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NADP-dependent isocitrate dehydrogenase (NADP-ICDH) catalyses the production of NADPH, which is an essential component in the cellular homeostasis. In Arabidopsis, the kinetic parameters (Km and Vmax) of cytosolic NADP-ICDH were different in leaves and roots. In vitro applied H2O2 did not affect the NADP-ICDH activity in either organ, however, the reduced glutathione inhibited the activity in leaves...
The role of peroxisomes in the oxidative injury induced by the auxin herbicide 2,4-dichlorophenoxyacetic acid (2,4-D) in leaves of pea (Pisum sativum L.) plants was studied. Applications of (2,4-D) on leaves or to root substrate increased the superoxide radical production in leaf peroxisomes. Foliar application also increased H2O2 contents in leaf peroxisomes. Reactive oxygen species (ROS) overproduction...
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