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Poster communications

The Effect of Acute Ozone Treatment on Carbon Metabolism Enzymes of Arabidopsis thaliana mutant

Abstract : In this study we analyzed the changes in activities of several carbon metabolism enzymes from the ozone-sensitive mutant rcd1 (rcd1) and the ozone-tolerant wild type Columbia (col-0) of A.thaliana in response to acute ozone treatment. During the treatment, plants were fumigated with 350 ppb for 6 hours and the whole rosettes were collected immediately at the end of the exposure (6h), 24 hours and 48 hours respectively, following the treatment. The ozone treatment implicated a decrease in rubisco activity in rcd1 and col-0 plants. A similar response was also obtained for plants exposed to chronic ozone treatment (Dizengremel, 2001). Distinguishably (in opposition), changes in PEPc activity differed from the chronic treatment with a slight inhibition for the wild type. For col-0 and rcd1 plants, the acute treatment yielded an increase in both activities of ME and G6PH. For col-0, this enzymes stimulation reached already a high level at the end of the exposure period (6h). For rcd1, the stimulation was more progressive, with the highest value measured 48 hours following the fumigation. The activation of these NADP-dependent enzymes may highlight their role in reducing power supply and should perhaps be defined as one of the major events in the plant detoxification process.
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Poster communications
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Submitted on : Saturday, June 6, 2020 - 3:36:41 PM
Last modification on : Wednesday, March 16, 2022 - 3:35:04 AM


  • HAL Id : hal-02818304, version 1
  • PRODINRA : 42165



Ata Allah Dghim, Didier Le Thiec, Marie-Paule Hasenfratz-Sauder, Marie-Noëlle Vaultier, Pierre Dizengremel, et al.. The Effect of Acute Ozone Treatment on Carbon Metabolism Enzymes of Arabidopsis thaliana mutant. 24. New Phytologist Symposium. Plant Respiration and climate change : scaling from mitochondria to the globe, Apr 2010, Oxford, United Kingdom. n.p., 2010. ⟨hal-02818304⟩



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