title: Moderation of morphogenetic and oxidative stress responses in flax in vitro cultures by hydroxynonenal and desferrioxamine.
abstract: Hypocotyl segments of 7-day old seedlings of flax (Linum usitatissimum L.) cultivars Atalante, Flanders, Jitka, Szegedi 30 and Super were screened for organogenesis (shoot and root induction) and embryo-like structure production. A non-destructive assay for hydroxyl radicals (*OH), utilising DMSO as a radical trap, was used to determine *OH formation during tissue culture and morphogenesis. Desferrioxamine, an inhibitor of Fenton reaction, and 4-hydroxy-2-nonenal, a cytotoxic Lipid peroxidation product, were exogenously applied to flax cultures to determine the effect of antioxidative and prooxidative status on morphogenetic responses induced through the exogenous application of plant growth regulators. Flax genotypes varied in their response to treatments after exposure to different plant hormones. Hydroxyl radical (*OH) formation correlated with morphogenetic responses and this was affected by plant hormones. Desferrioxamine and 4-hydroxy-2-nonenal also moderated morphogenetic responses and influenced hydroxyl radical formation during in vitro propagation.
authors.affiliation: Conservation and Environmental Science Centre, University of Abertay Dundee, DD1 1HG Dundee, Scotland, UK. bobert@scri.sari.ac.uk
authors.forename: Bohus
authors.initials: B
authors.lastname: Obert
authors.forename: Erica E
authors.initials: EE
authors.lastname: Benson
authors.forename: Steve
authors.initials: S
authors.lastname: Millam
authors.forename: Anna
authors.initials: A
authors.lastname: Pret'ová
authors.forename: David H
authors.initials: DH
authors.lastname: Bremner
mesh_terms: D000447:Aldehydes / Q000494:pharmacology*; D002478:Cells, Cultured; D003676:Deferoxamine / Q000494:pharmacology*; D004305:Dose-Response Relationship, Drug; D019597:Flax / Q000187:drug effects* / Q000235:genetics / Q000254:growth & development / Q000502:physiology*; D017665:Hydroxyl Radical / Q000378:metabolism; D018546:Hypocotyl / Q000166:cytology; D018384:Oxidative Stress; D013997:Time Factors
chemical_list: D000447:Aldehydes; D017665:Hydroxyl Radical; D003676:Deferoxamine; C027576:4-hydroxy-2-nonenal