Seasonal Variation of Glutathione and Glutathione Reductase in Needles of <i>Picea abies</i>

Abstract

In spruce (Picea abies) needles glutathione and glutathione reductase show a periodic seasonal variation with significantly increased levels during the winter. It is proposed that glutathione and glutathione reductase play an important role for the winter hardiness of leaves from evergreen plants.