Involvement of Hydrogen Peroxide in the Regulation of Senescence in Pear

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ID: 304398
1977
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Abstract
Endogenous peroxide levels in pear fruit (Pyrus communis) were measured using a titanium assay method, and were found to increase during senescence in both Bartlett and Bosc varieties. Application of glycolic acid or xanthine, serving as substrates for the formation of H(2)O(2), increased the peroxide content of the tissue and accelerated the onset of ripening, as measured by increased softening and ethylene evolution. Application of ethylene also induced increased peroxide levels. Ripening processes were similarly promoted when peroxides were conserved by inhibiting the activity of catalase with hydroxylamine or potassium cyanide. By comparison, the inhibition of glycolate oxidase with alphahydroxy-2-pyridinemethanesulfonic acid decreased the peroxide content of the tissue and delayed the onset of ripening. These results indicate that the onset of ripening correlates with the peroxide content of fruit tissues as occurring under normal conditions or as influenced by the treatments. Hydrogen peroxide may be involved in oxidative processes required in the initiation and the promotion of ripening.
Reference Key
openalex_W1978552571 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Thomas M. Brennan, Chaim Frenkel
Journal Plant physiology and biochemistry : PPB
Year 1977
DOI
10.1104/pp.59.3.411
URL
https://academic.oup.com/plphys/article-pdf/59/3/411/35583350/plphys_v59_3_411.pdf
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