title: Cumulative effect of nitrogen and sulphur on Brassica juncea L. genotypes under NaCl stress.
abstract: In the present study, N and S assimilation, antioxidant enzymes activity, and yield were studied in N and S-treated plants of Brassica juncea (L.) Czern. & Coss. (cvs. Chuutki and Radha) under salt stress. The treatments were given as follows: (1) NaCl(90) mM+N(0)S(0) mg kg(-1) sand (control), (2) NaCl(90) mM+N(60)S(0) mg kg(-1) sand, (3) NaCl(90) mM+N(60)S(20) mg kg(-1) sand, (4) NaCl(90) mM+N(60)S(40) mg kg(-1) sand, and (5) NaCl(90) mM+N(60)S(60) mg kg(-1) sand. The combined application of N (60 mg kg(-1) sand) and S (40 mg kg(-1) sand) proved beneficial in alleviating the adverse effect of salt stress on growth attributes (shoot length plant(-1), fresh weight plant(-1), dry weight plant(-1), and area leaf(-1)), physio-biochemical parameters (carbonic anhydrase activity, total chlorophyll, adenosine triphosphate-sulphurylase activity, leaf N, K and Na content, K/Na ratio, activity of nitrate reductase, nitrite reductase, glutamine synthetase, glutamate synthase, catalase, superoxide dismutase, ascorbate peroxidase and glutathione reductase, and content of glutathione and ascorbate), and yield attributes (pods plant(-1), seeds pod(-1), and seed yield plant(-1)). Therefore, it is concluded that combined application of N and S induced the physiological and biochemical mechanisms of Brassica. The stimulation of antioxidant enzymes activity and its synergy with N and S assimilation may be one of the important mechanisms that help the plants to tolerate the salinity stress and resulted in an improved yield.
authors.affiliation: Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia. manzerhs@yahoo.co.in
authors.forename: Manzer H
authors.initials: MH
authors.lastname: Siddiqui
authors.forename: Firoz
authors.initials: F
authors.lastname: Mohammad
authors.forename: M Masrooor A
authors.initials: MM
authors.lastname: Khan
authors.forename: Mohamed H
authors.initials: MH
authors.lastname: Al-Whaibi
mesh_terms: D000975:Antioxidants / Q000378:metabolism; D002256:Carbonic Anhydrases / Q000378:metabolism; D002734:Chlorophyll / Q000378:metabolism; D004789:Enzyme Activation; D005838:Genotype; D005978:Glutathione / Q000378:metabolism; D009149:Mustard Plant / Q000187:drug effects* / Q000201:enzymology / Q000254:growth & development / Q000502:physiology; D009572:Nitrite Reductases / Q000378:metabolism; D009584:Nitrogen / Q000494:pharmacology*; D018515:Plant Leaves / Q000187:drug effects / Q000201:enzymology / Q000254:growth & development / Q000502:physiology; D011188:Potassium / Q000378:metabolism; D055051:Salt-Tolerant Plants / Q000187:drug effects / Q000201:enzymology / Q000254:growth & development / Q000502:physiology; D012639:Seeds / Q000378:metabolism / Q000502:physiology; D012965:Sodium Chloride / Q000494:pharmacology*; D013312:Stress, Physiological; D013455:Sulfur / Q000494:pharmacology*; D013482:Superoxide Dismutase / Q000378:metabolism
chemical_list: D000975:Antioxidants; D002734:Chlorophyll; D012965:Sodium Chloride; D013455:Sulfur; D013482:Superoxide Dismutase; D009572:Nitrite Reductases; D002256:Carbonic Anhydrases; D005978:Glutathione; D009584:Nitrogen; D011188:Potassium