34 Result(s)
within
Murray R Badger
English
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Article
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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Article
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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Article
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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Article
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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Article
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...
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Article
Evidence for the functioning of photosynthetic CO2-concentrating mechanisms in lichens containing green algal and cyanobacterial photobionts
The photosynthetic properties of a range of lichens containing both green algal (11 species) and cyanobacterial (6 species) photobionts were examined with the aim of determining if there was clear evidence for...
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Chapter
Rubisco: Subunits and Mechanism
D-ribulose-l,5-bisphosphate (ribulose-P2) carboxylase-oxygenase (Rubisco) catalyses the initial reactions of the photosynthetic carbon reduction cycle and its photorespiratory appendage, the glycolate pathway, in...
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Article
The relationship between steady-state gas exchange of bean leaves and the levels of carbon-reduction-cycle intermediates
The relationship between the gas-exchange characteristics of attached leaves of Phaseolus vulgaris L. and the pool sizes of several carbon-reduction-cycle intermediates was examined. After determining the rate of...
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Chapter
Factors Limiting Photosynthesis as Determined from Gas Exchange Characteristics and Metabolite Pool Sizes
This paper describes studies we have undertaken to extend our knowledge of rate limitations to photosynthesis at the level of organization of the leaf. The ultimate aim of this research is to determine those p...
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Article
Effects of water stress on photosynthetic electron transport, photophosphorylation, and metabolite levels of Xanthium strumarium mesophyll cells
Several component processes of photosynthesis were measured in osmotically stressed mesophyll cells of Xanthium strumarium L. The ribulose-1,5-bisphosphate regeneration capacity was reduced by water stress. Photo...
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Article
Molecular weight and quaternary structure of ribulose bisphosphate carboxylase from the cyanobacterium, Synechococcus sp.
Ribulose bisphosphate (RuP2) carboxylase from the marme cyanobacterium, Synechococcus sp., comprised both large (57,000 dalton) and small (12,000 dalton) subunits. The undissociated, purified enzyme was considera...
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Article
Photosynthesis and the intracellular inorganic carbon pool in the bluegreen alga Anabaena variabilis: Response to external CO2 concentration
The apparent photosynthetic affinity of A. variabilis to CO2 is greatly affected by the CO2 concentration in the medium during growth. Halfmaximal rate of photosynthetic O2 evolution is achieved at 10 μM and 100 ...
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Chapter
The Activation of Ribulose 1,5-Bisphosphate Carboxylase/Oxygenase
A long-standing and continuing problem concerning ribulose bisphosphate carboxylase/oxygenase is the discrepancy between its activity in vivo and in vitro (1, 2). The apparently low affinity of th...
