title: Iron-induced oxidative stress in a macrophyte: a chemometric approach.
abstract: Iron-induced oxidative stress in plants of Bacopa monnieri L., a macrophyte with medicinal value, was investigated using the chemometric approach. Cluster analysis (CA) rendered two distinct clusters of roots and shoots. Discriminant analysis (DA) identified discriminating variables (NP-SH and APX) between the root and shoot tissues. Principal component analysis (PCA) results suggested that protein, superoxide dismutase (SOD), ascorbic acid, proline, and Fe uptake are dominant in root tissues, whereas malondialdehyde (MDA), guaiacol peroxidase (POD), cysteine, and non-protein thiol (NP-SH) in shoot of the stress plant. Discriminant partial-least squares (DPLS) results further confirmed that SOD and ascorbic acid contents dominated in root tissues, while NP-SH, cysteine, POD, ascorbate peroxidase (APX), and MDA in shoot. MDA and NP-SH were identified as most pronounced variables in plant during the highest exposure time. The chemometric approach allowed for the interpretation of the induced biochemical changes in plant tissues exposed to iron.
authors.affiliation: Ecotoxicology and Bioremediation Group, National Botanical Research Institute, Rana Pratap Marg, Lucknow 226 001, India. sinha_sarita52@yahoo.com
authors.forename: Sarita
authors.initials: S
authors.lastname: Sinha
authors.forename: Ankita
authors.initials: A
authors.lastname: Basant
authors.forename: Amrita
authors.initials: A
authors.lastname: Malik
authors.forename: Kunwar P
authors.initials: KP
authors.lastname: Singh
mesh_terms: D060387:Ascorbate Peroxidases; D034681:Bacopa / Q000737:chemistry / Q000187:drug effects* / Q000378:metabolism; D016000:Cluster Analysis; D003545:Cysteine / Q000032:analysis / Q000378:metabolism; D016002:Discriminant Analysis; D007501:Iron / Q000633:toxicity*; D016018:Least-Squares Analysis; D018384:Oxidative Stress / Q000187:drug effects* / Q000502:physiology; D009195:Peroxidase / Q000032:analysis / Q000378:metabolism; D010544:Peroxidases / Q000032:analysis / Q000378:metabolism; D018517:Plant Roots / Q000737:chemistry / Q000187:drug effects* / Q000378:metabolism; D018520:Plant Shoots / Q000737:chemistry / Q000187:drug effects* / Q000378:metabolism; D010946:Plants, Medicinal; D025341:Principal Component Analysis; D013438:Sulfhydryl Compounds / Q000032:analysis / Q000378:metabolism; D013482:Superoxide Dismutase / Q000032:analysis / Q000378:metabolism; D013997:Time Factors
chemical_list: D013438:Sulfhydryl Compounds; D007501:Iron; D010544:Peroxidases; C121048:guaiacol peroxidase; D060387:Ascorbate Peroxidases; D009195:Peroxidase; D013482:Superoxide Dismutase; D003545:Cysteine