Results 171 to 180 of about 9,866 (218)

Oligomeric enzymes in the C4 pathway of photosynthesis

Photosynthesis Research, 1990
This review deals with the factors controlling the aggregation-state of several enzymes involved in C4 photosynthesis, namely phosphoenolpyruvate carboxylase, NAD-and NADP-malic enzyme, NADP-malic dehydrogenase and pyruvate, phosphate dikinase and its regulatory protein.
F E, Podesta, A A, Iglesias, C S, Andreo
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Mutants of C4 Photosynthesis

1998
The method of screening for mutants was based on that originally described by Somerville and Ogren, who isolated a range of mutants of Arabidopsis thaliana (1) that lacked key enzymes of the photorespiratory carbon and nitrogen cycle (2). Somerville and Ogren argued that in C3 plants grown at elevated concentrations of CO2 glycollate-2-P formation ...
Leegood, R. C., Bailey, K. J., Ireland, R. J., Dever, L. V., Lea, P. J.   +4 more
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Mitochondria as a site of C4 acid decarboxylation in C4-pathway photosynthesis

Archives of Biochemistry and Biophysics, 1975
Abstract One group of C4, species utilize a NAD-malic enzyme to decarboxylate C4 acids. This enzyme, together with a major isoenzyme of aspartate aminotransferase and a NAD-malate dehydrogenase, is localized in the mitochondria of the bundle sheath cells and the following pathway for C4, acid decarboxylation has been proposed: aspartate ...
T, Kagawa, M D, Hatch
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C4 photosynthesis in the vegetation of Aldabra Atoll

Oecologia, 1979
The occurrence of the C4 photosynthetic system, based upon an examination of leaf anatomy, of nearly all species of the vegetation of Aldabra Atoll, western Indian Ocean, is reported. About 19% of the flora has the C4 system. It only occurs in herbaceous plants, which grow either in grasslands or as an understorey to tall shrubs. Both C3 and C4 species
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The Regulation of C4 Photosynthesis

1997
Publisher Summary The C4 pathway is an adjunct to the Benson–Calvin cycle. It occurs only in conjunction with structural modifications that allow it to operate as a CO2–concentrating mechanism and, therefore, to suppress photorespiration.
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The Physiological Ecology of C4 Photosynthesis

2000
C4 photosynthesis is an evolutionary syndrome that concentrates CO2 around Rubisco and in so doing reduces photorespiratory inhibition of photosynthesis to negligible levels. It is not a single pathway, but a syndrome of functionally similar modifications that utilize phosphoenolpyruvate carboxylation in mesophyll cells, and transport of four-carbon ...
Rowan F. Sage, Robert W. Pearcy
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Developmental Aspects of C4 Photosynthesis

2000
Development of a fully functional C4 leaf requires modification of the C3 ground state at several hierarchical levels, including vein spacingin whole leaves, cell division and cell enlarge ment patterns within the photosynthetic tissue precursors, ultrastructural changes in bundle sheath (BS) and mesophyll (M) cells, and regulation of gene expression ...
Nancy G. Dengler, William C. Taylor
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Compartmentation and Transport in C4 Photosynthesis

1976
The C4 dicarboxylic acid pathway of photosynthetic carbon assimilation (the C4 pathway) is a complex biochemical and physiological elaboration of the common photosynthetic carbon reduction cycle (PCR cycle, C3 pathway; Bassham and Calvin, 1962). We define the C4 pathway as the complete reaction sequence in which CO2 is transferred via the C-4 carboxyl ...
M. D. Hatch, C. B. Osmond
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C4 Photosynthesis: Mechanism and Regulation

2000
The C4 photosynthetic process is a combination of biochemical, anatomical and genetic specialization which concentrates CO2 at the site of carbon fixation, ribulose-1,5-bisphosphate carboxylase/oxygenase. This essentially suppresses photorespiration and allows carbon fixation to proceed at near CO2 saturation.
Robert T. Furbank, Marshall D. Hatch, Colin L. D. Jenkins   +2 more
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Single-cell C4 Photosynthesis

2021
Tek hücre C4 fotosentezi moleküler, biyokimyasal, anatomik özelliklerin bir bütünüdür. C4 fotosentezinin yaklaşık 25-30 milyon önce Oligosen’de CO2 seviyesindeki azalmaya bağlı olarak ortaya çıktığı tahmin edilmektedir. Yüksek yapılı bitkilerde, yüksek sıcaklıklarda fotosentezin verimliliği, Rubisco (Ribuloz 1,5 bisfosfat karboksilaz/oksijenaz ...
ÇÖKMEZ, Buse, ÖZDENER KÖMPE, Yasemin, ÖZEN, Fazıl   +2 more
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