EurekaMag.com logo
+ Site Statistics
References:
53,623,987
Abstracts:
29,492,080
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on LinkedInFollow on LinkedIn

+ Translate

Differential regulation of superoxide dismutases in plants exposed to environmental stress



Differential regulation of superoxide dismutases in plants exposed to environmental stress



Plant Cell 3(8): 783-792



Superoxide dismutases (SODs) are metalloproteins that catalyze the dismutation of superoxide radicals to hydrogen peroxide and oxygen. The enzyme is ubiquitous in aerobic organisms where it plays a major role in defense against oxygen radical-mediated toxicity. In plants, environmental adversity often leads to the increased generation of reduced oxygen species and, consequently, SOD has been proposed to be important in plant stress tolerance. Here we describe the isolation of a cDNA clone encoding a cytosolic copper/zinc SOD from Nicotiana plumbaginifolia. Using this, together with previously isolated cDNAs encoding the mitochondrial manganese SOD and the chloroplastic iron SOD as probes in RNA gel blot analyses, we have studied SOD transcript abundance during different stress conditions: in response to light, during photoinhibitory conditions (light combined with high or low temperatures), and in response to a xenobiotic stress imposed by the herbicide paraquat. Evidence is presented that iron SOD mRNA abundance increases whenever there is a chloroplast-localized oxidative stress, similar to the previous finding that manganese SOD responds to mitochondria-localized events. The diverse effects of the different stress conditions on SOD mRNA abundance thus might provide an insight into the way that each treatment affects the different subcellular compartments.

(PDF same-day service: $19.90)

Accession: 002072754

Download citation: RISBibTeXText

PMID: 1820818

DOI: 10.1105/tpc.3.8.783



Related references

Differential expression of CuZn-superoxide dismutases in Pinus sylvestris needles exposed to SO2 and NO2. Physiologia Plantarum 85(4): 689-696, 1992

Water stress induces overexpression of superoxide dismutases that contribute to the protection of cowpea plants against oxidative stress. African Journal of Biotechnology 6(17): 1982-1986, 2007

Differential expression of superoxide dismutase genes in Nicotiana plumbaginifolia exposed to environmental stress conditions. Pell, E J, Steffen, K L Current Topics in Plant Physiology an American Society of Plant Physiologists Series; Active oxygen/oxidative stress and plant metabolism: 250-252, 1991

Effect of overexpression of wild-type and mutant Cu/Zn-superoxide dismutases on oxidative stress and cell death induced by hydrogen peroxide, 4-hydroxynonenal or serum deprivation: Potentiation of injury by ALS-related mutant superoxide dismutases and protection by Bcl-2. Journal of Neurochemistry 78(2): 209-220, July, 2001

Role of superoxide dismutases (SODs) in controlling oxidative stress in plants. Journal of Experimental Botany 53(372): 1331-1341, 2002

Gene regulation of rice superoxide dismutases in response to oxidative stress. Murata, N Research in photosynthesis, Vol IV: 545-548, 1992

Differential regulation of Cu, Zn- and Mn-superoxide dismutases by retinoic acid in normal and psoriatic human fibroblasts. Journal of Autoimmunity 24(1): 69-78, 2005

Differential regulation of manganese and copper/zinc superoxide dismutases by the facial nerve transection. Brain Research 582(2): 342-345, 1992

Gene regulation of the rice cytosolic copper/zinc-superoxide dismutases in response to environmental stresses. Asada, K, Yoshikawa, T International Congress Series; Frontiers of reactive oxygen species in biology and medicine 257-258, 1994

Molecular Responses to Photooxidative Stress in Pinus sylvestris (L.) (II. Differential Expression of CuZn-Superoxide Dismutases and Glutathione Reductase. Plant Physiology 103(4): 1385-1391, 1993

Differential expression of copper zinc superoxide dismutases in pinus sylvestris needles exposed to sulfur dioxide and nitrogen dioxide. Physiologia Plantarum 85(4): 689-696, 1992

Copper-zinc superoxide dismutases in Scots pine (Pinus sylvestris L.). Analyses of isoforms, cDNAs and environmental stress responses. Copper zinc superoxide dismutases in Scots pine Pinus sylvestris L Analyses of isoforms, cDNAs and environmental stress responses: 54 pp. + 69 pp., 1994

The superoxide dismutases of Bacillus anthracis do not cooperatively protect against endogenous superoxide stress. Journal of Bacteriology 188(11): 3837-3848, 2006