Natural variation in Caenorhabditis briggsae mitochondrial form and function suggests a novel model of organelle dynamics

► Mitochondrial morphology depends on ΔψM but not on reactive oxygen species level ► Mitochondria surrounded by high-ΔψM populations are larger and more elongated ► Low-ΔψM mitochondrial populations exhibit greater morphological heterogeneity ► Organelle morphology depends on the functional state of the mitochondrial population