作者: Maor Matzrafi , Lidor Shaar-Moshe , Baruch Rubin , Zvi Peleg
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摘要: Climate change endangers food security and our ability to feed the ever-increasing human population. Weeds are most important biotic stress, reducing crop-plant productivity worldwide. Chemical control, main approach for weed management, can be strongly affected by temperature. Previously, we have shown that temperature-dependent non-target site (NTS) resistance of Brachypodium hybridum is due enhanced detoxification acetyl-CoA carboxylase inhibitors. Here, explored transcriptional basis this phenomenon. Plants were characterized response herbicide application, high-temperature their combination, in an attempt uncover genetic pinoxaden resistance. Even though variance among treatments was application (61%), plants able survive only when grown under high-temperatures. Biological pathways expression patterns members specific gene families, previously involved NTS metabolic different herbicides, examined. Cytochrome P450, glucosyl transferase glutathione-S-transferase genes found up-regulated both control conditions. However, biological related oxidation glucose conjugation significantly enriched combination high-temperature. Analysis reactive oxygen species (ROS) conducted at several time points after treatment using a probe detecting H2O2/peroxides. Comparison ROS accumulation revealed significant reduction quantities 24 h These results may indicate activity enzymatic scavengers correlated with activation herbicide-resistance mechanisms. This study shows up-regulation not sufficient explain We suggest elevated processes induce rapid efficient metabolism leading