Differences in cold lability of pyruvate,Pi dikinase among C_4 species

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概要

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• The cold lability of pyruvate,Pi dikinase in crude leaf extracts was studied in a number of C_4 plants. The survey included C_4 monocots and dicots and species representing the three C_4 subgroups : NADP-malic enzyme, NAD-malic enzyme, and PEP-carboxykinase types. In some species (e.g., Digitaria sanguinalis, Sorghum bicolor and Echinochloa crus-galli), the enzyme was very sensitive to cold treatment (half life of about 8 min at O℃ and 10 to 15 min at 10℃). In other species (Panicum miliaceum, Panicum maximum and Panicum texanum), the enzyme was very cold tolerant (retention of 60 to 85% activity after 60 min at O℃ and 90% activity after 60 min at 10℃). Among the plants examined, the most cold sensitive pyruvate,Pi dikinase was found among species of the NADP-malic enzyme subgroup.

• 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

• Sugiyama T

  Department Of Agricultural Chemistry School Of Agriculture Nagoya University

• Ku S.b.

  Department Of Horticulture University Of Wisconsin

• Schmitt M.R.

  Department of Horticulture, University of Wisconsin

• Schmitt M.r.

  Department Of Horticulture University Of Wisconsin

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