[Epigenetic phenomena of plant polyploids].
Epigenetic phenomena, heritable changes in phenotype, and hence in gene regulation, but not in DNA sequence, occur in the process of polyploidization in many plants. These phenomena include gene silencing, DNA methylation, nucleolar dominance, transposable elements activation and genomic imprinting. Epigenetic phenomena might be caused by gene silencing or alternative gene expression from intergenomic interaction. These could also be induced from the changes of histone coding, without DNA methylation. Furthermore, hypomethylation, chromatin reconstitution or transposable element activation could contribute to epigenetic phenomena. These modifications may give rise to the diversification of gene expressing, to the genetic and cytological diploidization, as well as to intergenomic coordination. This paper reviews epigenetic phenomena in many plants and their influence on evolution of plant genome, thus hint the likely pathway of research in this field.
Yang
Jun-Bao
JB
College of Life Science, China West Normal University, Nanchong 637002, China. yjb1977@cwnu.edu.cn
Peng
Zheng-Song
ZS
D004251:DNA Transposable Elements / Q000235:genetics; D044127:Epigenesis, Genetic; D019143:Evolution, Molecular; D018506:Gene Expression Regulation, Plant; D010944:Plants / Q000235:genetics*; D011123:Polyploidy
D004251:DNA Transposable Elements