Entries by Linda Palmer

AT the Onset of DNA Replication in Arabidopsis

Author Anne-Sophie Fiorucci Affiliation Centre for Integrative Genomics, Faculty of Biology and Medicine, Génopode Building, University of Lausanne, CH-1015 Lausanne, Switzerland. ORCID number 0000-0002-3254-5967 DNA replication allows doubling of the genomic content of a cell before division. In eukaryotes, it starts at multiple places called origins of replication (ORI) where the replication machinery is loaded […]

It takes two to tango: two GNOMs have to activate ARF1 together

Brumm et al. investigate how the protein GNOM activates dimers of the small GTPase ARF1 and inserts them very close to each other during vesicle formation. The Plant Cell (2020) https://doi.org/10.1105/tpc.20.00240 By Sabine Brumm 1,2 and Gerd Jürgens 1, ZMBP, University of Tübingen (1), Sainsbury Laboratory, University of Cambridge (2) Background: Eukaryotic cells deliver one […]

Phosphoregulation within the photorespiratory cycle: regulate smarter – adapt better?

Marc-Sven Roell1 ORCID ID: 0000-0003-2714-8729 1Institute of Plant Biochemistry, Heinrich-Heine University Düsseldorf, Universitätsstrasse 1, 40225 Düsseldorf, Germany marc-sven.roell@hhu.de To cope with various abiotic and biotic stress factors, plants must be facile in adapting cellular metabolism. In particular, they have to adjust photosynthesis and balance associated metabolism. Heat and drought stress strengthen plant photorespiration, a metabolic […]

Overcoming Algal Vitamin B12 Auxotrophy by Experimental Evolution

Vitamin B12 (B12) is produced only by prokaryotes (Fang et al., 2017), but is also widely required among eukaryotes as an enzymatic cofactor. In the green lineage, the only B12-dependent enzyme is methionine synthase. Several green algae can synthesize methionine only thanks to B12 provided by mutualistic prokaryotes (Croft et al., 2005, Grant et al., […]

How Do Plants Adapt to Dark and Bright Light Conditions?

Kimura et al. illuminate a molecular mechanism to allow germinating seedlings of Arabidopsis thaliana to adapt to dark and bright light conditions during hypocotyl phototropism.  Plant Cell https://doi.org/10.1105/tpc.19.00926 By Taro Kimura and Tatsuya Sakai; Graduate School of Science and Technology, Niigata University, Niigata-shi, Niigata, 950-2181, Japan. Background: When we come out of a dark tunnel […]

Calcium signaling in senescence

Durian et al. searched for phosphorylation substrates of Arabidopsis CALCIUM DEPENDENT PROTEIN KINASE1 and found that it phosphorylates ORE1, a master regulator of senescence, demonstrating a link between calcium signaling and cell death.  Plant Cell https://doi.org/10.1105/tpc.19.00810 By Guido Durian1 and Tina Romeis2 1University of Turku, Molecular Plant Biology, Department of Biochemistry, FI-20014 Turku, Finland 2Leibniz […]

Sulfotransferase 1 is the enzymatic hub of sulfated salicinoids in poplar.

Plants produce a plethora of specialized metabolites serving as a chemical arsenal against abiotic and biotic challenges during their lifetime. Core metabolites serve as building blocks for diverse decorating enzymes like oxidases, reductases or transferases that introduce new functionalities expanding the structural diversity and resulting in an astonishing metabolic palette dispersed in the plant kingdom. […]

ASTREL Projection: Comparative Phylogenomics Uncovers Novel Genes Co-eliminated with the EDS1 Immune Pathway

The plant immune system is largely centered around immune receptors that monitor for pathogen-derived signatures. Extracellular immunity is afforded through cell-surface receptors recognizing common microbial motifs like bacterial flagellin or fungal chitin (Boutrot and Zipfel, 2017). By contrast, intracellular immunity relies on disease resistance (R) receptors that directly or indirectly perceive pathogen virulence effectors attempting […]

What Are the Roles for Dehydroascorbate Reductases and Glutathione in Sustaining Ascorbate Accumulation?

Elisa Dell’Aglio1 and Amna Mhamdi2 1 Institut National des Sciences Appliquées-Lyon, 69100 Villeurbanne, France 2 Ghent University, Department of Plant Biotechnology and Bioinformatics, and VIB Center for Plant Systems Biology, 9052 Ghent, Belgium Address correspondence to elisa.dell-aglio@insa-lyon.fr   Ascorbate (vitamin C) is one of the main redox buffers required for metabolizing reactive oxygen species. Its […]