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Inhibition by calcium of senescence of detached cucumber cotyledons: effect on ethylene and hydroperoxide production

Inhibition by calcium of senescence of detached cucumber cotyledons: effect on ethylene and hydroperoxide production

Plant Physiology 71(1): 182-186

ISSN/ISBN: 0032-0889

PMID: 16662782

DOI: 10.1104/pp.71.1.182

Detached cucumber (cv. Heinz Pickling) cotyledons floating on 10-4M CaCl2 had lower chlorophyll losses and H2O2 and ethylene production rates than cotyledons in water and did not undergo a burst in CO2 production. In contrast, 10-4M Mg had little effect on cotyledon senescence, whereas 10-4M K stimulated chlorophyll loss but did not increase H2O2 accumulation or ethylene or CO2 production.

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