Linked Life Data

9491078

Source:http://linkedlifedata.com/resource/pubmed/id/9491078

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1998-3-19
pubmed:abstractText
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 the pathway 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 in flowers of pea (Pisum sativum). Our results demonstrate a correlation between 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 a2 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 a and a2. Particle bombardment of floral tissue demonstrates the ability of two maize R-like genes, Lc and R-S, but neither myb-like genes nor R-like genes from snapdragon or petunia, functionally to complement a and a2 mutations. We cannot distinguish whether a and a2 act coordinately or sequentially in anthocyanin regulation, but the epistatic action of maize R-like genes suggests that they mimic the action of a gene that normally functions downstream of both a and a2 in the regulatory cascade.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0026-8925
pubmed:author
pubmed:issnType
Print
pubmed:volume
257
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
198-204
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1998
pubmed:articleTitle
Anthocyanin regulatory mutations in pea: effects on gene expression and complementation by R-like genes of maize.
pubmed:affiliation
Department of Molecular Biology and Genetics, University of Guelph, Ontario, Canada.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't