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Open Access Green as soon as Postprint is submitted to ZB.
Polyamines as Radical Scavengers and Protectants against Ozone Damage.
Phytochemistry 28, 1589-1595 (1989)
Leaf injury of the ozone-sensitive tobacco cultivar Bel W 3 caused by ozone treatments was prevented to a large extent by root application of putrescine, spermidine or spermine. The titres of soluble free and conjugated putrescine and spermidine were concomitantly increased two- to three-fold after putrescine or spermidine application. The amounts of putrescine and spermidine associated with cell wall or membrane pellet fractions were elevated four to six times above levels of control plants. In order to establish whether the protective effect of polyamines against ozone damage may be caused by their proposed radical scavenging properties, the reactivities of polyamines and putrescine conjugates towards hydroxyl, tert-butoxyl, sulphite radicals and superoxide anions were determined. Free polyamines showed relatively low rate constants with all types of radicals. Only putrescine conjugates with the effective radical scavengers caffeic, ferulic and p-coumaric acid had consistently high rate constants. It is concluded that scavenging of radicals by free polyamines cannot explain the protection against ozone damage observed after exogenous application.
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Publication type
Article: Journal article
Document type
Scientific Article
Keywords
Nicotiana tabacum L.; Solanaceae; polyamines; hydroxyl radical; ozone; protection; pulse radiolysis; putrescine hydroxycinnamic acid amides; rate constants; sulphite radical; superoxide anion; tert-butoxyl radical.
ISSN (print) / ISBN
0031-9422
e-ISSN
1873-3700
Journal
Phytochemistry
Quellenangaben
Volume: 28,
Issue: 6,
Pages: 1589-1595
Publisher
Elsevier
Non-patent literature
Publications
Reviewing status
Peer reviewed
Institute(s)
Institute of Radiation Biology (ISB)