PMID: 4292834Jun 1, 1967Paper

Comparative studies on the activity of carboxylases and other enzymes in relation to the new pathway of photosynthetic carbon dioxide fixation in tropical grasses

The Biochemical Journal
C R Slack, M D Hatch

Abstract

1. The activity per unit of chlorophyll of certain carboxylases, and of other enzymes involved in photosynthesis, was determined in leaf extracts of the tropical grasses, sugar-cane, maize and sorghum, and compared with the activities for wheat, oat and silver-beet. Maximum rates of photosynthetic carbon dioxide uptake were also measured for comparison with enzyme activities. 2. Phosphopyruvate carboxylase activity was about 60 times greater in the tropical grasses than in wheat, oat and silver-beet and was severalfold higher than the rates of photosynthetic carbon dioxide uptake. Most of the enzyme was located in the chloroplast fraction of cell extracts. 3. Phosphopyruvate carboxylase was apparently the major photosynthetic carbon dioxide-fixing enzyme in the tropical grasses, although malic enzyme may contribute to a lesser extent. 4. Tropical grasses contained less than one-tenth of the ribulose diphosphate carboxylase activity present in wheat, oat and silver-beet. For the tropical grasses this activity, determined with a saturating concentration of bicarbonate, was approx. 10% of the rate of photosynthesis. 5. The fraction-1 protein content of leaf extracts paralleled the ribulose diphosphate carboxylase activity. 6. In c...Continue Reading

Citations

Apr 10, 2016·Journal of Experimental Botany·Robert T Furbank
Jan 23, 2017·Journal of Experimental Botany·Robert T Furbank
May 11, 2005·Trends in Plant Science·Naomi J BrownJulian M Hibberd
Dec 19, 1969·Annals of the New York Academy of Sciences·N E Tolbert, R K Yamazaki
Oct 15, 1971·Biochemical and Biophysical Research Communications·G E EdwardsC C Black
Mar 12, 1968·Biochemical and Biophysical Research Communications·C R Slack
Nov 20, 1969·Biochemical and Biophysical Research Communications·C W BaldryJ Coombs
Mar 1, 1995·Plant Molecular Biology·S UsamiJ N Burnell
Mar 1, 1971·Planta·A D Hanson, J Edelman
Nov 1, 1975·European Journal of Biochemistry·V Kagan-Zur, S H Lips
Feb 1, 1969·Biological Reviews of the Cambridge Philosophical Society·D SmithD Lewis
Oct 8, 1997·Journal of Molecular Evolution·S Alberti
Jan 20, 2019·Biotechnology and Bioengineering·Aleksey BychkovOleg Lomovsky
Sep 22, 2011·Wiley Interdisciplinary Reviews. RNA·Niles Lehman
Dec 19, 2008·Biological Chemistry·Karel MüllerHelena Ryslavá
Jun 25, 2013·Photosynthesis Research·Sarah CovshoffBritta M C Kümpers
Dec 10, 2013·Journal of Applied Microbiology·L De VuystF Leroy
Jul 3, 2019·American Journal of Physiology. Endocrinology and Metabolism·Rita BasuAnanda Basu

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