The effect of blue light on energy levels in epidermal strips

Khaled‐Taha ‐T Agbariah, Nurit Roth‐Bejerano

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


Red light applied together with blue enhanced stomatal opening in epidermal strips of Commelina communis L. more than red light alone. In red light, stomatal opening was enhanced by exogenously applied ATP and was inhibited by 3‐(3,4‐dichlorophe‐nyl)‐l,l‐dimethylurea (DCMU), while in the presence of blue light external ATP was almost without effect, and DCMU stimulated stomatal opening. Blue light increased the ATP levels in the epidermal strips. DCMU diminished the amount of ATP in both red light and red + blue light treatments, but did not abolish the stimulatory effect of blue light. Blue light also stimulated the respiration rate of the epidermal strips. Rotenone, which inhibited stomatal opening and respiration rate, abolished the effect of blue light in both processes. These results imply that blue light increases the ATP levels by stimulation of oxidative phosphorylation.

Original languageEnglish
Pages (from-to)100-104
Number of pages5
JournalPhysiologia Plantarum
Issue number1
StatePublished - 1 Jan 1990


  • ATP levels
  • Commelina communis
  • blue light
  • red light
  • respiration
  • stomata

ASJC Scopus subject areas

  • Physiology
  • Genetics
  • Plant Science
  • Cell Biology


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