Superoxide Dismutase Activation in Response to Lime-Induced Chlorosis

Alterations in superoxide dismutase (SOD) activity were studied on chlorotic grapevines (Vitis vinifera L.) grown under natural conditions on soil containing 30-35% CaCO3and in lupins (Lupinus luteus L.) grown in a greenhouse with addition of 20% CaCO3to the soil. In both series of experiments SOD a...

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Bibliographic Details
Published in:The New phytologist 1990-01, Vol.114 (1), p.39-45
Main Authors: Ostrovskaya, L. K., Truch, V. V., Mikhailik, O. M.
Format: Article
Language:English
Subjects:
Agronomy. Soil science and plant productions
Biological and medical sciences
Carotenoids
Chlorophylls
Chloroplasts
Deficiencies. Phytotoxicity of elements. Salinity
Fundamental and applied biological sciences. Psychology
Gels
General agronomy. Plant production
grapevine cultivars
Hypochromic anemia
Iron chlorosis
Leaves
Oxygen
Plant biochemistry
Plants
SOD activity
Soil-plant relationships. Soil fertility. Fertilization. Amendments
superoxide
Superoxides
yellow lupin
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Summary:Alterations in superoxide dismutase (SOD) activity were studied on chlorotic grapevines (Vitis vinifera L.) grown under natural conditions on soil containing 30-35% CaCO3and in lupins (Lupinus luteus L.) grown in a greenhouse with addition of 20% CaCO3to the soil. In both series of experiments SOD activity in leaves of chlorotic plants was from 20 to 30% higher. The efficiency and absolute rate of superoxide anion radical formation were found to rise as a result of iron deficiency in the lupin leaves. Increased SOD activity and greater amounts of enzyme isoforms were observed in the leaves of grapevine cultivars resistant to lime-induced chlorosis as compared to less resistant cultivars. The present investigation suggests that initiation of lime-induced chlorosis is determined not only by reduced chlorophyll biosynthesis but also by other consequencies of iron deficiency in tissues, particularly by the high rate of formation of superoxide and other activated oxygen species, causing destructive changes in the photosynthetic apparatus. The increased SOD activity may be regarded as a protective mechanism against the formation of superoxide.
ISSN:0028-646X
1469-8137
DOI:10.1111/j.1469-8137.1990.tb00371.x