Recent Posts

A New Epigenetic Switch Regulating Histone Modification

Mateo-Bonmatí et al. have found novel components of the Arabidopsis epigenetic machinery. Plant Cell (2018). https://doi.org/10.1105/tpc.18.00300  By Eduardo Mateo-Bonmatí, Lucía Juan-Vicente, Riad Nadi, and José Luis Micol Background: In multicellular organisms, most cells contain the same…

Review. Actions of plant Argonautes: Predictable or unpredictable? (COPB $)

The Arabidopsis genome encodes nine Argonaute proteins and an AGO pseudogene. The nine functional proteins fall into three clades based on sequence. Ma and Zhang update what we know about these proteins. It turns out, the simple assumptions made early on have not entirely been borne out. For example,…

Chen Mingsheng's research team found an evolutionary trend of genes fleeing the centromere region

Article source: http://theworldseeds.cn/index.php?p=152804 (Translated by Google Translate) The centromere and its surroundings are the fastest-evolving and most complex areas of the plant genome. The centromere and near centromere regions not only undergo rapid sequence changes and structural remodeling,…

Powering Epigenetics through the 1C Pathway

By Lisa Smith and Nathan Butler Epigenetic modifications in plants repress transposable elements to maintain genome stability and facilitate adaptation to changing environmental conditions by regulating the expression of some genes. Furthermore, conditions such as disease stress can alter the epigenetic…

Variability of paternally imprinted gene expression linked to hybridization failure in Capsella (Nature Plants)

Hybrid seed lethality represents a major reproductive barrier in angiosperms and facilitates species divergence over evolutionary times. Hybrid seed lethality is mainly due to defective endosperm development, leading to embryo arrest. Hybrid seed defects show a parent-of-origin effect, but the underlying…

Stay CLASSY: Control of locus-specific de novo DNA methylation by the CLASSY family ($) (Nature Genet.)

DNA methylation is fundamental for genome function and stability, including regulation of gene expression, silencing of transposable elements and control of recombination. While the processes involved in maintenance of DNA methylation are generally well understood, the factors required for locus-specific…

DNA methylation dynamics during early plant life

DNA methylation is extensively reprogrammed in the early embryo and germlines of mammals, whereas flowering plants do not show such extensive resetting except in the endosperm. Active DNA demethylation in the central cell and reduced activity of DNA methyltransferases leads to global hypomethylation…

Extensive transcriptomic and epigenomic remodelling occurs during Arabidopsis thaliana germination

Understanding the complex regulatory mechanisms that contribute to germination and seedling establishment requires integration of gene-expression, transcription factors (TFs), DNA methylation, smallRNA data, and their interactions. Narsai et al. describe the first dynamic transcription factor network…

Comparison of the relative potential for epigenetic and genetic variation to contribute to trait stability

Epigenetic variation, both natural and induced, can influence heritable phenotypic variation of complex traits. Understanding the effect of epigenetic changes on trait variation is complicated by the confounding effects of DNA sequence polymorphisms. To overcome this complication, epigenetic recombinant…