Mitochondrial retrograde signaling through UCP1-mediated inhibition of the plant oxygen-sensing pathway (Curr Biol)
Plant Science Research WeeklyPlants have a plethora of oxygen requiring enzymes that are essential for survival. Mitochondria require oxygen to create ATP, yet during hypoxia they can alter gene expression in the nucleus through retrograde signaling, which may promote stress tolerance. Barreto et al. recently delineated a novel…
Ethylene augments root hypoxia tolerance through amelioration of reactive oxygen species and growth cessation (bioRxiv)
Plant Science Research WeeklyFlooding presents a dual threat to plants; not only is mitochondrial respiration supressed during the resulting hypoxic conditions, but once the floodwaters recede, the return to ambient oxygen levels triggers a cascade of harmful reaction oxygen species (ROS). One of the most well-studied responses…
Phosphatidic acid modulates MPK3- and MPK6- mediated hypoxia signaling in Arabidopsis (Plant Cell)
Plant Science Research WeeklyPlants experience changes in gene expression and cellular metabolism to improve their survival to abiotic stresses, such as hypoxia. It has been observed that environmental signals induce phospholipase D (PLD) which generates phosphatidic acid (PA) by cleaving membrane phospholipids. Indeed, submergence…