Effect of N+ ion implantation on antioxidase activity in Blakeslea trispora

The effect of N+ implantation on the activities of CAT, POD, SOD, T-AOC and the capacities of scavenging O-2(-center dot) and OH center dot in Blakeslea trispora (-) were studied. Results showed that N+ implantation caused different changes of CAT, POD, SOD, T-AOC activities and cell scavenging O-2(-center dot) and OH center dot capacities. With the implantation dose increasing CAT activity was lower than the control sample. while POD, SOD activities and the scavenging O-2(-center dot) and OH center dot capacities all decreased at the beginning, and then increased lately. At the dose of 6.0 x 10(15) N-center dot cm(-2) T-AOC activity was lowest. while at the dose of 1.2 x 10(15) N+ cm(-2) its activity was highest, and this change trend was same to the B. trispora (-) survival rate Curve. So we speculated that the changes of these antioxidases activity of B. trispora (-) induced by low-energy N+ probably have some relationship with its "saddle shape" survival rate Curve. (C) 2008 Elsevier Ltd. All rights reserved.