Entries by Amna Mhamdi

Here, there and everywhere: Plastid- and nuclear-localized WHIRLY1 regulates salicylic acid homeostasis during developmental senescence

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Does a new job always come with a new location? Perhaps this is true for some plant proteins; half of the proteins are located in more than one subcellular compartment. Emerging evidence in plants shows that nuclear-encoded proteins undergo redox and posttranslational modifications or processing events that could initiate changes in their intracellular localization as […]

To grow or not to grow: specific lipoxygenases control wound-induced growth restriction

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To grow or not to grow: specific lipoxygenases control wound-induced growth restriction Amna Mhamdi Ghent University, Department of Plant Biotechnology and Bioinformatics, and VIB Center for Plant Systems Biology, 9052 Ghent, Belgium Address correspondence to: [email protected] As most vegetable growers know, plants have a lot of predators. Repetitive wounding events caused by herbivorous insects and […]

MYB30 links the ROS wave to systemic acclimation

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Amna Mhamdi Ghent University, Department of Plant Biotechnology and Bioinformatics, and VIB Center for Plant Systems Biology, 9052 Ghent, Belgium Address correspondence to [email protected] Stress signals trigger systemic signaling and acclimation. The propagation of reactive oxygen species (ROS) from the tissue that initially sense the stress stimuli to distant ones or to the entire plant […]

Keep sugar away to stay active: glycosylation of methyl salicylate shuts down systemic signaling

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Plant hormones are frequently modified by glycosylation, hydroxylation, methylation and other conjugations, and these modifications can alter the hormone’s activity and stability (Wang et al., 2019). The phytohormone salicylic acid orchestrates effective defense and mediates local and systemic-acquired resistance (SAR) against biotrophic pathogens such as the bacterium Pseudomonas syringae. Reversible glucose conjugation of salicylic acid […]

A novel specialized immune player: BSK5 is required for restricting pathogen progression

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Amna Mhamdi, Ghent University, Department of Plant Biotechnology and Bioinformatics, and VIB Center for Plant Systems Biology, 9052 Ghent, Belgium Defense reactions are the fascinating result of a complex network between signals, receptors and effectors, where any missed nodes may spell disaster. At the cell surface, receptors and receptor-like kinases (RLK) recognize ligands and activate signaling […]

Managing Competing Interests: Partitioning S between Glutathione and Protein Synthesis

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Sulfur (S) is an essential element for cell function and responses to the environment. The primary S source is sulfate, which, following uptake by specific transporters, is reduced and incorporated into the amino acids Cysteine (Cys) and Methionine, and thereafter into proteins and peptides, including the multifunctional tripeptide thiol glutathione (Takahashi et al., 2011). Cys […]