Role of Abscisic Acid and Proline Treatment on Induction of Antioxidant Enzyme Activities and Drought Tolerance Responses of Laurus Nobilis L. Seedlings
Makaleler > Tam Makale · 2007
Yazarlar: Lale AKTAŞ, Bengü Türkyılmaz, Hülya Akça, Salih Parlak
, Uluslararası, 2007, cilt 28, ss 14-27
Özet
The purpose of this study was to investigate exhibited physiological and biochemical drought tolerance responses of Laurus nobilis L. seedlings by abscisic acid (ABA) and proline treatment to dormant seeds. Abscisic acid and proline was applied to the dormant seeds by imbibitions in sterile water containing 100µM ABA, 1mM proline and ABA + proline combination and maintained at +4 °C for 3 weeks. Seedlings were obtained from 4 week stratified seeds sown in pots and were watered regularly during six month. In the leaves of seedlings, the highest activities of superoxide dismutase and catalase were observed in ABA treated and the highest peroxidase activity was measured in the leaves of ABA + proline combination treated group. ABA caused induction of drought tolerance responses was determined by enhancement of paraquat tolerance, proline content, and decreasing of leaf area compared to control. The ABA treatment to dormant seeds can be use for providing drought tolerance ability to seedlings of laurel and its negative effect on growth can be reversed by proline treatment in combination with ABA.