834 Articles | Page 1 of 70

 

Granting an Extension: mRNAs Produced by Read-through from Small Nuclear RNAs

The C-terminal domain (CTD) of RNA polymerase II (Pol II) extends from the catalytic core and consists of repeats of a seven-amino acid motif. The CTD functions in the regulation of Pol II function and is subject to just about every protein modification you can think of, including methylation, acetylation, ubiquitination, phosphorylation, and O‑GlcNAcylation (reviewed […]

Thank you

This past year at ASPB we’ve been thinking a lot about how we can support early-career researchers no matter their career goals. One of the motivations for developing the Plantae platform has been to provide an online home for plant scientists across the globe and career spectrum, to allow informal communities and learning groups to […]

Update: Oxygen sensing and integrative stress signaling in plants

Plants grow in a dynamic environment and continuously face numerous stress conditions in parallel. This fluctuating environment pushed the evolution of extensive metabolic flexibility (Sweetlove et al., 2010; van Dongen et al., 2011). Flooding is an example of an environmental condition that combines many different stress factors simultaneously, including limited gas diffusion (e.g. of oxygen, […]

Update: Cytoplasmic mRNA dynamics

The export of an mRNA from the nucleus to the cytoplasm begins an odyssey of dynamic regulation that determines the location, longevity and use of the transcript in the production of polypeptides by ribosomes in plant cells. Recent leveraging of mutants, imaging of fluorescent proteins and ‘omics’ of protein and ribosome association with mRNAs have […]

Flavonols Modulate ROS in Tomato Guard Cells

Although reactive oxygen species (ROS) have historically been considered damaging agents within cells, recent studies have demonstrated that these molecules also serve as second messengers in signaling pathways. The reactive nature of ROS allows these compounds to function as signaling molecules by reversibly oxidizing Cys residues in proteins, modulating enzyme structure or activity. Plant cells […]

Arabidopsis DNA Methylome Stability under Stress

It has been speculated that DNA methylation could complement genetic variation, as a mode for transferring heritable information, to contribute to phenotypic variation. Indeed, DNA methylation states can be maintained faithfully over both mitotic and meiotic cell division. According to this view, any accumulated variations in the DNA methylome have the potential to be carried […]

Resistance to Wheat Stripe Rust

Wheat (Triticum aestivum) yields can be severely reduced by the obligate biotrophic pathogen Puccinia striiformis f. sp. tritici (Pst).  Currently, approaches to manage this disease rely on cultivar resistance coupled with fungicide application. However, driven by a greater need for wheat production, the necessity for environmental protection, the constant evolution of virulence in rust fungi, […]

Origin and Role of ABA in Stomatal Regulation

When the vapor pressure difference (VPD) between a leaf and the atmosphere increases (i.e., when air humidity decreases), guard cells lose turgor, thereby leading to stomatal closure. The evolution of this mechanism was an important step in the colonization of land by plants, since it enabled plants to control water loss when they were exposed […]

GA Signaling Increases Cytosolic Calcium

Gibberellins (GAs) regulate many aspects of plant development, including seed germination, stem elongation, flower induction, and anther development. DELLA proteins, of which there are 5 in Arabidopsis (Arabidopsis thaliana), play a central role in GA signaling. GA triggers DELLA degradation via the ubiquitin-proteasome pathway, thereby promoting plant growth. Some transcriptome analyses, however, have suggested that […]

The Small Secreted Peptides of Legumes

Small secreted peptides (SSPs) are peptides of 5 to 50 amino acid residues that are secreted into the apoplast. SSPs are critical regulators of a diverse array of growth and developmental processes in plants, including root growth, nutrient homeostasis, meristem maintenance, stress acclimation, pathogen defense, reproductive development, and symbiotic interactions. Despite the importance of SSPs, […]

Update: Nuclear Cap-Binding Complex in Abiotic Stress Responses

By Agata Daszkowska-Golec The nuclear cap-binding 16 complex (nCBC) in higher eukaryotes specifically binds to the monomethylated (7-methylguanosine (m717 GpppN)) cap structure at the 5¢ end of freshly transcribed mRNA. In addition to protecting mRNAs from degradation by exonucleases, the nCBC functions in transcription, polyadenylation, splicing, miRNA biogenesis and the nuclear export of capped RNAs. […]

834 Articles | Page 1 of 70