Variation in the Accumulation of Seed Storage Protein Among Genotypes of Phaseolus vulgaris (L.)

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Abstract
Differences in the accumulation of total seed protein and globulin-1 (G1) protein were detected among 3 inbred lines of the common bean. Total protein accumulation ranged from 2.3-3.7 mg/cotyledon pair per day among lines. In all lines, the dry weight and protein accumulation ceased and a loss of chlorophyll in the cotyledons occurred when the moisture content had fallen to 50% of fresh weight. G1 was first detected and rapid accumulation began 14 days after flowering in 2 lines, in cv. Endogava zurundi namame, rapid accumulation was delayed until 20 days after flowering. Rates of G1 accumulation ranged 1.0-1.8 mg G1/cotyledon pair per day among lines. G1 accumulation ceased 6 days before the end of total protein accumulation in Sanilac. A steady rate of protein accumulation was observed in Sanilac, but pauses in the accumulation of G1 and of total protein were documented in ''Endogava zurundi namame''. The rate of G1 accumulation preceding and following the pause in ''Endogava zurundi namame'' was 2.7 mg G1/cotyledon pair per day, nearly double that of the other lines.