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Title: Amelioration of ozone-induced oxidative damage in wheat plants grown under high carbon dioxide: Role of antioxidant enzymes

Abstract

O{sub 3}-induced in growth, oxidative damage to protein, and specific activities of certain antioxidant enzymes were investigated in wheat plants (Triticum aestivum L. cv Roblin) grown under ambient or high CO{sub 2}. High CO{sub 2} enhanced shoot biomass. The shoot biomass was relatively unaffected in plants grown under a combination of high CO{sub 2} and O{sub 3}. O{sub 3} exposure under ambient CO{sub 2} decreased photosynthetic pigments, soluble proteins, and ribulose-1,5-bisphosphate carboxylase/oxygenase protein and enhanced oxidative damage to proteins, but these effects were not observed in plants exposed to O{sub 3} under high CO{sub 2}. O{sub 3} exposure initially enhanced the specific activities of superoxide dismutase, peroxidase, glutathione reductase, and ascorbate peroxidase irrespective of growth in ambient or high CO{sub 2}. O{sub 3} exposure initially enhanced the specific activities of superoxide dismutase, peroxidase, glutathione reductase, and ascorbate peroxidase irrespective of growth in ambient or high CO{sub 2}. However, the specific activities decreased in plants with prolonged exposure to O{sub 3} under ambient CO{sub 2} but not in plants exposed to O{sub 3} under high CO{sub 2}. Native gels revealed preferential changes in the isoform composition of superoxide dismutase, peroxidases, and ascorbate peroxidase of plants grown under a combination of highmore » CO{sub 2} and O{sub 3}. Furthermore, growth under high CO{sub 2} and O{sub 3} led to the synthesis of one new isoform of glutathione reductase. This could explain why plants grown under a combination of high CO{sub 2} and O{sub 3} are capable of resisting O{sub 3}-induced damage to growth and proteins compared to plants exposed to O{sub 3} under ambient CO{sub 2}. 66 refs., 8 figs., 1 tab.« less

Authors:
; ;  [1]
  1. Univ. of Guelph, Guelph, Ontario (Canada)
Publication Date:
OSTI Identifier:
245416
Resource Type:
Journal Article
Journal Name:
Plant Physiology (Bethesda)
Additional Journal Information:
Journal Volume: 109; Journal Issue: 2; Other Information: PBD: Oct 1995
Country of Publication:
United States
Language:
English
Subject:
56 BIOLOGY AND MEDICINE, APPLIED STUDIES; OZONE; RESPONSE MODIFYING FACTORS; BIOLOGICAL EFFECTS; CARBON DIOXIDE; WHEAT; PLANT GROWTH; BIOLOGICAL PATHWAYS; BIOLOGICAL ADAPTATION

Citation Formats

Rao, M V, Hale, B A, and Ormrod, D P. Amelioration of ozone-induced oxidative damage in wheat plants grown under high carbon dioxide: Role of antioxidant enzymes. United States: N. p., 1995. Web.
Rao, M V, Hale, B A, & Ormrod, D P. Amelioration of ozone-induced oxidative damage in wheat plants grown under high carbon dioxide: Role of antioxidant enzymes. United States.
Rao, M V, Hale, B A, and Ormrod, D P. Sun . "Amelioration of ozone-induced oxidative damage in wheat plants grown under high carbon dioxide: Role of antioxidant enzymes". United States.
@article{osti_245416,
title = {Amelioration of ozone-induced oxidative damage in wheat plants grown under high carbon dioxide: Role of antioxidant enzymes},
author = {Rao, M V and Hale, B A and Ormrod, D P},
abstractNote = {O{sub 3}-induced in growth, oxidative damage to protein, and specific activities of certain antioxidant enzymes were investigated in wheat plants (Triticum aestivum L. cv Roblin) grown under ambient or high CO{sub 2}. High CO{sub 2} enhanced shoot biomass. The shoot biomass was relatively unaffected in plants grown under a combination of high CO{sub 2} and O{sub 3}. O{sub 3} exposure under ambient CO{sub 2} decreased photosynthetic pigments, soluble proteins, and ribulose-1,5-bisphosphate carboxylase/oxygenase protein and enhanced oxidative damage to proteins, but these effects were not observed in plants exposed to O{sub 3} under high CO{sub 2}. O{sub 3} exposure initially enhanced the specific activities of superoxide dismutase, peroxidase, glutathione reductase, and ascorbate peroxidase irrespective of growth in ambient or high CO{sub 2}. O{sub 3} exposure initially enhanced the specific activities of superoxide dismutase, peroxidase, glutathione reductase, and ascorbate peroxidase irrespective of growth in ambient or high CO{sub 2}. However, the specific activities decreased in plants with prolonged exposure to O{sub 3} under ambient CO{sub 2} but not in plants exposed to O{sub 3} under high CO{sub 2}. Native gels revealed preferential changes in the isoform composition of superoxide dismutase, peroxidases, and ascorbate peroxidase of plants grown under a combination of high CO{sub 2} and O{sub 3}. Furthermore, growth under high CO{sub 2} and O{sub 3} led to the synthesis of one new isoform of glutathione reductase. This could explain why plants grown under a combination of high CO{sub 2} and O{sub 3} are capable of resisting O{sub 3}-induced damage to growth and proteins compared to plants exposed to O{sub 3} under ambient CO{sub 2}. 66 refs., 8 figs., 1 tab.},
doi = {},
journal = {Plant Physiology (Bethesda)},
number = 2,
volume = 109,
place = {United States},
year = {1995},
month = {10}
}