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  • 1
    Keywords: Plant products-Biotechnology. ; Biomass energy. ; Botany & plant sciences. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (502 pages)
    Edition: 1st ed.
    ISBN: 9789811552281
    Language: English
    Note: Intro -- Dedication -- Foreword -- Selected Publications: -- Preface -- Acknowledgments -- Contents -- Editors and Contributors -- About the Editors -- Contributors -- 1: Introduction -- 1.1 Part I: Photosynthesis and Biomass Production in a Changing World -- 1.2 Part II: Microalgae and Engineered Crops for Production of Biofuels and High-Value Products -- 1.3 Part III: Genetic Resources and Engineering Methods to Improve Crop Plants -- References -- Part I: Photosynthesis and Biomass Production Under Changing World -- 2: Climate Change: Challenges to Reduce Global Warming and Role of Biofuels -- 2.1 Introduction -- 2.2 Climate Change Mitigation -- 2.2.1 The Market Mechanisms and the Carbon Market -- 2.2.2 Carbon Capture and Storage Strategies -- 2.3 Renewable Energy Sources -- 2.3.1 Bioenergy: Biofuels -- 2.4 Biosynthetic Routes for the Production of Natural and Synthetic Fuels from Glucose -- 2.4.1 Biosynthesis of all Building Blocks -- 2.5 Energy Crops -- 2.5.1 Oilseed Crops -- 2.5.1.1 Glycerol Production and Utilization -- 2.5.2 Hydrocarbon-Yielding Crops -- 2.5.3 Halophytes for Biofuel -- 2.5.4 Fern Azolla as Biofuel -- 2.6 Lignocellulosic Feedstocks -- 2.6.1 Cocultivation Systems -- 2.7 Ethanol -- 2.7.1 Higher Alcohols -- 2.7.2 Butanol -- 2.7.2.1 Isobutanol -- 2.8 Pathways for Isoprenoid-Derived Fuels -- 2.9 Biofuels from Protein -- 2.10 Metabolic Engineering for Production of Biofuels -- 2.11 Algae-based Biofuels -- 2.12 Fourth Generation -- 2.13 Development of In Vitro (Cell-Free) Technologies -- 2.14 Direct Photosynthetic Biosynthesis of Fuels and Fuel Precursors (Algae) -- 2.15 Food vs. Fuel and Environmental Concerns -- 2.15.1 Peatlands -- 2.16 Policy Aspects of Bio-based Economy -- 2.17 Climate Action and Human Rights -- 2.18 Discussion -- 2.19 Summary -- References. , 3: The Multifaceted Connections Between Photosynthesis and Respiratory Metabolism -- 3.1 Introduction -- 3.2 The Balance Between Respiration and Photosynthesis Determining Plant Biomass Accumulation -- 3.3 On the Operation of Plant Mitochondrial Metabolism During Photosynthesis -- 3.4 Examples of Mitochondrial Manipulation that May Affect Photosynthesis: A Perspective on Current Knowledge and Future Trends -- 3.4.1 Glycolysis -- 3.4.2 TCA Cycle -- 3.4.3 Aconitase -- 3.4.4 Complex II (Succinate Dehydrogenase) -- 3.4.5 Oxoglutarate Dehydrogenase -- 3.4.6 Malate Dehydrogenase -- 3.4.7 Fumarase -- 3.4.8 Oxidative Pentose-Phosphate Pathway (OPPP) -- 3.4.9 Mitochondrial Electron Transport Chain (mETC) -- 3.4.9.1 Complex I -- 3.4.9.2 Uncoupling Protein -- 3.4.9.3 Alternative Oxidase (AOX) -- 3.4.9.4 Type II NAD(P)H Dehydrogenases (NDs) -- 3.5 Mitochondrial Metabolite Transporters -- 3.6 Advances on Photosynthetic Performance: Why Is it so Difficult to Improve? -- 3.7 Advances in Plant Light-Use Efficiency -- 3.8 The Advances in RubisCO Engineering -- 3.9 Calvin-Benson Cycle Optimization -- 3.10 Synthetic Photorespiration Bypass -- 3.11 Introducing the C4 Cycle in C3 Crops -- 3.12 Conclusion and Future Prospects -- References -- 4: Regulatory Principles of Energy Fluxes and Their Impact on Custom-Designed Plant Productivity -- 4.1 Importance of Plants for Mankind -- 4.2 Improvement of Light Usage and Assimilatory Processes -- 4.2.1 Improvement of Energy Capture and Extension of the Usable Light Spectrum -- 4.2.2 Creating an Optimal Environment for RubisCO -- 4.2.3 Avoidance of Photorespiration -- 4.3 Flexible Distribution of Energy Across Compartment Borders -- 4.3.1 Metabolite Exchange Across the Inner Chloroplast Membrane -- 4.3.2 Metabolite Exchange Across the Inner Mitochondrial Membrane -- 4.3.3 Metabolite Exchange Between Peroxisomes and Cytosol. , 4.3.4 Metabolite Exchange Across the Tonoplast -- 4.4 Protection from Oxidative Stress: Reinforcement of Antioxidants -- 4.5 Regulatory Steps (Checkpoints) in Complex Networks -- 4.6 Plants for the Production of Tailored Products -- References -- 5: Strategies to Enhance Photosynthesis for the Improvement of Crop Yields -- 5.1 Introduction -- 5.2 Manipulating Photorespiration -- 5.3 Integrating CO2-Concentrating Mechanisms into the Chloroplasts of C3 Plants -- 5.4 Challenges and Future Prospects -- References -- 6: Photosynthetic Acclimation and Adaptation to Cold Ecosystems -- 6.1 Introduction -- 6.2 Photostasis and Acclimation to Light and Low Temperature -- 6.3 Adaptations to Low Temperature -- 6.4 Photosynthetic Adaptations to Cold Ecosystems -- 6.4.1 Aquatic Ecosystems -- 6.4.1.1 Chlamydomonas sp. UWO241: A Model Green Algal System -- 6.4.1.2 Cyanobacteria -- 6.4.2 Terrestrial Plants -- 6.4.2.1 Evergreens -- 6.4.2.2 Herbaceous Plants -- 6.5 Biotechnology -- 6.6 General Summary -- 6.7 Future Directions -- References -- 7: What Is the Limiting Factor? The Key Question for Grain Yield of Maize as a Renewable Resource Under Salt Stress -- 7.1 Introduction -- 7.2 Experimental Approach to Determine Yield-Limiting Factors of Grain Maize Under Salt Stress -- 7.2.1 Plant Cultivation -- 7.2.2 Harvest -- 7.2.3 Statistical Analysis -- 7.3 Grain Yield at Maturity and Its Determinants -- 7.4 Water Consumption and Water-Use Efficiency -- 7.5 Physiologically Relevant Parameters During Kernel Setting (2 DAP) -- 7.5.1 Shoot Growth and Kernel Development -- 7.5.2 Assimilate Availability in Developing Kernels -- 7.5.3 Activity of Key Enzymes in Developing Kernels -- 7.6 Temperature Conditions During Vegetation -- 7.7 Final Evaluation of 4 Years of Container Experiments -- 7.8 Conclusions -- References. , Part II: Microalgae and Engineered Crops for Production of Biofuels and High-Value Products -- 8: Bioproduction from Microalgal Resources -- 8.1 Introduction -- 8.2 Taxonomic Distribution of Microalgae -- 8.3 Industrially Exploited Microalgae -- 8.3.1 Industrially Exploited Cyanobacteria -- 8.3.2 Industrially Exploited Green Microalgae -- 8.3.3 Industrially Exploited Heterokontophyta -- 8.3.4 Industrially Exploited Euglena -- 8.4 Microalgae Breeding to Improve Their Productivity in Biorefinery -- 8.4.1 Conventional Breeding Through Mutagenesis -- 8.4.2 Synthetic Biology of Microalgae for Biorefinery -- References -- 9: Hydrogen Photoproduction in Green Algae: Novel Insights and Future Perspectives -- 9.1 Introduction -- 9.2 Transient H2 Photoproduction During a Dark-to-Light Transition in Anaerobic Cultures -- 9.3 Different Nutrient Deprivation Protocols for H2 Photoproduction -- 9.4 Substrate Limitation of the Calvin-Benson-Bassham (CBB) Cycle -- 9.5 The Pulse-Illumination Protocol for H2 Photoproduction -- 9.6 Comparison of Different H2 Photoproduction Approaches in Terms of Light-to-Hydrogen Conversion Efficiency -- 9.7 Conclusion -- References -- 10: Synthetic Biofuels and Greenhouse Gas Mitigation -- 10.1 Introduction -- 10.2 Synthetic Biofuels -- 10.3 Sources of Biofuels -- 10.4 Types of Synthetic Biofuels -- 10.5 Bioethanol -- 10.6 Biomass-to-Liquid [BtL] Fuel -- 10.7 Production Pathways -- 10.8 Greenhouse Gas [GHG] Effect -- 10.9 Energy Consumption and Greenhouse Gas Emission -- 10.10 Gross Avoided GHG Emissions -- 10.11 Role of Biofuels in the Mitigation of Greenhouse Gases (GHGs) -- 10.12 Environmental Impact of Biofuels -- 10.13 Need for Biofuel Over Conventional Fuels in the Future -- 10.14 Challenges for the Promotion of Biofuels Over Fossil Fuels -- 10.15 Conclusion -- References. , 11: Synthetic Biology and Future Production of Biofuels and High-Value Products -- 11.1 Introduction -- 11.2 Sugar Is the Next Oil -- 11.3 Bugs to Synthetic Biofuels -- 11.3.1 Xylose Utilization -- 11.3.2 Xylose Fermenting -- 11.4 Biosynthetic Pathways of Biofuels -- 11.5 Metabolic Engineering -- 11.5.1 Lycopene -- 11.5.2 Production of Fatty Acid- and Polyketide-Derived Biofuels -- 11.5.3 Synthetic Enzymatic Pathways for the Production of High-Yield Hydrogen -- 11.5.4 Synthetic Biology Tools and Methodologies -- 11.5.5 Exploiting Diversity and Synthetic Biology for the Production of Algal Biofuels -- 11.5.6 Biofuel from Protein Sources -- 11.5.7 Metabolic Engineering in Methanotrophic Bacteria -- 11.5.8 Engineered Microbial Biofuel Production and Recovery Under Supercritical Carbon Dioxide -- 11.5.9 Solar-to-Chemical and Solar-to-Fuel Technology -- 11.5.10 Implementing CRISPR-Cas Technologies for Obtaining High-Value Products -- 11.6 Discussion -- 11.7 Conclusion -- References -- Part III: Genetic Resources and Engineering Methods to Improve Crop Plants -- 12: Kinetics Genetics and Heterosis -- 12.1 Introduction -- 12.2 The Case for an Interrelationship of QTL and Aneuploidy Dosage Effects -- 12.3 What Is the Accelerating Evidence for a Dosage Component to Heterosis? -- 12.4 Digging Up the Treasures of Old -- 12.5 Evidence from Polyploids -- 12.6 Kinetics Genetics and Heterosis -- 12.7 Will It Be Possible to Eventually Genetically Engineer Heterotic Mimics? -- References -- 13: Genome Information Resources to Improve Plant Biomass Productivity -- 13.1 Introduction -- 13.2 Information Resources in Grasses -- 13.3 Maize -- 13.4 Sugarcane -- 13.5 Sorghum -- 13.6 Switchgrass -- 13.7 Miscanthus spp. -- 13.8 Information Resources in Oil Crops -- 13.9 Soybean -- 13.10 Sunflower -- 13.11 Jatropha -- 13.12 Oil Palm -- 13.13 Conclusions and Future Perspectives. , References.
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK; Malden, USA : Munksgaard International Publishers
    Physiologia plantarum 125 (2005), S. 0 
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: We have used yeast two-hybrid screens and biochemical methods to identify glycolytic enzymes that interact with subcellular structures in hypoxic maize seedlings. As binding domain-bait fusion constructs, we have cloned actin, cytosolic aldolase, the three sucrose synthase (SUS) isoforms SUS1, SUS3, and SH1 as well as the SNF1-related protein kinase into yeast and identified cytosolic isoforms of glyceraldehyde 3-phosphate dehydrogenase (GAPDH), enolase, tubulin, and mitochondrial porin voltage-dependent anion channel protein (VDAC) as well as protein kinases and proteins involved in ubiquitinylation and proteasome-linked degradation as interacting activation domain-prey clones. The results were further confirmed using overlay blots (VDAC) as well as co-polymerization and co-precipitation assays (tubulin and actin). Some results were obtained that support the idea of metabolite and modification effects on the association, namely guanosine triphosphate (GTP)/MgCl2 was necessary for the binding of enolase to actin. GAPDH is inactivated upon association with tubulin but then serves to stabilize the microtubules. The findings support the idea of the dynamic formation of locally associated complexes of enzymes involved in sucrose breakdown and glycolysis in plant cells depending on their metabolic state.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK; Malden , USA : Munksgaard International Publishers
    Physiologia plantarum 120 (2004), S. 0 
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The redox-state is a critical determinate of cell function, and any major imbalances can cause severe damage or death. The cellular redox status therefore needs to be sensed and modulated before such imbalances occur. Various redox-active components are involved in these processes, including thioredoxins, glutaredoxins and other thiol/disulphide-containing proteins. The cellular reactions for cytoprotection and for signalling are integrated with physiological redox-reactions in photosynthesis, assimilation and respiration. They also determine the developmental fate of the cell and finally decide on proliferation or cell death. An international workshop on redox regulation, organized by the research initiative FOR 387 of the Deutsche Forschungsgemeinschaft, was held in Bielefeld, Germany in 2002. A selection of articles originating from the meeting is printed in this issue of Physiologia Plantarum.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Rapid changes of enzyme activity are obtained by post-translational modification of cysteine residues of some chloroplast enzymes. Individual fine-tuning is achieved by specific factors acting upon the redox cycle. In order to study the regulatory properties of these enzymes, they are purified from leaves or in a recombinant form from Escherichia coli. The various factors acting upon the enzyme in vivo can be simulated in vitro. However, in these studies, some subtle technical problems can be encountered. Two cases are presented in this article, and an attempt is made to explain some previous, seemingly contradictory results. The Calvin-cycle enzyme glyceraldehyde 3-phosphate dehydrogenase in its less active A8B8 form can be dissociated and thereby activated in vitro simply by diluting out the protein. On the other hand, activation requires the presence of reduced thioredoxin (Td) and an increase in ionic strength when performed at a high protein concentration, as present in vivo. Chloroplast fructose-1,6-bisphosphatase (FBPase) is purified from E. coli as an enzyme similar to that purified from leaves. However, using the standard protocol for lysis of the bacteria leads to a form with some unusual properties as changed isoelectric point, lack of Ca2+/fructose-1,6-bisphosphate (FBP) dependency of reductive activation, and lack of activity at high pH and high Mg2+ concentration. These observations are used in order to better understand the characteristics of the activation/inactivation process.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Oxford, UK; Malden , USA : Munksgaard International Publishers
    Physiologia plantarum 120 (2004), S. 0 
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: In green parts of the plant, during illumination ATP and NAD(P)H act as energy sources that are generated mainly in photosynthesis and respiration, whereas in darkness, glycolysis, respiration and the oxidative pentose-phosphate pathway (OPP) generate the required energy forms. In non-green parts, sugar oxidation in glycolysis, respiration and OPP are the only means of producing energy. For energy-consuming reactions, the delivery of NADPH, NADH, reduced ferredoxin and ATP has to take place at the required rates and in the specific compartments, since the pool sizes of these energy carriers are rather limited and, in general, they are not directly transported across biomembranes. Indirect transport of reducing equivalents can be achieved by malateoxaloacetate shuttles, involving malate dehydrogenase (MDH) for the interconversion. Isoenzymes of MDH are present in each cellular compartment. Chloroplasts contain the redox-controlled NADP-MDH that is only active in the light. In addition, a plastid NAD-MDH that is permanently active and is present in all plastid types has been found. Export of excess NAD(P)H through the malate valves will allow for the continued production of ATP (1) in photosynthesis, and (2) in oxidative phosphorylation. In the latter case, the coupled production of NADH is catalysed by the bispecific NAD(P)-GAPDH (GapAB) in chloroplasts that is active with NAD even in darkness, or by the specific plastid NAD-GAPDH (GapCp) in non-green tissues. When plants are subjected to conditions such as high light, high CO2, NH4+ nutrition, cold stress, which require changed activities of the enzymes of the malate valves, changed expression levels of the MDH isoforms can be observed. In nodules, the induction of a nodule-specific plastid NAD-MDH indicates the changed requirements for energy supply during N2 fixation. Furthermore, the induction of glucose 6-phosphate dehydrogenase isoforms by ammonium and of ferredoxin and ferredoxin-NADP reductase by nitrate has been described. All these findings are in line with the assumption that a changed redox state caused by metabolic variability leads to the induction of enzymes involved in redox poise.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Plant, cell & environment 5 (1982), S. 0 
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract. The large leaf rosettes of the so-called ‘giant rosette’ plants which inhabit the alpine region of tropical mountains are composed of a great number of adult leaves surrounding a central cone of developing leaves. Upon onset of the nocturnal frost period the adult leaves nyctinastically bend inwards and form a night-bud around the central leaf bud. The insulating effect of the night-bud was analysed in four species: Senecio keniodendron, Senecio brassica. Lobelia keniensis and Lobelia telekii which grow on Mt Kenya (Kenya). Freezing is avoided by a delay of cooling which is sufficient until rewarming by the next day's sunshine. A consequence of this delay is that the temperature in the nocturnal bud remains higher than that of the outer leaves which are often stiffly frozen after cold nights. Only one freezing point was detected on the leaf temperature recordings. Depending on the water state, the freezing points were in the range — 1°C to —4.2°C. Sucrose, amounting to 38% of the leaf dry weight, may act as a cryoprotectant for the cell membranes. Frost hardiness of the leaves, as determined with a laboratory method, was sufficient to enable the plants to survive during the nocturnal frost temperatures as measured in the field.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 71 (1987), S. 0 
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The thioredoxin-dependent light/dark modulation system of the chloroplast is described as a prerequisite enabling the flexible control of fluxes through the various parts of the CO2-fixation pathway. Both the rapid turnover of the reduced thiol-containing form of the respective target enzyme, and the metabolite effect upon the reductive enzyme modulation, allow rapid adjustment of the amount of active species to the actual requirements. The structural basis of the regulation of chloroplast NADP+-malate dehydrogenase (EC 1.1.1.82) is described in more detail. The modulable plastid enzyme is characterized by two sequence extensions not present in any other known NADP+- and/or NAD+-specific malate dehydrogenase. The NADP+-malate dehydrogenase of C3-plants is part of the “malate valve”, which catalyzes the export of reducing equivalents in the form of malate from the chloroplast only when the NADPH to NADP+ ratio is high, thus poising the NADPH to ATP ratio required for optimal carbon reduction in the light. The mode of regulation of other light/dark modulated enzymes is discussed.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Oxford, UK : Munksgaard International Publishers
    Physiologia plantarum 119 (2003), S. 0 
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: This article is an introductory synopsis of the papers on senescence and ageing, presented in this issue of Physiologia Plantarum. The major results of the individual articles have been put into contiguity and are briefly reviewed in the light of the literature. Genetically controlled processes and stochastic reactions closely interact in the course of ageing of an individual. This holds for the cells and tissues of green plants as well as for the strongly specialized heterocysts of filamentous cyanobacteria.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1432-2048
    Keywords: Amyloplast (bud) ; Brassica ; Control coefficient ; Fatty-acid synthesis ; Starch synthesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The interaction of fatty-acid synthesis with starch synthesis has been studied in intact amyloplasts isolated from floral buds of cauliflower (Brassica oleracea L.). These amyloplasts perform acetate-dependent fatty acid synthesis at maximum rates only at high external ATP concentrations. Neither pyruvate nor malate inhibit acetate-dependent fatty-acid synthesis. In contrast, acetate is inhibitory to the low pyruvate-dependent fatty acid synthesis. These observations indicate that neither pyruvate nor malate are used as natural precursors of fatty-acid synthesis. In contrast to fatty-acid synthesis, the rate of glucose-6-phosphate-dependent starch synthesis is already saturated in the presence of much lower ATP concentrations. Rising rates of starch synthesis influence negatively the process of acetate-dependent fatty acid synthesis. This inhibition appears to occur under both limiting and saturating concentrations of external ATP, indicating that the rate of ATP uptake is limiting when both biochemical pathways are active. The rate of starch synthesis is modulated specifically by the concentration of 3-phosphoglycerate in the incubation medium. This observation leads to the conclusion that the activity of ADP-glucose pyrophosphorylase is of primary importance for the control of both, starch and fatty-acid synthesis. Using the modified approach of Kacser and Burns (1973; Symp. Soc. Exp. Biol.27, 65–104) we have quantified the contribution of the rate of starch synthesis to the control of the metabolic flux through fatty-acid synthesis.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1432-2048
    Keywords: Key words:Capsicum (fruit plastids) ; Dark metabolism ; Glyceraldehyde 3-phosphate dehydrogenase ; Malate dehydrogenase ; Malate valve ; Spinacia (chloroplasts)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract. Chloroplasts isolated from spinach (Spinacia oleracea L.) leaves and green sweet-pepper (Capsicum annuum L. var. grossum (L.) Sendt.) fruits contain NADP-dependent malate dehydrogenase (MDH; EC 1.1.1.82) and the bispecific NAD(P)-glyceraldehyde 3-phosphate dehydrogenase (GAPDH; EC 1.2.1.13). The NADP-dependent MDH and GAPDH are activated in the light, and inactive in the dark. We found that chloroplasts possess additional NAD-dependent MDH activity which is, like the NAD-dependent GAPDH activity, not influenced by light. In heterotrophic chromoplasts from red sweet-pepper fruits, the NADP-dependent MDH and the NAD(P)-GAPDH isoenzymes disappear during the developmental transition and only NAD-specific isoforms are found. Spinach chloroplasts contain both NAD/H and NADP/H at significant concentrations. Measurements of the pyridine dinucleotide redox states, performed under dark and various light conditions, indicate that NAD(H) is not involved in electron flow in the light. To analyze the contribution of NAD(H)-dependent reactions during dark metabolism, plastids from spinach leaves or green and red sweet-pepper fruits were incubated with dihydroxyacetone phosphate (DHAP). Exogenously added DHAP was oxidized into 3-phosphoglycerate by all types of plastids only in the presence of oxaloacetate, but not with nitrite or in the absence of added electron acceptors. We conclude that the NAD-dependent activity of GAPDH is essential in the dark to produce the ATP required for starch metabolism; excess electrons produced during triose-phosphate oxidation can selectively be used by NAD-MDH to form malate. Thus NADPH produced independently in the oxidative pentose-phosphate pathway will remain available for reductive processes inside the plastids.
    Type of Medium: Electronic Resource
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