Effect of combined stress on the O-2 scavenging enzyme activities in bean and poplar leaves

Wounding, Drought, Elicitation, Catalase, Peroxidase The activity of O-2-sc avenging enzymes in bean leaves in different positions and poplar leaves in different leaf storeys was investigated. The effects of wounding, elicitat ion and drought and the combination of these treatments at various levels w ere studied. Distal bean leaves showed higher responsiveness than those opposite the tre ated leaves. Poplar leaves above the treated ones proved to be more active than those in lower storeys. A comparison of the interaction of different s tress treatments revealed both synergistic and antagonistic effects on the oxidant-generating rate and anti-oxidant synthesis of damaged and non-damag ed plant tissues.