Entries by Magdalena Julkowska

Genome-wide excision repair in Arabidopsis is coupled to transcription and reflects circadian gene expression patterns (Nature Comms)

Exposure to ultraviolet radiation and numerous other factors can cause mispairing of the nucleotides in the DNA, compromising genome integrity. Luckily, plants employ excision repair systems to recognize and repair such DNA damage. Oztas et al. examined the dynamics of such a repair system by using excision repair-sequencing method (XR-seq) to identify genome-wide excision repair […]

BRI1 and BAK1 interact with G proteins and regulate sugar-responsive growth and development (Nature Comms.)

Sensing sugar is important, especially if you are a plant, as it helps you to decide whether to invest it in new tissues, or rather store it for later. Low levels of glucose promote seedling growth, while high concentrations repress the development. Peng et al. discovered that brassinosteroid signaling is playing a crucial role in […]

Comparative analysis of Arabidopsis ecotypes reveals a role for brassinosteroids in root hydrotropism (Plant Physiol.)

Plastic plant growth serves them well, as it ensures efficient exploration of the environment. A plant can direct the growth of its roots towards the water, but the mechanisms behind hydrotropism are still to be fully understood. Miao et al. performed a screen of 30 Arabidopsis accessions for altered root hydrotropic responses. The accessions were […]

The “PhenoBox”, a flexible, automated, open-source plant phenotyping data solution (OA)

High-throughput plant phenotyping systems are an excellent tool for analyzing large plant populations, providing better understanding of plant growth, productivity and performance under stress conditions. Unfortunately, high-throughput platforms are also high on costs and limited in their adaptability for specific questions, limiting the use by the researchers. Czedik-Eysenberg et al. presents a PhenoBox/PhenoPipeline, a scalable […]

TSO1 and MYB3R1 form a regulatory module to coordinate cell proliferation with differentiation (PNAS)

In order to ensure proper development, plants need to balance cell proliferation and differentiation. Mutation in TSO1 causes disorganization of cell layers, leading to drastic reduction in fertility. A mutagenesis screen for rescue of fertility in the tso1-1 background identified  MYB3R1 as major partner of TSO1 in cell organization and cell cycle control. In the […]

Biosynthesis of redox active metabolites in response to iron deficiency in plants (Nature Chem Biol)

Iron is an essential but poorly bioavailable micronutrient that serves as a co-factor in many processes involved in electron- or oxygen-transfer. Land-plants evolved at least two distinct mechanism for iron uptake based on chelation of iron by phytosiderophores, that are produced only by grasses, or acidification of the rhizosphere and enzymatic reduction of iron chelates […]

Dysregulation of expression correlates with rare-allele burden and fitness loss in maize ($) (Nature)

Deleterious mutations often underlie disease susceptibility and reduced fitness, but are very difficult to study due to their low frequency in the population. Maize is a great system for studying deleterious mutations because of high genetic diversity and the rapid decay in genetic linkage, enabling high resolution mapping of rare and common alleles.  Kremling and […]

Evolutionary history resolves global organization of root functional traits ($) (Nature)

Roots differ in their form and function, as they need to compete for water and nutrients in the wide range of environment. Although we are starting to understand some adaptive aspects of individual root morphology features, the adaptive features of root organization are still poorly understood. Ma and colleagues evaluated the roots of 369 species […]

FERONIA rmaintains cell-wall integrity during salt stress through Ca2+ signaling (Curr. Biol.)

Growing plant cells need to loosen up their cell walls while maintaining their integrity. This process gets trickier when plants are exposed to salt stress. Feng et al. describe the important role of the plasma membrane-localized receptor-like kinase FERONIA in restoring growth and cell wall integrity after exposure to salinity. FERONIA mutants showed high rate […]