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. 1989 Jun;1(6):569–578. doi: 10.1105/tpc.1.6.569

Tissue-specific expression of a wheat high molecular weight glutenin gene in transgenic tobacco.

L S Robert 1, R D Thompson 1, R B Flavell 1
PMCID: PMC159792  PMID: 2535510

Abstract

The expression of a wheat genomic clone containing the entire coding sequence of the high molecular weight glutenin subunit 12 gene flanked by 2.6 kilobases of 5' and 1.5 kilobases of 3' sequences has been studied after introduction into tobacco. Seeds of different tobacco plants containing the full-length wheat genomic clone accumulated different amounts of intact high molecular weight glutenin subunit mRNA and of a polypeptide displaying the solubility, molecular weight, and antigenic properties of the high molecular weight glutenin subunit 12. The wheat protein accumulated without obvious degradation products and constituted up to approximately 0.1% of the total tobacco endosperm protein. Restriction fragments corresponding to 2.6 kilobases, 1.4 kilobases, and 433 base pairs of high molecular weight glutenin 5' upstream sequence were fused to the coding sequence of the chloramphenicol acetyltransferase (CAT) gene in the vector polyCATter and transferred into tobacco. Chloramphenicol acetyltransferase enzyme activity was detected only in the seed endosperm tissue of the transformed plants. It was detected in tobacco seeds 8 days after anthesis and persisted until seed maturity. It is concluded that 433 base pairs of high molecular weight glutenin upstream sequence are sufficient to confer endosperm-specific expression of this monocot gene in the dicot tobacco.

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Selected References

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