Differential Temperature Sensitivity of Pea Superoxide Dismutases | Zendy

John Burke | Zendy; Melvin J. Oliver | Zendy

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Differential Temperature Sensitivity of Pea Superoxide Dismutases

Author(s) -

John Burke,

Melvin J. Oliver

Publication year - 1992

Publication title -

plant physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.554

H-Index - 312

eISSN - 1532-2548

pISSN - 0032-0889

DOI - 10.1104/pp.100.3.1595

Subject(s) - superoxide dismutase , enzyme , sativum , pisum , malate dehydrogenase , biochemistry , chemistry , enzyme assay , staining , isozyme , biology , botany , genetics

The activity of pea (Pisum sativum L.) Cu/Zn and Mn superoxide dismutase isoforms was evaluated across a range of temperatures from 10 to 45 degrees C. Maximal activity of the Cu/Zn and Mn superoxide dismutase isoforms was observed at 10 degrees C. Both cytoplasmic and chloroplast Cu/Zn superoxide dismutases exhibit a reduction in staining intensity with increasing temperatures. Mn superoxide dismutase, however, maintained a relatively constant staining intensity across the range of temperatures evaluated. An unrelated enzyme used as a control, malate dehydrogenase, exhibited the expected increase in staining activity with increasing temperatures. These results describe a unique response of a protection enzyme to temperature.

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