Reduction of paraquat toxicity in maize leaves by benzyladenine
ACTA BIOLOGICA HUNGARICA, cilt.56, ss.97-107, 2005 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 56
- Basım Tarihi: 2005
- Doi Numarası: 10.1556/abiol.56.2005.1-2.10
- Dergi Adı: ACTA BIOLOGICA HUNGARICA
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.97-107
- Karadeniz Teknik Üniversitesi Adresli: Evet
Özet
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.