title: Exogenous methyl jasmonate regulates cytokinin content by modulating cytokinin oxidase activity in wheat seedlings under salinity.
abstract: The treatment of 4-days-old wheat seedlings with methyl jasmonate (MeJA) in concentration optimal for their growth (0.1 μM) resulted in a rapid transient almost two-fold increase in the level of cytokinins (CKs). MeJA-induced accumulation of CKs was due to inhibition of both cytokinin oxidase (CKX) (cytokinin oxidase/dehydrogenase, EC 1.5.99.12) gene expression and activity of this enzyme. Pretreatment of wheat seedlings with MeJA decreased the growth-retarding effect of sodium chloride salinity and accelerated growth recovery after withdrawal of NaCl from the incubation medium. We speculate that this protective effect of the hormone might be due to MeJA's ability to prevent the salinity-induced decline in CK concentration that was caused by inhibition of gene expression and activity of CKX in wheat seedlings. The data might indicate an important role for endogenous cytokinins in the implementation of growth-promoting and protective effects of exogenous MeJA application on wheat plants.
authors.affiliation: Institute of Biochemistry and Genetics, Ufa Research Centre, Russian Academy of Sciences, pr. Octyabrya, 71, Ufa 450054, Russia.
authors.forename: Azamat
authors.initials: A
authors.lastname: Avalbaev
authors.affiliation: Institute of Biochemistry and Genetics, Ufa Research Centre, Russian Academy of Sciences, pr. Octyabrya, 71, Ufa 450054, Russia.
authors.forename: Ruslan
authors.initials: R
authors.lastname: Yuldashev
authors.affiliation: Institute of Biochemistry and Genetics, Ufa Research Centre, Russian Academy of Sciences, pr. Octyabrya, 71, Ufa 450054, Russia.
authors.forename: Kristina
authors.initials: K
authors.lastname: Fedorova
authors.affiliation: Institute of Biochemistry and Genetics, Ufa Research Centre, Russian Academy of Sciences, pr. Octyabrya, 71, Ufa 450054, Russia.
authors.forename: Kirill
authors.initials: K
authors.lastname: Somov
authors.affiliation: Ufa Institute of Biology, Russian Academy of Sciences, pr. Octyabrya, 69, Ufa 450054, Russia.
authors.forename: Lidiya
authors.initials: L
authors.lastname: Vysotskaya
authors.affiliation: Institute of Biochemistry and Genetics, Ufa Research Centre, Russian Academy of Sciences, pr. Octyabrya, 71, Ufa 450054, Russia.
authors.forename: Chulpan
authors.initials: C
authors.lastname: Allagulova
authors.affiliation: Institute of Biochemistry and Genetics, Ufa Research Centre, Russian Academy of Sciences, pr. Octyabrya, 71, Ufa 450054, Russia. Electronic address: shakirova@anrb.ru.
authors.forename: Farida
authors.initials: F
authors.lastname: Shakirova
mesh_terms: D000085:Acetates / Q000494:pharmacology*; D018533:Biomass; D003517:Cyclopentanes / Q000494:pharmacology*; D003583:Cytokinins / Q000378:metabolism*; D004573:Electrolytes / Q000378:metabolism; D018506:Gene Expression Regulation, Plant / Q000187:drug effects; D008940:Mitotic Index; D010088:Oxidoreductases / Q000235:genetics / Q000378:metabolism*; D054883:Oxylipins / Q000494:pharmacology*; D010937:Plant Growth Regulators / Q000378:metabolism; D054712:Salinity; D036226:Seedlings / Q000187:drug effects / Q000201:enzymology*; D014908:Triticum / Q000187:drug effects / Q000201:enzymology* / Q000235:genetics
chemical_list: D000085:Acetates; D003517:Cyclopentanes; D003583:Cytokinins; D004573:Electrolytes; D054883:Oxylipins; D010937:Plant Growth Regulators; C072239:methyl jasmonate; D010088:Oxidoreductases; C019984:cytokinin oxidase
keywords: Cytokinin; Cytokinin oxidase; Methyl jasmonate; Salinity; Triticum aestivum L.