Developmental priming of stomatal sensitivity to abscisic acid by leaf microclimate

Curr Biol. 2013 Sep 23;23(18):1805-11. doi: 10.1016/j.cub.2013.07.050. Epub 2013 Sep 12.


Plant water loss and CO2 uptake are controlled by valve-like structures on the leaf surface known as stomata. Stomatal aperture is regulated by hormonal and environmental signals. We show here that stomatal sensitivity to the drought hormone abscisic acid (ABA) is acquired during leaf development by exposure to an increasingly dryer atmosphere in the rosette plant Arabidopsis. Young leaves, which develop in the center of the rosette, do not close in response to ABA. As the leaves increase in size, they are naturally exposed to increasingly dry air as a consequence of the spatial arrangement of the leaves, and this triggers the acquisition of ABA sensitivity. Interestingly, stomatal ABA sensitivity in young leaves is rapidly restored upon water stress. These findings shed new light on how plant architecture and stomatal physiology have coevolved to optimize carbon gain against water loss in stressing environments.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Abscisic Acid / pharmacology
  • Arabidopsis / drug effects
  • Arabidopsis / growth & development
  • Arabidopsis / physiology*
  • Desiccation
  • Microclimate*
  • Plant Leaves / drug effects
  • Plant Leaves / growth & development
  • Plant Leaves / physiology
  • Plant Stomata / drug effects
  • Plant Stomata / physiology*
  • Plant Transpiration
  • Stress, Physiological
  • Water / metabolism


  • Water
  • Abscisic Acid