Strigolactones are common regulators in induction of stomatal closure in planta

Plant Signal Behav. 2018 Mar 4;13(3):e1444322. doi: 10.1080/15592324.2018.1444322. Epub 2018 Mar 13.

Abstract

Strigolactones (SLs) have been implicated in many plant biological processes, including growth and development and the acclimation to environmental stress. We recently reported that SLs intrinsically acted as prominent regulators in induction of stomatal closure. Here we present evidence that the effect of SLs on stotamal closure is not limited to Arabidopsis, and thus SLs could serve as common regulators in the modulation of stomatal apertures of various plant species. Nevertheless, TIS108, a SL-biosynthetic inhibitor, exerted no effect on stomatal apertures. In addition, the SL receptor mutant atd14-5, similar to SL-deficient and more axillary growth 2 (max2) mutants, exhibited hypersensitivity to drought stress. Altogether, these results reinforce the role of SLs as common regulators in stress resilience.

Keywords: Drought stress; stomatal closure; strigolactones.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Arabidopsis / drug effects
  • Arabidopsis / physiology*
  • Droughts
  • Hexanones / pharmacology
  • Lactones / metabolism*
  • Mutation / genetics
  • Plant Stomata / drug effects
  • Plant Stomata / physiology*
  • Stress, Physiological / drug effects
  • Triazoles / pharmacology
  • Vicia / drug effects
  • Vicia / physiology*

Substances

  • 6-phenoxy-1-phenyl-2-(1H-1,2,4-trizol-1-yl)hexan-1-one
  • Hexanones
  • Lactones
  • Triazoles

Grants and funding

National Natural Science Foundation of China (31200902, 31771556, 31271575); the 100-Talent Program of Shaanxi Province; Fundamental Research Funds for the Central Universities (GK201702016); Natural Science Foundation of Hubei Provincial Department of Education (Q20172103); and Initial Project for Post-Graduates of Hubei University of Medicine (2016QDJZR14).