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Title: Differential gene expressions of rice superoxide dismutase isoforms to oxidative and environmental stresses .
Author: Kaminaka H Morita S Tokumoto M Masumura T Tanaka K
Journal: Free Radic . Res . Citation: V : 31 Suppl ( ) P : S219-25 Year: 1999 Type: ARTICLE
Literature: oryza Field: abstract Doc ID: pub10694063 Accession (PMID): 10694063
Abstract: Active oxygen species ( AOSs ) are produced under stress conditions of plant cells . Superoxide dismutase ( SOD ) catalyzes the first step in the AOS scavenging system . The responses of SOD genes to environmental stresses were analyzed in rice seedlings by the treatments of drought , salinity and chilling . The expressions of abscisic acid ( ABA ) -inducible genes , Mn-SOD gene ( sodA1 ) and one of the cytosolic Cu/Zn-SOD genes ( sodCc2 ) , were strongly induced by the treatment of drought and salinity . While Fe-SOD gene ( sodB ) and the other cytosolic Cu/Zn-SOD gene ( sodCc1 ) were also induced by ABA . However the mRNA level of sodB was decreased by drought treatment , and sodCc1 gene was not induced by drought and salinity treatments . Plastidic Cu/Zn-SOD gene ( sodCp ) quickly responded to salinity treatment in the light but not in the dark . In the treatment with hydrogen peroxide , sodCp gene was strongly induced shortly after the treatment . These results suggested that phytohormone and AOSs are associated with the regulation of SOD genes under environmental stresses .
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[ Sen. 4, subscore: 1.00 ]: The expressions of abscisic acid ( ABA ) -inducible genes , Mn-SOD gene ( sodA1 ) and one of the cytosolic Cu/Zn-SOD genes ( sodCc2 ) , were strongly induced by the treatment of drought and salinity .
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