Abstract
APPLICATION of ethylene to potato tubers induces a respiratory upsurge1, comparable with that in ripening climacteric fruit2, but which can be studied independently of other ethylene-induced processes occurring in fruit. It has been suggested that ethylene catalyses oxygen-requiring processes, reflecting in part oxygen utilisation in the formation of peroxides3. We report here that high O2 tensions, in combination with ethylene, markedly enhance the respiratory rise, which is accompanied by a corresponding increase in peroxides.
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