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. 1975 Jul;56(1):140-2.
doi: 10.1104/pp.56.1.140.

The Metabolism of Oat Leaves during Senescence: IV. The Effects of alphaalpha'-Dipyridyl and other Metal Chelators on Senescence

R M Tetley  1 , K V Thimann
Affiliations

The Metabolism of Oat Leaves during Senescence: IV. The Effects of alphaalpha'-Dipyridyl and other Metal Chelators on Senescence

R M Tetley et al. Plant Physiol. 1975 Jul.

Abstract

The senescence of the first leaves of light-grown Avena seedlings when detached and placed in the dark is inhibited by alpha, alpha'-dipyridyl and alpha, alpha', alpha''-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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References

    1. Nature. 1970 Dec 19;228(5277):1224-5 - PubMed
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    1. Plant Physiol. 1971 Nov;48(5):645-7 - PubMed
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