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Plants in the field are subjected to numerous environmental stresses. Lengthy continuation of such environmental stresses or a rapid increase in their intensity is harmful to vegetation. Assessments of the phytotoxicity of various stresses have been performed in many countries, although they have largely been based on estimates of leaf injury. We developed a novel method of detecting plant stresses...
Plants have various systems for scavenging active oxygen species. Ascorbate peroxidase (APX), a component of one of these systems, is involved in scavenging hydrogen peroxide. We isolated and characterized an Arabidopsis thaliana mutant deficient in a gene (APX1) for cytosolic APX. In this mutant (apx1), expression of APX1 was not detected at either the mRNA or protein level, and APX activity in a...
Abstract. We compared the physiological and molecular responses of two Arabidopsis accessions, Col-0 and Ws-2, to ozone (O3) exposure. Observation of visible injury as well as ion-leakage analysis demonstrated clear differences between the O3-tolerant accession Col and the O3-sensitive accession Ws. RNA-blot analysis showed that O3-induced increases in mRNA levels of several ethylene-inducible genes...
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