Entries by Linda Palmer

ADP Ribosylation: The Modification Causing a Disease Resistance Sensation

One of the key aspects of pathogenesis is the ability to sabotage host defenses and, to this end, plant pathogens produce a remarkable set of effector proteins that target host defenses at multiple levels. Plants, in turn, have defenses to counteract these effectors; one key aspect of this is the ability to recognize the presence […]

NPR1 has everything under control

Amna Mhamdi Ghent University, Department of Plant Biotechnology and Bioinformatics, and VIB Center for Plant Systems Biology, 9052 Ghent, Belgium Address correspondence to amna.mhamdi@psb.ugent.be NONEXPRESSER OF PR GENES 1 (NPR1) controls plant immunity and is key to salicylic acid (SA)-dependent signaling pathways. First identified via a genetic screen, NPR1 is named after the npr1 mutants […]

Attractive flower smell turned into defense barrier

Boachon et al. explore metabolic processes associated with floral defense. Plant Cell https://doi.org/10.1105/tpc.19.00320 By Benoît Boachon, University of Lyon, UJM-Saint-Etienne, CNRS, BVpam FRE 3727, Saint-Etienne, France. Danièle Werck-Reichhart, Institute of Plant Molecular Biology of CNRS, UPR 2357, University of Strasbourg, France   Background: Flowers have an essential role: they ensure plant reproduction. Flowers of the […]

Keeping an Eye on Lutein Stability

Carotenoid pigments not only produce the vibrant yellows and oranges of flowers, fruits, and autumn leaves, but they also are important in both plant and human health. They act both as accessory pigments in photosynthetic light harvesting and as photoprotectants that absorb excess energy during photosynthesis.  β-carotene is a well-known dietary carotenoid that, when converted […]

Enhancing wheat Rubisco activase thermostability by mutagenesis of conserved residues from heat-adapted species

Maria Grazia Annunziata Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany. Annunziata@mpimp-golm.mpg.de ORCID ID: 0000-0001-8593-1741 Rubisco (ribulose-1,5-bisphosphate carboxylase/oxygenase) is the central enzyme of photosynthetic carbon assimilation in the Calvin-Benson-Bassham (CBB) cycle. It catalyses the carboxylation of one molecule of ribulose-1,5-bisphosphate (RuBP) producing two molecules of 3-phosphoglycerate (3PGA), from which sugars, starch, amino acids […]

How Autophagy Is Activated under Extended Dark Conditions

Huang et al. uncover how SnRK1 kinase complex promotes the autophagy activity by phosphorylating ATG6 under prolonged dark conditions. Plant Cell https://doi.org/10.1105/tpc.19.00066 By Huang Xiao and Faqiang Li, College of Life Sciences, South China Agricultural University, Guangzhou, China Background: Plants have evolved a catabolic process called autophagy (‘self-eating’) to promote their survival under nutrient starvation […]

Comparing genes that govern flower development in Petunia and Arabidopsis: Evolution made a mess!

Morel et al. investigate AP1/SEP/AGL6 MADS-box transcription factor functions in Petunia. Plant Cell https://doi.org/10.1105/tpc.19.00162 By Michiel Vandenbussche Background: The ABCE model is a simple genetic model that explains how the different floral organs in the flower (sepals, petals, stamens and carpels) acquire their identity based on the combinatorial action of 4 classes of genes (A,B,C […]

Camelina: A History of Polyploidy, Chromosome Shattering, and Recovery

Following formation of a polyploid plant, cells need to manage issues such as gene dosage and chromosome pairing/segregation to help the formerly separate genomes get along in the same nucleus. As the genomes adjust, chromosomes may undergo recombination, rearrangements, gene loss, and other perturbations, some severe. In some cases, these perturbations mean extinction, but in […]

Burying your head in the sand: heading belowground to find future targets of selection in roots

Author: Skelton, Robert Paul skelrob@berkeley.edu Institution: Department of Integrative Biology, University of California Berkeley, Berkeley, CA, 94720. Burying one’s head in the sand is usually synonymous with avoiding an issue, but in this volume of Plant Physiology Colombi et al. (2019) delve belowground to tackle an important topic in the ongoing quest to improve crop […]