Entries by Mary Williams

Boundary formation through direct threshold-based readout of mobile small RNA gradients

How does a flat leaf form? Previous studies have indicated that the formation of a flattened blade depends upon a boundary layer between the upper and lower cell layers, and that mobile small RNAs contribute to this boundary, but how this occurs is not fully resolved. For example, although the small RNA tasiRNA is present […]

Fe sparing in Arabidopsis rosettes

All cells need iron (Fe), which is frequently limiting for life. Plants (like other organisms) have complex strategies for uptake of Fe from their environment. Studies in the green alga Chlamodomonas have demonstrated that these organisms are able to prioritize certain pathways when Fe is limiting, a process called “Fe sparing”. Hantzis et al. used […]

What we’re reading: November 24th

A special “thank you” too the many people who have contributed to What We’re Reading over the past year! And don’t forget you can sign up to receive email alerts – click here then “Notify me of new content”. Review: Plant systems biology at the single-cell level The establishment and enormous developments in -omics and […]

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 […]

Update on Myosin Motors: Molecular Mechanisms and Physiological Functions

The cytoskeleton is the main organizing principle that defines not only the distribution of cellular components within cells but also the overall shape and growth pattern of cells and entire multicellular organisms. This function is particularly evident in plant cells where, for example, the organization of cortical microtubules determines the orientation of cellulose microfibrils in […]

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. […]