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• W1966134920 abstract "In this study, the effect of long‐term plum pox virus (PPV) infection on the response of certain antioxidant enzymes at the subcellular level was studied in peach plants ( Prunus persica (L.) Batch) (cv. GF305), which are characterized by great susceptibility to the virus. In infected plants, a decrease in the efficiency of excitation energy capture by PSII ( F v ′/ F m ′) was observed, which was accompanied by a decrease in non‐photochemical quenching (NPQ). p ‐Hydroxy‐mercury benzoic acid (pHMB)‐insensitive ascorbate peroxidase (APX) activity (class III peroxidase) was detected in both chloroplast and soluble fractions. In soluble fractions from inoculated peaches, a significant increase in pHMB‐sensitive APX activity and a significant decrease in superoxide dismutase (SOD) activity were observed. These changes were correlated with the observations in isolated chloroplasts, where an increase in both pHMB‐sensitive and pHMB‐insensitive APX activities was observed, whereas significant decreases in SOD, monodehydroascorbate reductase (MDHAR) and glutathione reductase (GR) activities were produced. According to these results, as a consequence of PPV infection, an oxidative stress, indicated by an increase in lipid peroxidation and protein oxidation, was produced in peach leaves, which was monitored by the diaminobenzidine (DAB) peroxidase‐coupled H 2 O 2 probe. PPV infection produced an alteration in chloroplast ultrastructure, giving rise to dilated thylakoid membranes. PPV‐infected peach leaves showed a decreased amount of starch in chloroplasts from palisade parenchyma, as well as an increase in the number and size of plastoglobuli, in relation to control plants. The results suggest that long‐term PPV infection produces an oxidative stress, and that an antioxidative metabolism imbalance may be related to the progress of PPV infection and symptoms in peach plants." @default.
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• W1966134920 date "2004-11-25" @default.
• W1966134920 modified "2023-10-18" @default.
• W1966134920 title "Oxidative stress induced by long-term plum pox virus infection in peach (Prunus persica)" @default.
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• W1966134920 doi "https://doi.org/10.1111/j.1399-3054.2004.00431.x" @default.
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