Effect of tobacco mosaic virus infection of levels of soluble superoxide dismutase (SOD) in nicotiana tabacum and nicotiana glutinosa leaves

Local and Systemic Responses of Antioxidants to Tobacco Mosaic Virus Infection and to Salicylic Acid in Tobacco (Role in Systemic Acquired Resistance)

“…Later, however, the SOD activity (especially Cu,Zn-SOD bands) started to increase in infected leaves, as observed previously by Montalbini and Buonaurio (1986).…”

The generation of oxygen radicals during host plant responses to infection

“…They observed significant increases in cyanide-sensitive CuZnSOD during the hypersensitive response of bean [Phaseolus vulgaris) to bean rust (Uromyces phaseoli) which were not observed in compatible infections. In tobacco leaves infected with tobacco mosaic virus, hypersensitively-reacting tissues showed higher levels of both the Cu-Zn and Mn forms of SOD than susceptible leaves [95]. However, in both investigations, the relative enhancement of SOD activity in hypersensitive tissue was greatly exceeded by an increase in peroxidase activity, suggesting that despite the rise in SOD levels, a net increase in the level of cellular oxidants, due to the increased peroxidase activity, was likely.…”

Isolation, Chromosomal Localization, and Differential Expression of Mitochondrial Manganese Superoxide Dismutase and Chloroplastic Copper/Zinc Superoxide Dismutase Genes in Wheat1

“…Both chloroplasts and mitochondria can produce active oxygen species either under normal growth conditions or during exposure to various stresses. The PSI electron-transport chain contains a number of autooxidizable enzymes that reduce O 2 to superoxide (Badger, 1985; Asada and Takahashi, 1987; Asada, 1994), and evidence indicates that superoxide and H 2 O 2 can also be produced by PSII under high-light intensities (Landgraf et al, 1995).During mitochondrial respiration, reactive oxygen species are also generated via the reactions of the electrontransport chain (Rich and Bonner, 1978;Bowler et al, 1991).Active oxygen species are also generated during chemical and environmental stresses, including chilling and freezing (Wise and Naylor, 1987;Senaratna et al, 1988; Kendall and McKersie, 1989;Tsang et al, 1991;McKersie et al, 1993), drought (Perl-Treves and Galun, 1991; Price and Hendry, 1991), desiccation (Senaratna et al, 1985;Leprince et al, 1990), flooding (Hunter et al, 1983;Van Toai and Bolles, 1991), herbicide treatment (Malan et al, 1990; Kurepa et al, 1997), pathogen attack (Montalbini and Buonaurio, 1986; Buonaurio et al, 1987; Koch and Slusarenko, 1990), and ionizing radiation (Niwa et al, 1977).SODs are a group of metalloenzymes that protect cells from superoxide radicals by catalyzing the dismutation of the superoxide radical to molecular O 2 and H 2 O 2 . SODs are categorized into two families with unrelated DNA sequences.…”

“…Active oxygen species are also generated during chemical and environmental stresses, including chilling and freezing (Wise and Naylor, 1987;Senaratna et al, 1988; Kendall and McKersie, 1989;Tsang et al, 1991;McKersie et al, 1993), drought (Perl-Treves and Galun, 1991; Price and Hendry, 1991), desiccation (Senaratna et al, 1985;Leprince et al, 1990), flooding (Hunter et al, 1983;Van Toai and Bolles, 1991), herbicide treatment (Malan et al, 1990; Kurepa et al, 1997), pathogen attack (Montalbini and Buonaurio, 1986; Buonaurio et al, 1987; Koch and Slusarenko, 1990), and ionizing radiation (Niwa et al, 1977).…”