Recent Posts

Review: Time to wake up: Epigenetic and small-RNA-mediated regulation during seed germination (Plants)

Seed germination is a crucial step in plants' life cycle and has critical implications in ecological and agronomic contexts. Therefore, there has been an increasing interest in understanding the mechanisms that prevent or trigger this process. Here, Luján-Soto and Dinkova provide a thorough review of…

Combinations of maternal-specific repressive epigenetic marks in the endosperm control seed dormancy (bioRxiv.)

H3K27me3 [K27 (Lysine 27) trimethylation on histone H3] and H3K9me2 are two epigenetic modifications that repress gene activity in plants. While they are typically present in different genomic regions, both marks are found in the seed endosperm. Here, Sato and colleagues show that this histone modification…

The canonical RdDM pathway mediates the control of seed germination timing under salinity ($) (Plant J.)

The canonical RdDM pathway mediates the control of seed germination timing under salinity ($) Epigenetic regulation can ensure that plant developmental programs and stress responses are tightly coordinated so that environmental changes do not compromise plant fitness. One of the mechanisms to achieve…

A DNA Methylation Reader with an Affinity for Salt Stress

High levels of soil salinity lead to toxic accumulation of sodium (Na+) and chloride (Cl-) ions in plants, which adversely affect plant growth and yield. Plants use several strategies to cope with salt stress. These include removal and compartmentalization of toxic ions, and maintenance of growth and…

Active DNA demethylation controls defense gene regulation and antibacterial resistance (bioRxiv)

Epigenetic reprogramming, such as DNA methylation changes, has emerged as a crucial regulator of plant defense responses. Homeostasis of DNA methylation is controlled by a balance between methylation and demethylation. ROS1 (Repressor Of Silencing 1) is an Arabidopsis demethylases that is known to…

Single nucleus analysis of Arabidopsis seeds reveals new cell types and imprinting dynamics (bioRxiv)

Arabidopsis seeds consist of various tissue like seed coat, embryo, and endosperm. The endosperm provides the nutrient supplies to the growing embryo and has three domains namely, micropylar (surrounding embryo), chalazal (opposite end of the seed), and peripheral (in between micropylar and chalazal)…

In the Transcripts: Long-read Transcriptomics Enables a Novel Type of Transposable Element Annotation in Plants

Transposable Elements (TEs) are mobile genetic elements and major constituents of eukaryotic chromosomes. TEs promote genetic and epigenetic variation within genomes and are a major source of evolutionary novelty and adaptation (Lisch, 2013). In plants, TEs represent from 20% of the genomic content in…

The 3′ processing of antisense RNAs physically links to chromatin-based transcriptional control (PNAS)

In Arabidopsis, multiple genetic pathways control the floral transition in response to external and internal stimuli. Among these, components of the autonomous pathway promote flowering by negatively regulating the central floral repressor FLOWERING LOCUS C (FLC). Despite the wealth of information on…

Roles for CHROMATIN REMODELING 4 in Arabidopsis floral transition (Plant Cell)

The time at which flowers appear is critical for plant reproductive success. As such, the vegetative to reproductive growth transition is governed by several cues: environmental (photoperiod, temperature) and endogenous (gibberellins, age). Here, Sang et al. used an elegant forward-genetics approach…