RELATIONSHIP BETWEEN GLUTATHIONE AND DARK-INDUCED SENESCENCE OF BRASSICA-CAMPESTRIS

The effects of compounds that influenced the redox condition on the se nescence of detached Brassica campestris leaves were examined. Glutath ione treatment promoted the senescence of detached Brassica leaves in the dark. Glutathione treatment also increased the rate of respiration and serine content in the dark, The buthionine sulfoxisamine (a poten t and specific inhibitor of gamma-glutamylcystein synthetase (EC 6.3.2 .2)) strongly suppressed leaf senescence. These findings suggest that the intracellular glutathione concentration may be involved in importa nce for leaf senescence.