Involvement of superoxide radical in signal transduction regulating stomatal movements

Sharad B Purohit, G. Pradeep Kumar, Malini Laloraya, Manmohan M. Laloraya

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Stomatal movements are regulated by alternate phase transition in the lipophilic domains of membrane initiated by blue light through activation of plasmalemma redox system. ABA blocks the blue light activated redox reactions leading to the accumulation of superoxide (O ·- 2 ) radical inducing melting of the membrane and increased fluidity. Phenolic compounds which reverse the ABA effects reduce O ·- 2 radical and thereby reverse phase transition in lipophilic domains of membrane. Stomatal movements thus appear to be regulated by blue light activated redox reactions involving formation of O ·- 2 radical and its reduction by the reducing equivalents available in the GCPs.

Original languageEnglish (US)
Pages (from-to)30-37
Number of pages8
JournalBiochemical and Biophysical Research Communications
Volume205
Issue number1
DOIs
StatePublished - Nov 30 1994
Externally publishedYes

Fingerprint

Signal transduction
Superoxides
Oxidation-Reduction
Signal Transduction
Redox reactions
Phase Transition
Membranes
Light
Phase transitions
Membrane Fluidity
Fluidity
Freezing
Melting
Chemical activation

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology

Cite this

Involvement of superoxide radical in signal transduction regulating stomatal movements. / Purohit, Sharad B; Pradeep Kumar, G.; Laloraya, Malini; Laloraya, Manmohan M.

In: Biochemical and Biophysical Research Communications, Vol. 205, No. 1, 30.11.1994, p. 30-37.

Research output: Contribution to journalArticle

Purohit, Sharad B ; Pradeep Kumar, G. ; Laloraya, Malini ; Laloraya, Manmohan M. / Involvement of superoxide radical in signal transduction regulating stomatal movements. In: Biochemical and Biophysical Research Communications. 1994 ; Vol. 205, No. 1. pp. 30-37.
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