25 Result(s)
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Article
Murray R Badger
English
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Article
Mehler reaction plays a role in C3 and C4 photosynthesis under shade and low CO2
Alternative electron fluxes such as the cyclic electron flux (CEF) around photosystem I (PSI) and Mehler reaction (Me) are essential for efficient photosynthesis because they generate additional ATP and protec...
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Open AccessCyclic electron flow and light partitioning between the two photosystems in leaves of plants with different functional types
Cyclic electron flow (CEF) around photosystem I (PSI) is essential for generating additional ATP and enhancing efficient photosynthesis. Accurate estimation of CEF requires knowledge of the fractions of absorb...
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Open AccessCarboxysome encapsulation of the CO2-fixing enzyme Rubisco in tobacco chloroplasts
A long-term strategy to enhance global crop photosynthesis and yield involves the introduction of cyanobacterial CO2-concentrating mechanisms (CCMs) into plant chloroplasts. Cyanobacterial CCMs enable relatively ...
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Open AccessThe combination of gas-phase fluorophore technology and automation to enable high-throughput analysis of plant respiration
Mitochondrial respiration in the dark (R dark) is a critical plant physiological process, and hence a reliable, efficient and high-throughput method of measuring variation in rates of R
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Artificial remodelling of alternative electron flow by flavodiiron proteins in Arabidopsis
In photosynthesis, linear electron transport from water to nicotinamide adenine dinucleotide phosphate (NADP+) cannot satisfy the ATP/NADPH production stoichiometry required by the Calvin–Benson cycle. Cyclic ele...
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Over-expression of the β-carboxysomal CcmM protein in Synechococcus PCC7942 reveals a tight co-regulation of carboxysomal carbonic anhydrase (CcaA) and M58 content
Carboxysomes, containing the cell’s complement of RuBisCO surrounded by a specialized protein shell, are a central component of the cyanobacterial CO2-concentrating mechanism. The ratio of two forms of the β-carb...
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The CO2-concentrating mechanism of Synechococcus WH5701 is composed of native and horizontally-acquired components
The cyanobacterial CO2-concentrating mechanism (CCM) is an effective adaptation that increases the carbon dioxide (CO2) concentration around the primary photosynthetic enzyme Ribulose-1,5-bisphosphate Carboxylase...
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Peroxisomal hydroxypyruvate reductase is not essential for photorespiration in Arabidopsis but its absence causes an increase in the stoichiometry of photorespiratory CO2 release
Recycling of carbon by the photorespiratory pathway involves enzymatic steps in the chloroplast, mitochondria, and peroxisomes. Most of these reactions are essential for plants growing under ambient CO2 concentra...
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Open AccessThe MetabolomeExpress Project: enabling web-based processing, analysis and transparent dissemination of GC/MS metabolomics datasets
Standardization of analytical approaches and reporting methods via community-wide collaboration can work synergistically with web-tool development to result in rapid community-driven expansion of online data r...
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Open AccessA rapid, non-invasive procedure for quantitative assessment of drought survival using chlorophyll fluorescence
Analysis of survival is commonly used as a means of comparing the performance of plant lines under drought. However, the assessment of plant water status during such studies typically involves detachment to es...
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Characterisation of CO2 and HCO3 − uptake in the cyanobacterium Synechocystis sp. PCC6803
The availability of a complete genome database for the cyanobacterium Synechocystissp. PCC6803 (glucose-tolerant strain) has raised expectations that this organism would become a reference strain for work aimed a...
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Increased heat sensitivity of photosynthesis in tobacco plants with reduced Rubisco activase
High temperature inhibits photosynthesis by several mechanisms including deactivation of Rubisco. The inhibition of photosynthesis by high temperature and its relationship to Rubisco deactivation was studied u...
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Reduced levels of cytochrome bf complex in transgenic tobacco leads to marked photochemical reduction of the plastoquinone pool, without significant change in acclimation to irradiance
Tobacco transgenics with decreased amounts of the FeS apoprotein were generated using an antisense RNA construct targeted against the nuclear-encoded Rieske FeS protein of cytochrome bf complex [Price et al. (...
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PsaE- and NdhF-mediated electron transport affect bicarbonate transport rather than carbon dioxide uptake in the cyanobacteriumSynechococcus sp. PCC7002
The wild-type and three deletional interposon mutants (psaE, ndhF, psaE/ndhF) ofSynechococcus sp. PCC7002 were analysed with respect to their ability to induce the CO2-concentrating mechanism (CCM). The response ...
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Reduced levels of cytochrome b 6/f in transgenic tobacco increases the excitation pressure on Photosystem II without increasing sensitivity to photoinhibition in vivo
We have examined tobacco transformed with an antisense construct against the Rieske-FeS subunit of the cytochromeb 6 f complex, containing only 15 to 20% of the wild-type level of cytochrome f. The anti-Rieske-Fe...
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Characterisation of carbon dioxide and bicarbonate transport during steady-state photosynthesis in the marine cyanobacterium Synechococcus strain PCC7002
Net O2 evolution, gross CO2 uptake and net HCO inf3 su− uptake during steady-state photosynthesis were investigated by a recently developed mass-spectrometric ...
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Article
Characterisation of inorganic carbon fluxes, carbonic anhydrase(s) and ribulose-1,5-biphosphate carboxylase-oxygenase in the green unicellular alga Coccomyxa
Processes involved in the uptake and fixation of dissolved inorganic carbon (DIC) were characterised for Coccomyxa, the green algal primary photobiont of the lichen Peltigera aphthosa and compared with the freeli...
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Specific reduction of chloroplast glyceraldehyde-3-phosphate dehydrogenase activity by antisense RNA reduces CO2 assimilation via a reduction in ribulose bisphosphate regeneration in transgenic tobacco plants
The reduction of 3-phosphoglycerate (PGA) to triose phosphate is a key step in photosynthesis linking the photochemical events of the thylakoid membranes with the carbon metabolism of the photosynthetic carbon...
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Photobiont-related differences in carbon acquisition among green-algal lichens
The photosynthetic properties of a range of lichens (eight species) containing green algal primary photobionts of either the genus Coccomyxa, Dictyochloropsis or Trebouxia were examined with the aim of obtaining ...
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Effects of inorganic carbon accumulation on photosynthetic oxygen reduction and cyclic electron flow in the cyanobacterium Synechococcus PCC7942
This paper examines the effect of inorganic carbon transport and accumulation in Synechococcus PCC7942 on fluorescence quenching, photosynthetic oxygen reduction and both linear and cyclic electron flow. The data...
