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Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/17274
Título

Influence of Brassinosteroids on Antioxidant Enzymes Activity in Tomato Under Different Temperatures

AutorMazorra, L. M.; Núñez, M.; Hechavarria, M.; Coll, Francisco; Sánchez-Blanco, María Jesús
Palabras claveBrassinosteroid analogue
Catalase
Heat stress
Lycopersicon esculentum
Peroxidase
Superoxide dismutase
Fecha de publicación3-nov-2004
EditorSpringer
CitaciónBiologia Plantarum, 45: 593-596(2004)
ResumenThe effect of brassinosteroids (BRs) on catalase (EC 1.11.1.6), peroxidase (EC 1.11.1.7) and superoxide dismutase (SOD, EC 1.15.1.1) activity in tomato leaf discs was analyzed at 25 and 40 °C. Tomato leaf discs were preincubated for 24 h in Petri dishes with 24-epibrassinolide (EBR) or a polyhydroxylated spirostanic analogue of brassinosteroids (MH5). Both concentrations (10.60 and 2.12 nM) of EBR and MH5 stimulated the activity of SOD at 25 and 40 °C, the MH5-stimulated increase of this enzyme activity was greater. Peroxidase activity was unaffected at 25 °C, while at 40 °C this activity was enhanced by both compounds. The changes in catalase activity markedly depended on the structure BRs, doses and temperature. The results suggest a possible role of EBR and MH5 in the reduction of cell damage produced by heat stress due to induction of enzymatic antioxidants.
Versión del editorhttp://dx.doi.org/10.1023/A:1022390917656
URIhttp://hdl.handle.net/10261/17274
DOI10.1023/A:1022390917656
ISSN0006-3134 (Print)
1573-8264 (Online)
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