higher inhibition on growth and photosynthesis than ultraviolet A.

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“…If this critical conclusion is settled, it will definitely refine knowledge on the aggregation state of PS II complexes in red algae as well as in cyanobacteria, and all hypotheses based on the dimeric form of PS II need to be re-checked. The composition of PS II in red algae is similar to that of higher plants and cyanobacteria, and the major reaction center polypeptides, D1, D2, CP43, and CP47 (Nugent et al 2003), can all be found in the red algae PS II (Enami et al 1995;Gao et al 2004Gao et al , 2008Wolfe et al 1994a). The genes encoding these polypeptides are all located in the red algal chloroplast genome (Table 4).…”

Section: Composition and Morphology Of Pbsmentioning

confidence: 94%

“…The EM results showed that the red algal PS I exists in a monomer form (Gardian et al 2007), differing greatly from cyanobacteria in which PS I aggregated as a trimer (Jordan et al 2001). PS I particles showed a roughly spherical shape in top view, and their Alternative names are referred to Nugent et al (2003). Sequences are searched from either NCBI protein database or downloaded genome data.…”

Section: Composition and Morphology Of Pbsmentioning

confidence: 99%

The supramolecular architecture, function, and regulation of thylakoid membranes in red algae: an overview

Xie

Zhang

et al. 2010

Photosynth Res

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Red algae are a group of eukaryotic photosynthetic organisms. Phycobilisomes (PBSs), which are composed of various types of phycobiliproteins and linker polypeptides, are the main light-harvesting antennae in red algae, as in cyanobacteria. Two morphological types of PBSs, hemispherical- and hemidiscoidal-shaped, are found in different red algae species. PBSs harvest solar energy and efficiently transfer it to photosystem II (PS II) and finally to photosystem I (PS I). The PS I of red algae uses light-harvesting complex of PS I (LHC I) as a light-harvesting antennae, which is phylogenetically related to the LHC I found in higher plants. PBSs, PS II, and PS I are all distributed throughout the entire thylakoid membrane, a pattern that is different from the one found in higher plants. Photosynthesis processes, especially those of the light reactions, are carried out by the supramolecular complexes located in/on the thylakoid membranes. Here, the supramolecular architecture, function and regulation of thylakoid membranes in red algal are reviewed.

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Oxygenic Photosynthesis in Algae and Cyanobacteria: Electron Transfer in Photosystems I and II

Cited by 10 publications

References 146 publications

Interactions between the impacts of ultraviolet radiation, elevated CO2, and nutrient limitation on marine primary producers

Interactions between the impacts of ultraviolet radiation, elevated CO2, and nutrient limitation on marine primary producers

Combined effects of light and nitrate supplies on the growth, photosynthesis and ultraviolet‐absorbing compounds in marine macroalga Gracilaria lemaneiformis (Rhodophyta), with special reference to the effects of solar ultraviolet radiation

The supramolecular architecture, function, and regulation of thylakoid membranes in red algae: an overview

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