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Tissue-specific patterns of a maize Myb transcription factor are epigenetically regulated by Suzy M. Cocciolone; Surinder Chopra; Sherry A. Flint-Garcia; Michael D. McMullen; Thomas Peterson is a Agricultural and Biological Sciences article available to read on EtoBox.

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## Summary The maize __p1__ gene encodes a __Myb__‐homologous regulator of red pigment biosynthesis. To investigate the tissue‐specific regulation of the __p1__ gene, maize plants were transformed with constructs combining promoter and cDNA sequences of two alleles which differ in pigmentation patterns: __P1‐wr__ (white pericarp/red cob) and __P1‐rr__ (red pericarp/red cob). Surprisingly, all promoter/cDNA combinations produced transgenic plants with red pericarp and red cob (RR pattern), indicating that the __P1‐wr__ promoter and encoded protein can function in pericarp. Some of the RR patterned transgenic plants produced progeny plants with white pericarp and red cob (WR pattern), and this switch in tissue‐specificity correlated with increased transgene methylation. A similar inverse correlation between pericarp pigmentation and DNA methylation was observed for certain natural __p1__ alleles, which have a gene structure characteristic of standard __P1‐wr__ alleles, but which confer red pericarp pigmentation and are consistently less methylated than standard __P1‐wr__ alleles. Although we cannot rule out the possible existence of tissue‐specific regulatory elements within the __p1

Who reads Tissue-specific patterns of a maize Myb transcription factor are epigenetically regulated?

Author

Suzy M. Cocciolone; Surinder Chopra; Sherry A. Flint-Garcia; Michael D. McMullen; Thomas Peterson

Publisher

John Wiley and Sons; Wiley (Blackwell Publishing); Blackwell Publishing Inc.; Wiley (ISSN 0960-7412)

Published

2001

Language

EN

Field

Agricultural and Biological Sciences (Life Sciences)