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Titolo:
ANTHOCYANIN REGULATORY MUTATIONS IN PEA - EFFECTS ON GENE-EXPRESSION AND COMPLEMENTATION BY R-LIKE GENES OF MAIZE
Autore:
UIMARI A; STROMMER J;
Indirizzi:
UNIV GUELPH,DEPT MOL BIOL & GENET,BOVEY BLDG GUELPH ON N1G 2W1 CANADA UNIV GUELPH,DEPT MOL BIOL & GENET GUELPH ON N1G 2W1 CANADA UNIV GUELPH,DEPT HORT SCI GUELPH ON N1G 2W1 CANADA
Titolo Testata:
MGG. Molecular & general genetics
fascicolo: 2, volume: 257, anno: 1998,
pagine: 198 - 204
SICI:
0026-8925(1998)257:2<198:ARMIP->2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
CHALCONE SYNTHASE; TRANSCRIPTIONAL ACTIVATORS; NUCLEOTIDE-SEQUENCE; MOLECULAR ANALYSIS; ANTIRRHINUM-MAJUS; ARABIDOPSIS; PLANT; BIOSYNTHESIS; PIGMENTATION; HOMOLOGY;
Keywords:
PISUM SATIVUM; PEA; ANTHOCYANIN; REGULATORY GENES; COMPLEMENTATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
38
Recensione:
Indirizzi per estratti:
Citazione:
A. Uimari e J. Strommer, "ANTHOCYANIN REGULATORY MUTATIONS IN PEA - EFFECTS ON GENE-EXPRESSION AND COMPLEMENTATION BY R-LIKE GENES OF MAIZE", MGG. Molecular & general genetics, 257(2), 1998, pp. 198-204

Abstract

Anthocyanin production in higher plants is a function of the tissue considered and its developmental stage, and is modulated by environmental factors. In maize, the best characterized system, regulation of thepathway is achieved largely through the action of proteins with homology to the transcriptional factors encoded by myc and myb proto-oncogenes of animals; these homologues control the expression of structural genes and thus regulate the availability of anthocyanin biosynthetic enzymes. We have studied anthocyanin biosynthesis and its regulation inflowers of pea (Pisum sativum). Our results demonstrate a correlationbetween anthocyanin accumulation and steady-state mRNA levels for genes encoding chalcone synthase, flavanone 3 beta-hydroxylase, and dihydroflavonol 4-reductase in developing flowers. Patterns of expression for these biosynthetic genes in both a and a(2) mutants confirm the regulatory roles of the two a loci. The reduced expression of all three biosynthetic genes in mutant lines suggests that genes acting both early and late in the anthocyanin biosynthetic pathway are controlled by aand a(2). Particle bombardment of floral tissue demonstrates the ability of two maize R-like genes, Le and R-S, but neither myb-like genes nor R-like genes from snapdragon or petunia, functionally to complement a and a(2) mutations. We cannot distinguish whether a and at act coordinately or sequentially in anthocyanin regulation, but the epistaticaction of maize R-like genes suggests that they mimic the action of agene that normally functions downstream of both a and a(2) in the regulatory cascade.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 18/01/21 alle ore 16:16:10