Review: Growth-mediated plant movements: hidden in plain sight ($)

Time-lapse imaging reveals the slow movements of plants, such as phototropism and gravitropism. Harmer and Brooks review the molecular bases for these growth-mediated movements. While auxin has long been known to be involved in photo- and gravitropisms, new results show that ABA is involved in the movement of plants towards water (hydrotropism). The authors also describe autostraightening (realigning to the vertical after tropic bending), which is less well understood but involves proprioception and may involve mechanosensing and the actin/myosin cytoskeleton. (Summary by Mary Williams) Curr. Opin. Plant Biol. 10.1016/j.pbi.2017.10.003