Adaptive biochemical and physiological responses of Eriobotrya japonica to fluoride air pollution

The biochemical and physiological effects of fluoride were investigated in loquat trees ( Eriobotrya japonica ) grown in the vicinity of a phosphate fertilizer plant in Tunisia. Photosynthetic rate (Pn), stomatal conductance (Gs), transpiration rate (E), superoxide dismutase (SOD), catalase (CAT) an...

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Bibliographic Details
Published in:Ecotoxicology (London) 2017-09, Vol.26 (7), p.991-1001
Main Authors: Elloumi, Nada, Zouari, Mohamed, Mezghani, Imed, Ben Abdallah, Ferjani, Woodward, Steve, Kallel, Monem
Format: Article
Language:English
Subjects:
Agricultural chemicals
Agrochemicals
Air pollution
Analysis
Catalase
Conductance
Earth and Environmental Science
Ecology
Ecotoxicology
Environment
Environmental Management
Eriobotrya japonica
Fertilizer industry
Fertilizers
Fluorides
Foliage
Glutathione
Glutathione peroxidase
Hydrogen peroxide
Leakage
Leaves
Lipid peroxidation
Oxidative stress
Peroxidase
Phenolic compounds
Phosphate industry
Phosphates
Photosynthesis
Photosynthetic pigments
Physiological aspects
Physiological effects
Physiological responses
Physiology
Pigments
Pollution effects
Proline
Resistance
Roots
Side effects
Stomata
Superoxide
Superoxide dismutase
Transpiration
Trees
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Summary:The biochemical and physiological effects of fluoride were investigated in loquat trees ( Eriobotrya japonica ) grown in the vicinity of a phosphate fertilizer plant in Tunisia. Photosynthetic rate (Pn), stomatal conductance (Gs), transpiration rate (E), superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPx) activities were assessed; along with photosynthetic pigments, lipid peroxidation, electrolytic leakage (EL) and total phenolic contents in foliage and roots of trees at different distances from the phosphate fertilizer plant. All assessed parameters showed significant discrepancies in comparison with unpolluted sites. Obtained results showed high oxidative stress indices including H 2 O 2 , lipid peroxidation, and EL, SOD, CAT and GPx activities and proline contents in leaves and roots at the polluted sites as compared to control. In contrast, leaf Pn, Gs, E and photosynthetic pigment contents were low as compared to the control. These results indicate that even though antioxidant responses increased near the factory, adverse effects on physiology were pronounced.
ISSN:0963-9292
1573-3017
DOI:10.1007/s10646-017-1827-y