Distribution of enzymes related to C_3 and C_4 pathway of photosynthesis between mesophyll and bundle sheath cells of Panicum hians and Panicum milioides

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概要

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• Enzymes of the C_4, C_3 pathway and photorespiration have been 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 are relatively low compared to C_4 species, RuDP carboxylase is typical of C_3 species, and enzymes of photorespiratory metabolism appear somewhat intermediate between C_3 and C_4. Substantial levels of PEP carboxylase, RuDP carboxylase, and photorespiratory enzymes were found in both mesophyll and bundle sheath cells. Low levels of C_4-acid decarboxylating enzymes may limit the capacity for C_4 photosynthesis in P. hians and P. milioides. The results on enzyme activity and distribution between mesophyll and bundle sheath cells are consistent with CO_2 fixation via C_3 pathway in these two species.

• 日本植物生理学会の論文

著者

• Edwards G.e.

  Department Of Botany Washington State University:institute Of Biological Chemistry Washington State

• Edwards G.e.

  Department Of Horticulture University Of Wisconsin

• Ku S.B.

  Department of Horticulture, University of Wisconsin

• Kanai R.

  Department of Biochemistry, Saitama University

• Ku S.b.

  Department Of Horticulture University Of Wisconsin

関連論文

• Distribution of enzymes related to C_3 and C_4 pathway of photosynthesis between mesophyll and bundle sheath cells of Panicum hians and Panicum milioides
• Photosynthetic Characteristics of C_3-C_4 Intermediate Flaveria Species II. : Kinetic Properties of Phosphoenolpyruvate Carboxylase from C_3-C_4 and C_3-C_4 Intermediate Species
• Differences in cold lability of pyruvate,Pi dikinase among C_4 species
• Photosynthetic efficiency of Panicum hians and Panicum milioides in relation to C_3 and C_4 plants
• Glycolate synthesis in a C_3, C_4 and intermediate photosynthetic plant type
• Use of inhibitors to distinguish between C_4 acid decarboxylation mechanisms in bundle sheath cells of C_4 plants
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