Induction of a new isozyme of superoxide dismutase at low temperature inPotentilla astrisanguinea Lodd. variety argyrophylla (Wall. ex. Lehm)Griers

摘要

Exposing the plants of Potentilla astrisanguinea Lodd. variety argyrophylla (Wall. ex. Lehm) Griers to temperatures of 4 and -20 degreesC led to an increase in SOD activity compared to the control plants kept at 25 degreesC. Concomitantly, there was induction of a new, copper-zinc-SOD isozyme in Potentilla. Feeding the plant with cycloheximide stopped the induction of the new isozyme, indicating the possibility of a nuclear-encoded protein. Interestingly, the induced isozyme showed a prominent activity when the gel was developed at -20 degreesC.