Activities of antioxidant enzymes of Arabidopsis thaliana plants during cold hardening to hypothermia


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Changes in activities of the enzymes performing direct antioxidant functions were studied in 7–8-week-old plants Arabidopsis thaliana Heinh (L.) of Columbia (Col-0) ecotype. It was found that 5-day cold hardening at 2°C increased plant cold resistance to the subsequent stronger cooling. Under these conditions, the marked changes occurred in activities of superoxide dismutase and III type (guaiacol) peroxidses but not in that of catalase. The total peroxidase activity exceeded the catalase activity before cold hardening. Therefore, peroxidases are able to decompose more H2O2 than catalases and appear to make the dominant contribution to the protection from the cold damage.

Sobre autores

M. Sin’kevich

Timiryazev Institute of Plant Physiology

Autor responsável pela correspondência
Email: sinkevich_m@mail.ru
Rússia, Moscow, 127276

A. Selivanov

Timiryazev Institute of Plant Physiology

Email: sinkevich_m@mail.ru
Rússia, Moscow, 127276

O. Antipina

Timiryazev Institute of Plant Physiology

Email: sinkevich_m@mail.ru
Rússia, Moscow, 127276

E. Kropocheva

Moscow State University

Email: sinkevich_m@mail.ru
Rússia, Moscow, 119991

G. Alieva

Timiryazev Institute of Plant Physiology

Email: sinkevich_m@mail.ru
Rússia, Moscow, 127276

T. Suvorova

Timiryazev Institute of Plant Physiology

Email: sinkevich_m@mail.ru
Rússia, Moscow, 127276

N. Astakhova

Timiryazev Institute of Plant Physiology

Email: sinkevich_m@mail.ru
Rússia, Moscow, 127276

I. Moshkov

Timiryazev Institute of Plant Physiology

Email: sinkevich_m@mail.ru
Rússia, Moscow, 127276

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