Insights from paleogenomic and population studies into the consequences of dosage sensitive gene expression in plants.

Abstract

Classical studies of plant phenotypes of individuals with whole or partial genome dosage changes led to the concept of genomic balance. Subsequent studies of gene expression in ploidy and aneuploidy series showed a greater number of modulations in aneuploid plants than with whole genome changes leading to the idea that gene expression processes were modulated by stoichiometric changes of interacting regulatory factors. Recent studies of genomic sequences and copy number variants in populations reveal different fates of duplicate genes depending on whole genome or segmental duplication. Following polyploidy formation, members of macromolecular complexes persist in the evolutionary lineage longer than random genes and a complementary pattern is found for segmental duplications in that there is an underrepresentation of members of macromolecular complexes. These and other studies described suggest there are negative fitness consequences when an imbalance occurs for members of macromolecular complexes including regulatory functions.

• Authors: James A Birchler
• Journal: Current opinion in plant biology (Curr Opin Plant Biol) Vol. 15 Issue 5 Pg. 544-8 (Nov 2012) ISSN: 1879-0356 [Electronic] England
• PMID: 22939251 (Publication Type: Journal Article, Research Support, U.S. Gov't, Non-P.H.S., Review)
• Copyright: Copyright © 2012 Elsevier Ltd. All rights reserved.

Topics

• Aneuploidy
• Chromosomes, Plant (genetics)
• Evolution, Molecular
• Gene Dosage
• Gene Duplication
• Gene Expression Regulation, Plant
• Genome, Plant (genetics)
• Genomics
• Models, Genetic
• Plants (genetics)
• Polyploidy