Handbook of Plant and Crop Physiology

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14 Bioenergetic Aspects of Photosynthetic Gas Exchange and Respiratory Processes in Algae and Plants Klaus Peter Bader Universit ...

progen oxidative decarboxylase only in the presence of oxygen [1]! Moreover, it has been stated that the oxidation of water in p ...

spheric oxygen to the OEC with the subsequent formation of a peroxidic component might well represent such a regulatory mechanis ...

gin of the evolved oxygen in the case of oxygenic photosynthesis. In the early phases of photosynthesis research, it was not obv ...

nism have been worked out and published. Figure 2 depicts a “heterologous” fusion model of ancestral forms of anoxygenic types o ...

plastoquinone pool (PQ/PQH 2 ) and plastocyanin (PC), respectively. The proton gradient that is built up during a light phase “d ...

lution pattern is rapidly damped out because of three transition parameters, ,, and .means that a single reaction center does ...

It is clear that photosynthetic water oxidation also includes the liberation of protons. These pro- tons, however, do not necess ...

of specific amino acids. The reaction rate of the proton release strongly depended on the redox condi- tions as well as on the p ...

308 BADER AND ABDEL-BASSET Figure 9 Mass spectrometric analysis of the photosynthetic oxygen evolution in Oscillatoria chalybeaa ...

III. RESPIRATORY PROCESSES A. Dark Respiration In general terms, the expression “dark respiration” might mean any plant physiolo ...

heat energy than is produced by the cytochrome pathway, which generates more ATP. Generally, changes in heat development are inc ...

ammonia, which cannot easily be taken as a measure for photorespiratory activity as NH 3 (for reasons of both bioenergetic econo ...

area was increased by 20–30% in plants exposed to doubling of the ambient CO 2 concentration [60,63]. Moreover, elevated CO 2 tr ...

O 2 , becoming similar to that of C3 plants [59]. Therefore, the higher O 2 requirement for optimal C4 pho- tosynthesis must be ...

dynamic method assumes that maintenance respiration is represented by the dark CO 2 efflux when the net daytime uptake is zero. ...

sylvestrisL.) branches subject to abscission was analyzed for a cost-benefit approach [92]. All but one of the branches studied ...

change in the presence of (normal) H 216 O substrate water and^18 O 2 in an artificial gas atmosphere [108]. Upon illumination w ...

tion of PQ by reduction equivalents from the stroma. High amounts of accumulated starch were observed in transformants with dele ...