Effect of salicylic acid on antioxidant enzyme activity and petal senescence in "Yellow Island" cut rose flowers

• Autorzy: Gerailoo S. , Ghasemnezhad M.

Warianty tytułu

PL

Wplyw kwasu salicylowego na aktywnosc enzymow oksydacyjnych oraz starzenie sie platkow cietej rozy "Yellow Island"

• Języki publikacji: EN

Abstrakty

EN

The effect of exogenous salicylic acid (SA) on the vase life of cut rose flowers was investigated. 'Yellow Island' roses were obtained from a commercial grower. The roses were pulse treated with SA (0, 50, 100, 150, 200 mg l-1) for 18 hours. Com­pared to the control treatment (DW), the greatest delay in senescence was obtained in cut roses treated with 150 mg l-1 SA. With this treatment, flower vase life was dou­bled. The physiological characteristics such as protein concentration, lipid peroxida- tion (MDA) level and enzyme activity such as lipoxygenase (LOX), superoxide dis- mutase (SOD) and peroxidase (POD) were measured only in the control (DW) and those kept in a solution of 150 mg l-1 salicylic acid (SA) for over 8 days of vase life. Degradation of protein and accumulation of MDA during vase life was shown to be suppressed by 150 mg l-1 SA. The activity of LOX and POD gradually increased with progressing flower senescence, while SOD activity declined. The flowers which had been pulsed with SA exhibited lower LOX and POD activity, and a higher activity of SOD. Overall, the results suggest that SA increases vase life by improving the anti- oxidant system and reducing oxidative stress damages during rose flower senescence.

PL

Badanie miało na celu określenie wpływu egzogennego kwasu salicylowego (SA) na kwiaty ciętej róży. Róże 'Yellow Island' pochodzące od hodowcy komercyjnego traktowane były w sposób pulsacyjny kwasem salicylowym (0, 50, 100, 150, 200 mgl-1) przez 18 godzin. W porównaniu z grupą kontrolną (DW) największe opóźnienie w procesie starzenia, i dwukrotne wydłużenie żywotności kwiatów po ich ścięciu, wykazał róże traktowane 150 mg l-1 SA. Fizjologiczne cechy, takie jak stę­żenie białek, poziom utlenienia lipidów (MDA) i aktywność enzymów - lipoksygena- zy (LOX), dysmutazy ponadtlenkowej (SOD) i peroksydazy (POD) byfy oznaczone jedynie w grupie kontrolnej (DW) oraz u roślin trzymanych w 150 mg l-1 roztworze kwasu salicylowego (SA) przez ponad 8 dni po zbiorze. Rozpad białek i gromadzenie się MDA po ścięciu zostaty zahamowane po zastosowaniu 150 mg l-1 SA. Aktywność LOX i POD stopniowo zwiększyła się wraz z postępującym starzeniem się kwiatów, podczas gdy aktywność SOD się zmniejszyła. Kwiaty traktowane pulsacyjnie SA wykazafy niższą aktywność LOX i POD, natomiast wy ższą SOD. Wyniki wskazują, że SA przedłuża żywotność kwiatów po ich zbiorze wzmacniając działanie przeciwu- tleniaczy i redukując stres oksydacyjny w czasie starzenia się kwiatów róży.

Słowa kluczowe

EN

salicylic acid; oxidative stress; senescence; flower; lipid peroxidation; lipoxygenase; petal senescence; rose flower; Yellow Island cultivar

• Wydawca: -
• Czasopismo: Journal of Fruit and Ornamental Plant Research
• Rocznik: 2011
• Tom: 19
• Numer: 1
• Opis fizyczny: p.183-193,fig.,ref.

Twórcy

autor

Gerailoo S.

• Department of Horticultural Sciences, Faculty of Agriculture, Islamic Azad University, Karaj Branch, Iran

autor

Ghasemnezhad M.

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