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Updated: Jun 17, 2026

Efficient and Rapid Isolation of Early-stage Embryos from Arabidopsis thaliana Seeds
Published on: June 7, 2013
Maternal control of Pol IV-dependent siRNAs in Arabidopsis endosperm
1Department of Plant Sciences, University of Cambridge, Downing Street, Cambridge, CB2 3EA, UK. rm536@cam.ac.uk
Abstract:
Small RNAs recently emerged as ubiquitous regulators of gene expression. However, the most abundant class of small RNAs in flowering plants is poorly understood. Known as Pol IV-dependent (p4-)siRNAs, these small RNAs are associated with transcriptional gene silencing, transposable elements and heterochromatin formation. Recent research demonstrates that they are initially expressed in the maternal gametophyte and uniparentally expressed from maternal chromosomes in developing endosperm. This unique expression pattern links p4-siRNAs to double fertilization, parental genome interactions and imprinted gene expression.
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