Variations in the Contents and Kinetic Properties of Ribulose-1,5-bisphosphate Carboxylases among Rice Species

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概要

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• The K_m(CO_2) and V_<max> of ribulose 1,5-bisphosphate (RuBP) carboxylase and its protein ratio to total soluble protein from Oryza species including cuiltivars (25 varieties) and wild types (11 species, 21 strains) were surveyed. Their variabilities among cultivars of O. sativa were very small. The averages of the K_m(CO_2) and V_<max> values and the ratio of carboxylase to soluble protein, and their standard errors were 10.2±1.0 μM, 1.72±0.13 units・mg^<-1> (pH 8.0 and 25℃) and 52±2%, respectively. However, some differences seemed to exist based on genome constitution in the Oryza genus. RuBP carboxylases from the species with the A^gA^g genome, O. graberrima and O. breviligulate, exhibited low K_m(CO_2) values (8.0±0.8 μM). High V_<max> was associated with the CC genome, O. eichingeri and O. officinalis (2.08±0.15 units・mg^<-1>). A higher ratio of RuBP carboxylase protein to soluble protein was found for the AA genome, O. sativa and O. perennis.

• 日本植物生理学会の論文

著者

• Ohira Koji

  Department Of Agricultural Chemistry Tohoku University

• Ohira Koji

  Department Of Agricultural Chemistry Faculty Of Agriculture Tohoku University

• Mae Tadahiko

  Department of Agricultural Chemistry, Tohoku University

• Mae Tadahiko

  Tohoku Univ. Sendai Jpn

• MAKINO Amane

  Department of Applied Biological Chemistry, Faculty of Agriculture, Tohoku University

• Ohira Koji

  Department Of Agricultural Cheimistry Faculty Of Agriculture Tohoku University

• Mae Tadahiko

  Department Of Agricultural Chemistry Faculty Of Agriculture

• MAKINO Amane

  Department of Agriculture, Graduate School of Agricultural Science, Tohoku University:CREST, JST

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