publication . Other literature type . Article . 1999

Hydrogen peroxide is generated systemically in plant leaves by wounding and systemin via the octadecanoid pathway

Orozco-Cardenas, M.; Ryan, C. A.;
Open Access English
  • Published: 25 May 1999
  • Publisher: The National Academy of Sciences
Abstract
Hydrogen peroxide (H2O2) generated in response to wounding can be detected at wound sites and in distal leaf veins within 1 hr after wounding. The response is systemic and maximizes at about 4–6 hr in both wounded and unwounded leaves, and then declines. The timing of the response corresponds with an increase in wound-inducible polygalacturonase (PG) mRNA and enzyme activity previously reported, suggesting that oligogalacturonic acid (OGA) fragments produced by PG are triggering the H2O2 response. Systemin, OGA, chitosan, and methyl jasmonate (MJ) all induce the accumulation of H2O2 in leaves. Tomato plants transformed with an antisense prosystemin gene produce ...
Subjects
Medical Subject Headings: integumentary systemfood and beverages
free text keywords: Biological Sciences, Methyl jasmonate, chemistry.chemical_compound, chemistry, Signal transduction, Systemin, Reactive oxygen species, chemistry.chemical_classification, Arabidopsis thaliana, biology.organism_classification, biology, Biochemistry, Mutant, Octadecanoid pathway, Cell biology, Enzyme assay, biology.protein
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