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Contribution of arbuscular mycorrhizal fungus to red kidney and wheat plants tolerance grown in heavy metal-polluted soil
Faculty
Science
Year:
2005
Type of Publication:
Article
Pages:
332-345
Authors:
Rabie, GH
Journal:
AFRICAN JOURNAL OF BIOTECHNOLOGY ACADEMIC JOURNALS
Volume:
4
Research Area:
Biotechnology \& Applied Microbiology
ISSN
ISI:000234260500006
Keywords :
antioxidant, chlorophyll, dry weight, mycorrhiza, phosphor, phytoremediation, pollution, symbiosis
Abstract:
The researcher had investigated the role of arbuscular mycorrhizal fungal inoculation in red kidney and wheat in heavy metals tolerance in soil artificially contaminated with high concentrations of zinc, copper, lead and cadmium. Metals accumulated by mycorrhizal wheat plants were mostly distributed in root tissues, suggesting that an exclusion strategy for metal tolerance widely exists in them. Mycorrhizal red kidney plants could accumulate relatively high metal concentrations in their shoots which indicated that internal detoxification metal tolerance mechanisms are also included. From a number of physiological indices measured in this study, mycorrhizal symbiosis significantly increased root and shoot dry weight, chlorophyll content and total lipid in wheat plants. It also significantly increased root and shoot dry weight, protein content and the activity of antioxidant enzymes in red kidney plants, when the two plant species are grown at heavy metals artificially contaminated soils. The beneficial effects of the Am fungus observed in this study aroused an interest in considering the role of arbuscular mycorrhizal fungi in plant-based strategies of remediation of highly heavy metal contaminated soils.
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