Pak. J. Bot., 48(5): 1915-1923, 2016.

MODULATION OF ADVERSE IMPACT OF CHILLING IN VICIA FABA L.

BY METHYL JASMONATE INVOLVES CHANGES IN ANTIOXIDANT

METABOLISM AND METABOLITES

ELSAYED FATHI ABD_ALLAH^1,2*, ABDULAZIZ A. ALQARAWI¹, SARAH A. AL-RASHED³,

ABEER HASHEM^3,4 ASMA A. AL-HUQAIL³ AND NORAH SALIM ALDOSARI³

²Plant Production Department, College, of Food & Agricultural Sciences, King Saud University,

P.O. Box. 2460 Riyadh 11451, Saudi Arabia

²Seed Pathology Department, Plant Pathology Research Institute, Agriculture Research Center, Giza 12511, Egypt

³Botany and Microbiology Department, College, of Science, King Saud University,

P.O. Box. 2460 Riyadh 11451, Saudi Arabia

⁴Mycology and Plant Disease Survey Department, Plant Pathology Research Institute,

Agriculture Research Center, Giza 12511, Egypt

^*Corresponding author’s email: eabdallah@ksu.edu.sa

Abstract

We conducted experiments to assess the effect of chilling (10^oC) 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.

Key words: Antioxidants, Nitrogenase, Lipid peroxidation, Phenols, Methyl jasmonate and Chilling.

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			Updated: 01-01-06
	*MODULATION OF ADVERSE IMPACT OF CHILLING IN VICIA FABA* L. BY METHYL JASMONATE INVOLVES CHANGES IN ANTIOXIDANT METABOLISM AND METABOLITES ELSAYED FATHI ABD_ALLAH^1,2, ABDULAZIZ A. ALQARAWI¹, SARAH A. AL-RASHED³,* ABEER HASHEM^3,4 ASMA A. AL-HUQAIL³ AND NORAH SALIM ALDOSARI³ ²Plant Production Department, College, of Food & Agricultural Sciences, King Saud University, P.O. Box. 2460 Riyadh 11451, Saudi Arabia ²Seed Pathology Department, Plant Pathology Research Institute, Agriculture Research Center, Giza 12511, Egypt ³Botany and Microbiology Department, College, of Science, King Saud University, P.O. Box. 2460 Riyadh 11451, Saudi Arabia ⁴Mycology and Plant Disease Survey Department, Plant Pathology Research Institute, Agriculture Research Center, Giza 12511, Egypt ^Corresponding author’s email: eabdallah@ksu.edu.sa* Abstract We conducted experiments to assess the effect of chilling (10^oC) 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. Key words: Antioxidants, Nitrogenase, Lipid peroxidation, Phenols, Methyl jasmonate and Chilling.

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