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Author:
Publisher:
ISBN:
Category : Intermediates (Chemistry)
Languages : en
Pages : 12
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Book Description
Author:
Publisher:
ISBN:
Category : Intermediates (Chemistry)
Languages : en
Pages : 12
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Author: Miroslaw Krzysztof Kapuscinski
Publisher:
ISBN:
Category : Carbon
Languages : en
Pages : 342
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Book Description
Author:
Publisher:
ISBN:
Category : Photosynthesis
Languages : en
Pages : 18
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Studies of the transient changes in radiocarbon found in various photosynthetic and respiratory intermediates in Scenedesmus, which result when changing from a condition of steady-state photosynthesis in the light to dark and then back to light again, indicate the following metabolic mechanisms: (a) The carboxylation step in the carbon-reduction cycle of photosynthesis results in the formation of two molecules of 3-PGA from one RuDP molecule, one CO2, and one H2O: (b) This carboxylation reaction proceeds for about thirty seconds in the dark after the light is turned off and its rate is proportional to the falling concentration of RuDP, and stops when the latter concentration falls to zero. (c) Turning off the light results in the transfer of radiocarbon from PGA to citric acid, and glutamic acid, whereas turning on the light results in a decrease in radiocarbon in citric acid. These results provide new evidence for the theory that the oxidation of pyruvic acid to acetyl CoA and CO2 with a subsequent condensation of acetyl CoA with oxaloacetic acid to give citric acid is blocked in the light by reduction of a cofactor, which may be thioctic acid, required for pyruvic acid oxidation. (d) These transients in radioactivity found in Krebs-cycle acids are taken as evidence for the association with the chloroplast of enzymes and intermediates of the Krebs cycle.
Author: Bruce Alberts
Publisher:
ISBN: 9780815332183
Category : Cytology
Languages : en
Pages : 0
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Author: James Alan Bassham
Publisher:
ISBN:
Category : Carboxylic acids
Languages : en
Pages : 12
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Book Description
Author: Agepati S. Raghavendra
Publisher: Springer Science & Business Media
ISBN: 9048194075
Category : Science
Languages : en
Pages : 424
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Book Description
The C4 pathway of photosynthesis was discovered and characterized, more than four decades ago. Interest in C4 pathway has been sustained and has recently been boosted with the discovery of single-cell C4 photosynthesis and the successful introduction of key C4-cycle enzymes in important crops, such as rice. Further, cold-tolerant C4 plants are at the verge of intense exploitation as energy crops. Rapid and multidisciplinary progress in our understanding of C4 plants warrants a comprehensive documentation of the available literature. The book, which is a state-of-the-art overview of several basic and applied aspects of C4 plants, will not only provide a ready source of information but also triggers further research on C4 photosynthesis. Written by internationally acclaimed experts, it provides an authoritative source of progress made in our knowledge of C4 plants, with emphasis on physiology, biochemistry, molecular biology, biogeography, evolution, besides bioengineering C4 rice and biofuels. The book is an advanced level textbook for postgraduate students and a reference book for researchers in the areas of plant biology, cell biology, biotechnology, agronomy, horticulture, ecology and evolution.
Author: M. Gibbs
Publisher: Springer Science & Business Media
ISBN: 3642672426
Category : Science
Languages : en
Pages : 597
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Book Description
M. GIBBS and E. LATZKO In the preface to his Experiments upon Vegetables, INGEN-Housz wrote in 1779: "The discovery of Dr. PRIESTLEY that plants have a power of correcting bad air . . . shows . . . that the air, spoiled and rendered noxious to animals by their breath ing in it, serves to plants as a kind of nourishment. " INGEN-Housz then described his own experiments in which he established that plants absorb this "nourishment" more actively in brighter sunlight. By the turn of the eighteenth century, the "nourishment" was recognized to be CO . Photosynthetic CO2 assimilation, the 2 major subject of this encyclopedia volume, had been discovered. How plants assimilate the CO was a question several successive generations 2 of investigators were unable to answer; scientific endeavor is not a discipline in which it is easy to "put the cart before the horse". The horse, in this case, was the acquisition of radioactive isotopes of carbon, especially 14c. The cart which followed contained the Calvin cycle, formulated by CALVIN, BENSON and BASSHAM in the early 1950's after (a) their detection of glycerate-3-P as the first stable product of CO fixation, (b) their discovery, and that by HORECKER 2 and RACKER, of the COz-fixing enzyme RuBP carboxylase, and (c) the reports by GIBBS and by ARNON of an enzyme (NADP-linked GAP dehydrogenase) capable of using the reducing power made available from sunlight (via photo synthetic electron transport) to reduce the glycerate-3-P to the level of sugars.
Author: Charles Percival Whittingham
Publisher: Hodder Education
ISBN:
Category : Science
Languages : en
Pages : 146
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Book Description
Physiology of photosynthesis; Carbon metabolism; Photorespiration; The contribution of chloroplast; Excitation and fluorescence; The physiological evidence for two photochemical reactions in green plants; The comparative biochemistry of photosynthesis; Electron transport in photosynthesis.
Author: Eva-Mari Aro
Publisher: Springer Science & Business Media
ISBN: 0306481480
Category : Science
Languages : en
Pages : 624
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Book Description
This book covers the expression of photosynthesis related genes including regulation both at transcriptional and translational levels. It reviews biogenesis, turnover, and senescence of thylakoid pigment protein complexes and highlights some crucial regulatory steps in carbon metabolism.
