Distribution of enzymes related to C3 and C4 pathway of photosynthesis between mesophyll and bundle sheath cells of Panicum hians and Panicum milioides

Ku, S.B. and Edwards, G.E. and Kanai , R. (1976) Distribution of enzymes related to C3 and C4 pathway of photosynthesis between mesophyll and bundle sheath cells of Panicum hians and Panicum milioides. Plant and Cell Physiology, 17 (3). pp. 615-620.

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Abstract

Enzymes of the C4 and C3 pathways and photorespiration were analyzed for P. hians and P. milioides, which have chlorenchymatous bundle sheath cells in the leaves. On whole-leaf extracts the levels of PEP carboxylase were relatively low compared to C4 species, RuDP carboxylase is typical of C3 species, and enzymes of photorespiratory metabolism appeared somewhat intermediate between C3 and C4. Substantial levels of PEP carboxylase, RuDP carboxylase, and photorespiratory enzymes were found in both mesophyll and bundle sheath cells. Low levels of C4-acid decarboxylating enzymes may limit the capacity for C4 photosynthesis in P. hians and P. milioides. The results on enzyme activity and distribution between mesophyll and bundle sheath cells were consistent with CO2 fixation via the C3 pathway in these 2 species

Item Type: Article
Author Affiliation: Department of Horticulture, University of Wisconsin Madison, Wisconsin 53706, U.S.A.
Subjects: Plant Physiology and Biochemistry > Plant Physiology
Plant Physiology and Biochemistry > Biochemistry
Divisions: Other Crops
Depositing User: Ms K Syamalamba
Date Deposited: 19 Apr 2012 05:49
Last Modified: 19 Apr 2012 05:49
Official URL: http://pcp.oxfordjournals.org/content/17/3/615.abs...
URI: http://eprints.icrisat.ac.in/id/eprint/4849

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