title: Methyl Jasmonate Alleviates Cadmium-Induced Photosynthetic Damages through Increased S-Assimilation and Glutathione Production in Mustard.
abstract: The effect of methyl jasmonate (MeJA) in mitigation of 50 μM cadmium (Cd) toxicity on structure and function of photosynthetic apparatus in presence or absence of 1.0 mM [Formula: see text] was investigated in mustard (Brassica junceaL. cv. Ro Agro 4001) at 30 days after sowing. Plants exhibited increased oxidative stress, impaired photosynthetic function when grown with Cd, but MeJA in presence of sulfur (S) more prominently ameliorated Cd effects through increased S-assimilation and production of reduced glutathione (GSH) and promoted photosynthetic functions. The transmission electron microscopy showed that MeJA protected chloroplast structure against Cd-toxicity. The use of GSH biosynthetic inhibitor, buthionine sulfoximine (BSO) substantiated the findings that ameliorating effect of MeJA was through GSH production. MeJA could not alleviate Cd effects when BSO was used due to unavailability of GSH even with the input of S. The study shows that MeJA regulates S-assimilation and GSH production for protection of structure and function of photosynthetic apparatus in mustard plants under Cd stress.
authors.affiliation: Plant Physiology and Biochemistry Laboratory, Department of Botany, Aligarh Muslim University Aligarh, India.
authors.forename: Tasir S
authors.initials: TS
authors.lastname: Per
authors.affiliation: Plant Physiology and Biochemistry Laboratory, Department of Botany, Aligarh Muslim University Aligarh, India.
authors.forename: Nafees A
authors.initials: NA
authors.lastname: Khan
authors.affiliation: Plant Physiology and Biochemistry Laboratory, Department of Botany, Aligarh Muslim University Aligarh, India.
authors.forename: Asim
authors.initials: A
authors.lastname: Masood
authors.affiliation: Plant Physiology and Biochemistry Laboratory, Department of Botany, Aligarh Muslim University Aligarh, India.
authors.forename: Mehar
authors.initials: M
authors.lastname: Fatma
keywords: cadmium toxicity; glutathione; methyl jasmonate; oxidative stress; photosynthesis