Alterations in antioxidant metabolism and associated enzymes in pea (Pisum sativum) exposed to sulfur dioxide
- Virginia Polytechnic Institute and State Univ., Blacksburg (USA)
The response of glutathione and ascorbate and the enzymes glutathione reductase (GR) and superoxide dismutase (SOD) was studied in two cultivars of pea known to be differentially sensitive to SO{sub 2} (0.8 ppm). Total glutathione accumulated more rapidly on exposure to SO{sub 2} in insensitive cultivar Progress compared to the sensitive cultivar Nugget, confirming our previous results. However, corresponding changes in oxidized glutathione were not observed and ascorbate levels did not change over the course of the exposure. Changes in the activity of GR corresponded to the changes in total glutatione levels. Preliminary results indicate that SOD activity increased to a significantly higher extent in Progress than in Nugget. These data suggest a significant role for GR and possibly SOD in resistance to oxidative stress.
- OSTI ID:
- 5629097
- Report Number(s):
- CONF-9007196--
- Journal Information:
- Plant Physiology, Supplement; (USA), Journal Name: Plant Physiology, Supplement; (USA) Vol. 93:1; ISSN PPYSA; ISSN 0079-2241
- Country of Publication:
- United States
- Language:
- English
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