Genetic regulation of storage protein content in maize endosperm (original) (raw)

Abstract

Sodium dodecylsulfate-polyacrylamide gel electrophoresis reveals that zein prepared from normal maize inbred (Zea mays L.) contains six separable components. Z1 and Z2 are the predominant species, with molecular weights of 21,800 and 19,000 daltons. Amino acid analysis of these two components shows that both are rich in glutamic acid, leucine, and proline, but low in lysine. Of the four minor bands, Z3, Z4, Z5, and Z6, the latter two exist only in trace amounts. A mutation at the opaque-2 locus severely suppresses the synthesis of Z1. The nonallelic mutant, opaque-7, strongly suppresses the synthesis of Z3 and Z4, while slightly reducing Z2. On the other hand, the floury-2 mutant appears to reduce the synthesis of these six proteins in the same relative proportion. In the double mutant combinations, opaque-2 apparently is epistatic to opaque-7 and floury-2 in the synthesis of zein components. The glutelin fraction shows a more complex banding pattern; however, qualitative differences are not apparent among the mutant lines examined.

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Authors and Affiliations

1. Department of Botany and Plant Pathology, Purdue University, West Lafayette, Indiana
   K. H. Lee, R. A. Jones, A. Dalby & C. Y. Tsai

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1. K. H. Lee
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2. R. A. Jones
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3. A. Dalby
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4. C. Y. Tsai
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This research was supported in part by a grant from the Lilly Endowment.

Journal Paper No. 6100 of the Purdue University Agricultural Experimental Station.

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Lee, K.H., Jones, R.A., Dalby, A. et al. Genetic regulation of storage protein content in maize endosperm.Biochem Genet 14, 641–650 (1976). https://doi.org/10.1007/BF00485842

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• Received: 01 December 1975
• Revised: 18 February 1976
• Issue Date: August 1976
• DOI: https://doi.org/10.1007/BF00485842

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