title: Exogenous jasmonic acid can enhance tolerance of wheat seedlings to salt stress.
abstract: Jasmonic acid (JA) is regarded as endogenous regulator that plays an important role in regulating stress responses, plant growth and development. To investigate the physiological mechanisms of salt stress mitigated by exogenous JA, foliar application of 2mM JA was done to wheat seedlings for 3days and then they were subjected to 150mM NaCl. Our results showed that 150mM NaCl treatment significantly decreased plant height, root length, shoot dry weight, root dry weight, the concentration of glutathione (GSH), chlorophyll b (Chl b) and carotenoid (Car), the activities of superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), ascorbate peroxidase (APX), enhanced the concentration of malondialdehyde (MDA), hydrogen peroxide (H2O2) and the rate of superoxide radical (O2•-) generation in the wheat seedlings when compared with the control. However, treatments with exogenous JA for 3 days significantly enhanced salt stress tolerance in wheat seedlings by decreasing the concentration of MDA and H2O2, the production rate of O2•- and increasing the transcript levels and activities of SOD, POD, CAT and APX and the contents of GSH, Chl b and Car, which, in turn, enhanced the growth of salt stressed seedlings. These results suggested that JA could effectively protect wheat seedlings from salt stress damage by enhancing activities of antioxidant enzymes and the concentration of antioxidative compounds to quench the excessive reactive oxygen species caused by salt stress and presented a practical implication for wheat cultivation in salt-affected soils.
authors.affiliation: College of Life Science, Henan Normal University, 46 Jianshe Road, Xinxiang 453007, PR China. Electronic address: qiuzongbo@126.com.
authors.forename: ZongBo
authors.initials: Z
authors.lastname: Qiu
authors.affiliation: College of Life Science, Henan Normal University, 46 Jianshe Road, Xinxiang 453007, PR China.
authors.forename: JunLi
authors.initials: J
authors.lastname: Guo
authors.affiliation: College of Life Science, Henan Normal University, 46 Jianshe Road, Xinxiang 453007, PR China.
authors.forename: AiJing
authors.initials: A
authors.lastname: Zhu
authors.affiliation: College of Life Science, Henan Normal University, 46 Jianshe Road, Xinxiang 453007, PR China.
authors.forename: Liang
authors.initials: L
authors.lastname: Zhang
authors.affiliation: College of Life Science, Henan Normal University, 46 Jianshe Road, Xinxiang 453007, PR China.
authors.forename: ManMan
authors.initials: M
authors.lastname: Zhang
mesh_terms: D003517:Cyclopentanes / Q000494:pharmacology*; D004789:Enzyme Activation / Q000187:drug effects; D004798:Enzymes / Q000235:genetics / Q000378:metabolism; D005786:Gene Expression Regulation / Q000187:drug effects; D006128:Growth / Q000187:drug effects; D006861:Hydrogen Peroxide / Q000378:metabolism; D015227:Lipid Peroxidation / Q000187:drug effects; D008315:Malondialdehyde / Q000378:metabolism; D010100:Oxygen / Q000378:metabolism; D054883:Oxylipins / Q000494:pharmacology*; D010860:Pigments, Biological / Q000378:metabolism; D010937:Plant Growth Regulators / Q000494:pharmacology; D055049:Salt Tolerance / Q000187:drug effects; D036226:Seedlings / Q000187:drug effects*; D012965:Sodium Chloride / Q000633:toxicity; D013312:Stress, Physiological / Q000187:drug effects*; D014908:Triticum / Q000187:drug effects*
chemical_list: D003517:Cyclopentanes; D004798:Enzymes; D054883:Oxylipins; D010860:Pigments, Biological; D010937:Plant Growth Regulators; D012965:Sodium Chloride; D008315:Malondialdehyde; C011006:jasmonic acid; D006861:Hydrogen Peroxide; D010100:Oxygen
keywords: Jasmonic acid; Lipid peroxidation; Salt stress; Wheat (Triticum aestivum L.)