N M Atherton, G A Hendry, K Möbius, M Rohrer, J T Törring
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A free radical ubiquitously associated with senescence in plants: evidence for a quinone.
The interpretation of EPR and ENDOR measurements on an organic free radical which appears to be a universal concomitant of senescence in plants is discussed. On the basis of EPR spectra obtained at 95 GHz it is speculated that the radical is derived from a quinone.