How transposable elements are recognized and epigenetically silenced in plants?
Curr Opin Plant Biol
; 75: 102428, 2023 10.
Article
in En
| MEDLINE
| ID: mdl-37481986
ABSTRACT
Plant genomes are littered with transposable elements (TEs). Because TEs are potentially highly mutagenic, host organisms have evolved a set of defense mechanisms to recognize and epigenetically silence them. Although the maintenance of TE silencing is well studied, our understanding of the initiation of TE silencing is limited, but it clearly involves small RNAs and DNA methylation. Once TEs are silent, the silent state can be maintained to subsequent generations. However, under some circumstances, such inheritance is unstable, leading to the escape of TEs to the silencing machinery, resulting in the transcriptional activation of TEs. Epigenetic control of TEs has been found to be closely linked to many other epigenetic phenomena, such as genomic imprinting, and is known to contribute to regulation of genes, especially those near TEs. Here we review and discuss the current models of TE silencing, its unstable inheritance after hybridization, and the effects of epigenetic regulation of TEs on genomic imprinting.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
DNA Transposable Elements
/
Epigenesis, Genetic
Language:
En
Journal:
Curr Opin Plant Biol
Journal subject:
BOTANICA
Year:
2023
Document type:
Article
Affiliation country:
United States