پديد آورندگان :
Ali، Padash Department of Agronomy - College of Agriculture - University of Zabol , Ahmad، Ghanbari Department of Agronomy - College of Agriculture - University of Zabol , Mohammad Reza، Asgharipour Department of Agronomy - College of Agriculture - University of Zabol , Mohammad Ali، Javaheri Seed and Plant Improvement Research Department - Kerman Agricultural and Natural Resources Research and Education Center - Agricultural Research Education and Extension Organization (AREEO), Kerman
كليدواژه :
Abiotic stress , Flavonoids , Heavy metals , Pot experiment , Stress mitigator
چكيده لاتين :
Salicylic acid (SA) is a key molecule that alleviates abiotic stress in many plant species. In this study, the role of
SA was examined to moderate lead (Pb) toxicity in the basil (Ocimum basilicum). The experimental design was a
randomized complete block design with 4 levels of PbNO3; 0 (control), 100, 200 and 300 mg kg-1 of soil as the
first factor, and the foliar application of SA at 3 levels of 0, 50 and 100 mL L-1 comprised second factor that
were applied with four repetitions. The experiment was conducted during 2013 at research greenhouse of the
Zabol University. Addition of Pb at a rate of 300 mg.kg-1 significantly reduced the carotenoids by 45.5 percent
and organic acids by 49.3 percent, while it caused an increase in anthocyanins, flavonoids, electrolyte leakage
and antioxidant enzymes, including lipoxygenase and glutathione peroxidase. In addition, SA spraying had a
significant influence on all traits. In this study, the interaction effects between SA and Pb were significant on
carotenoids, anthocyanins, flavonoids, electrolyte leakage, organic acid, and lipoxygenase and glutathione
peroxidase, and plaid a moderating role and reduced the harmful effects of Pbtoxicity. The results of this
experiment suggested that the application of SA in basil caused a reduction in oxidative damage originated by Pb
toxicity and induce the synthesis of photosynthetic pigments, such as carotenoids.
