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. 1975 Jul;56(1):140–142. doi: 10.1104/pp.56.1.140

The Metabolism of Oat Leaves during Senescence

IV. The Effects of αα′-Dipyridyl and other Metal Chelators on Senescence 1

Richard M Tetley a,2, Kenneth V Thimann a
PMCID: PMC541313  PMID: 16659244

Abstract

The senescence of the first leaves of light-grown Avena seedlings when detached and placed in the dark is inhibited by α, α′-dipyridyl and α, α′, α″-tripyridyl at concentrations between 10−5 and 10−4 M. Five other chelating agents exert similar inhibiting effects at concentrations 3 to 30 times higher. The senescence of etiolated leaves, as shown by loss of carotenoid and protein, is similarly inhibited. Ethylene-diaminetetraacetate has a similar effect in the dark, though only at 10 mM and above, but in the light it causes bleaching of chlorophyll. It is deduced that an iron-containing system plays an essential part in the initiation of the senescence process.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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