Abstract
The maize P-rr gene conditions floral-specific flavonoid pigmentation, especially in the kernel pericarp and cob. We analyzed the P-rr promoter by transient expression assays, in which segments of the P-rr promoter were fused to the GUS reporter gene and introduced into maize cells by particle bombardment. A basal P-rr promoter fragment (−235 to +326) gave low, but significant, levels of GUS reporter gene expression. Interestingly, two widely spaced segments containing enhancer-like activity were found. When tested individually, both the proximal (−1252 to −236) and distal (−6110 to −4842) segments boosted expression of the basal P-rr promoter::GUS construct about five-fold. A 1.6 kb segment of the P-rr promoter (−1252 to +326) containing the proximal enhancer and the 5′-untranslated leader driving the GUS reporter gene showed preferential expression in BMS and embryogenic suspension cell cultures vs. endosperm-derived suspension cell cultures. These results demonstrate the application of transient assay techniques for the identification of regulatory elements responsible for floral-specific regulation of the complex P-rr gene promoter in maize.
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An G, Mitra A, Choi H, Costa M, Thornburg R, Ryan C: Functional analysis of the 30 control region of potato wound inducible proteinase inhibitor II gene. Plant Cell 1: 115–122 (1989).
Armstrong, CL: Regeneration of plants from somatic cell cultures: applications for in vitro genetic manipulation. In: Freeling M, Walbot V (eds) The Maize Handbook, pp. 663–671. Springer-Verlag, New York (1994).
Athma P, Peterson T: Ac induces homologous recombination at the maize P locus. Genetics 128: 163–173 (1991).
Athma P, Grotewold E, Peterson T: Insertional mutagenesis of the maize P gene by intragenic transposition of Ac. Genetics 131: 199–219 (1992).
Bowen B. Anthocyanin genes as visual markers in transformed maize tissues. In: Gallagher SR (ed) GUS protocols: Using the GUS Gene as a Reporter of Gene Expression, pp. 163–177. Academic Press, San Diego, CA (1992).
Byrne PF, McMullen MD, Snook ME, Musket TA, Theuri JM, Widstrom NW, Wiseman BR, Coe EH: Quantitative trait loci and metabolic pathways: genetic control of the concentration of maysin, a corn earworm resistance factor, in maize silks. Proc Natl Acad Sci. USA 93: 8821–8825 (1996).
Callis J, Fromm M, Walbot V: Introns increase gene expression in cultured cells. Genes Dev 1: 1183–1210 (1987).
Chopra S, Athma P, Peterson T: Alleles of the maize P gene with distinct specificities encode Myb-homologous proteins with C-terminal replacements. Plant Cell 8: 1149–1158 (1996).
Chourey PS, Zurawski DB: Callus formation from protoplasts of a maize cell culture. Theor Appl Genet 59: 341–344 (1981).
Coe EH, Neuffer MG, Hoisington DA: The genetics of corn. In: Sprague GF, Dudley J (eds) Corn and Corn Improvement, pp. 81–258. American Society of Agronomy, Madison, WI (1988).
Das OP, Messing J: Variegated phenotype and developmental methylation changes of a maize allele originating from epimutation. Genetics 136: 1121–1141 (1994).
DeWet J, Wood K, DeLuca M, Helinski D, Subramani S: Fire-fly luciferase gene: structure and expression in mammalian cells. Mol Cell Biol 7: 25–37 (1987).
Dooner H, Robbins T, Jorgensen R: Genetic and developmental control of anthocyanin biothynthesis. Annu Rev Genet 25: 173–199 (1991).
Frish DA, van der Gheest AHM, Dias K, Hall TC: Chromosomal integration is required for spatial regulation of expression from the β-phaseolin promoter. Plant J 7: 503–512 (1995).
Goff S, Cone K, Fromm M: Identification of functional domains in the maize transcriptional activator C1: comparison of wild-type and dominant inhibitor proteins. Genes Dev 5: 298–309 (1991).
Goff SA, Cone KC, Chandler VL: Functional analysis of the transcriptional activator encoded by the maize B gene: evidence for direct functional interaction between two classes of regulatory proteins. Genes Dev 6: 864–875 (1992).
Green CE: Prospects for crop improvement in the field of cell culture. HortScience 12: 7–10 (1977).
Grotewold E, Athma P, Peterson T: Alternatively spliced products of the maize P gene encode proteins with homology to the DNA binding domain of Myb-like transcription factors. Proc Natl Acad Sci USA 88: 4587–4591 (1991).
Grotewold E, Drummond B, Bowen B, Peterson T: The Mybhomologous P gene controls phlobaphene pigmentation in maize floral organs by directly activating a flavonoid biosythetic gene subset. Cell 76: 543–553 (1994).
Grotewold E, Chamberlin M, Snook M, Siame B, Butler L, Swenson J, Maddock S, St. Clair G, Bowen B: Engineering secondary metabolism in maize cells by ectopic expression of transcription factors. Plant Cell 10: 721–740 (1998).
Hamilton D, Roy M, Rueda J, Sindhu R, Sanford J, Mascaurenhas J: Dissection of a pollen-specific promoter from maize by transient transformation assays. Plant Mol Biol 18: 211–218 (1992).
Jefferson R: Assaying chimeric genes in plants: the GUS gene fusion system. Plant Mol Biol Rep 5: 387–405 (1987).
Kao C-Y, Cocciolone S, Vasil I, McCarty D: Localization and integration of the cis-acting elements for abscisic acid, Viviparous1, and light activation of the C1 gene ofmaize. Plant Cell 8: 1171–1179 (1996).
Katagiri F, Chua NH: Plant transcriptional factors: present knowledge and future challenges. Trends Genet 8: 22–27 (1992).
Kato H, Wada M, Muraya K, Malik K, Shiraishi T, Ichinose Y, Yamada T: Characterization of nuclear factors for elicitormediated activation of the promoter of the pea phenylalanine ammonia-lyase gene. Plant Physiol 108: 129–139 (1995).
Klein TM, Fromm M, Weissinger A, Tomes D, Schaaf S, Sletten K, Sanford JC: Transfer of foreign genes into intact maize cells with high-velocity microprojectiles. Proc Natl Acad Sci USA 85: 4305–4309 (1988).
Klein T, Kornstein L, Sanford J, Fromm M: Genetic transformation of maize cells by particle bombardment. Plant Physiol 91: 440–444 (1989).
Lechelt C, Peterson T, Laird A, Chen J, Dellaporta S, Dennis E, Peacock WJ, Starlinger P: Isolation and molecular analysis of the maize P locus. Mol Gen Genet 219: 225–234 (1989).
Ludwig SR, Bowen B, Beach L, Wessler S: A regulatory gene as a novel visible marker for maize transformation. Science 247: 449–450 (1990).
Luehrsen K, Walbot V: Intron enhancement of gene expression and the splicing efficiency of introns in maize cells. Mol Gen Genet 225: 81–93 (1991).
Lund G, Das P, Messing P: Tissue-specific DNAse I-sensitive sites of the maize P gene and their changes upon epimutation. Plant J 7: 797–807 (1995).
Moreno M, Chen J, Greenblatt I, Dellaporta S: Reconstitutional mutagenesis of the maize P gene by short-range Ac transpositions. Genetics 131: 939–956 (1992).
Murashige T, Scoog F: A revised medium for rapid growth and bioassays with tobacco tissue cultures. Physiol Plant 15: 473–497 (1962).
Peterson T: Intragenic transposition of Ac generates a new allele of the maize P gene. Genetics 126: 469–476 (1990).
Sheridan WF: Black Mexican Sweet corn: Its use for tissue cultures. In: Sheridan WF (ed) Maize for Biological Research, pp. 385–388. Plant Molecular Biology Association, Charlottesville, VA (1982).
Sieburth LE, Meyerowitz EM: Molecular dissection of the Agamous control region shows that cis elements for spatial regulation are located intragenically. Plant Cell 9: 35–365 (1997).
Styles ED, Ceska O: The genetic control of flavonoid sythesis in maize. Can J Genet Cytol 19: 3019–3021 (1977).
Styles ED, Ceska O: P and R control of flavonoids in bronze coleoptiles of maize. Can J Genet Cytol 23: 691–704 (1981).
Styles ED, Ceska O: Pericarp flavonoids in genetic strains of Zea mays. Maydica 34: 227–237 (1989).
Su T-Z, El-Gewely MR: A multisite-directed mutagenesis procedure using T7 DNA polymerase: application for reconstructing a mammalian gene. Gene 69: 81–89 (1988).
Tuerck JA, Fromm ME: Elements of the maize A1 promoter required for transactivation by the anthocyanin B/C1 or phlobaphene P regulatory genes. Plant Cell 6: 1655–1663 (1994).
Unger E, Parson R, Schmidt R, Bowen R, Roth B: Dominant negative mutants of Opaque2 suppress transactivation of 22-kd zein promoter by opaque2 in maize endosperm cells. Plant Cell 5: 831–841 (1993).
Walker E, Robbins T, Bureau T, Kermicle J, Dellaporta S: Transposon-mediated chromosomal rearrangements and duplication in the formation of the maize R-r complex. EMBO J 14: 2350–2363 (1995).
Williams CE, Grotewold E: Differences between plant and animal Myb domains are fundamental for DNA binding activity, and chimeric Myb domains have novel DNA binding specificities. J Biol Chem 272: 563–571 (1997).
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Sidorenko, L., Li, X., Tagliani, L. et al. Characterization of the regulatory elements of the maize P-rr gene by transient expression assays. Plant Mol Biol 39, 11–19 (1999). https://doi.org/10.1023/A:1006172815663
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DOI: https://doi.org/10.1023/A:1006172815663