Reduction of paraquat toxicity in maize leaves by benzyladenine


DURMUŞ N. , Kadıoğlu A.

ACTA BIOLOGICA HUNGARICA, vol.56, pp.97-107, 2005 (Journal Indexed in SCI) identifier identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 56
  • Publication Date: 2005
  • Doi Number: 10.1556/abiol.56.2005.1-2.10
  • Title of Journal : ACTA BIOLOGICA HUNGARICA
  • Page Numbers: pp.97-107

Abstract

The protective effect of a cytokinin benzyladenine (BA), against toxicity of paraquat (PQ), a widely used herbicide and a well-known oxidative stress inducer, was investigated in the leaves of maize. Maize leaves have been pretreated with BA at concentrations of 1, 10 and 100 mu M and afterwards treated with PQ. At all concentrations tested, BA retarded PQ-induced decreases in chlorophyll, carotenoid and ascorbic acid contents. Pretreatment with 10 and 100 mu M of BA significantly increased superoxide dismutase (SOD) activity after 8 h of PQ treatment but there was no significant change in SOD activity in the leaves pretreated with BA at 12 and 24 h. However, peroxidase activity significantly increased in 100 mu M of BA pretreated leaves. Results indicate that pretreatment with BA reduce PQ toxicity and BA-treated plants might become more tolerant against oxidative stress.