Variation in Ribulose 1,5 Bisphosphate Carboxylase Content in a Range of Winter Wheat Genotypes

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Abstract
Pyke, K A. and Leech, R. M. 1985. Variation in nbulose 1, 5 bisphosphate carboxylase content in a range of winter wheat genotypes. J. exp. Bot. 36: 1523–1529. Amounts of ribulose 1, 5 bisphosphate carboxylase (RuBPCase; E.C 4.1.1.39) were measured in the first leaves of 14 hexaploid wheat genotypes. The genotypes were representative of winter wheat grown in Britain during the past 150 years. The highest levels of RuBPCase per unit leaf area were found in semi-dwarf genotypes which had more mesophyll cells per unit leaf area and smaller cells than tall genotypes. There was no significant correlation relating the year of introduction of genotypes to either the amount of RuBPCase per leaf or the amount per mesophyll cell Semi-dwarf genotypes tended to have smaller leaves and were less variable. Genotypic variation in the cellular content of RuBPCase is discussed in terms of genotypic differences in leaf development and the potential for maximal RuBPCase accumulation.