Influence of brassinosteroids on antioxidant enzymes activity in tomato under different temperatures

被引：133

作者：

Mazorra, LM

Núñez, M

Hechavarria, M

Coll, F

Sánchez-Blanco, MJ

机构：

[1] CSIC, Ctr Edafol & Biol Aplicada Segura, Dpto Riego & Salinidad, E-30080 Murcia, Spain

[2] Univ La Habana, Fac Quim, Lab Prod Nat, Havana, Cuba

[3] INCA, Dpto Fisiol & Bioquim Vegetal, Havana, Cuba

来源：

BIOLOGIA PLANTARUM | 2002年 / 45卷 / 04期

关键词：

brassinosteroid analogue; catalase; heat stress; Lycopersicon esculentum; peroxidase; superoxide dismutase;

D O I：

10.1023/A:1022390917656

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

The 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 degreesC. 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 degreesC, the MH5-stimulated increase of this enzyme activity was greater. Peroxidase activity was unaffected at 25 degreesC, while at 40 degreesC 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.

引用

页码：593 / 596

页数：4

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