PJB-2016-228
MODULATION OF ADVERSE IMPACT OF CHILLING IN VICIA FABA L. BY METHYL JASMONATE INVOLVES CHANGES IN ANTIOXIDANT METABOLISM AND METABOLITES
ELSAYED FATHI ABD_ALLAH1,2*, ABDULAZIZ A. ALQARAWI1, SARAH A. AL-RASHED3, ABEER HASHEM3,4 ASMA A. AL-HUQAIL 3 AND NORAH SALIM ALDOSARI
Abstract
We conducted experiments to assess the effect of chilling (10oC) stress on growth, nitrogen and antioxidant components of faba bean (Vicia faba L.) and the role of methyl jasmonate (MJ 25 µM) in growth regulation and amelioration of chilling stress. Chilling temperature significantly reduced growth and pigment synthesis which was however significantly improved by application of MJ. Nodule growth, nitrogenase activity and nitrogen content were negatively affected by chilling and MJ application caused significant improvement in these attributes. Application of MJ significantly enhanced activity of antioxidant enzymes resulting in reduced oxidative damage. Chilling stressed plants exhibited higher lipid peroxidation and production of hydrogen peroxide. Ascorbic acid and phenol contents were observed to increase by 8.4% and 7.9% due to MJ providing strength to plants against chilling stress. In addition application of MJ was observed to maintain optimal levels of abscissic acid (ABA) and salicylic acid (SA) resulting in coordinated regulation of defence mechanisms against chilling stress.
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