National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Greenhouse and field experiments were conducted to study the changes of antioxidant enzyme activities of arbuscular mycorrhizal (AM) fungus Glomus intraradices Schenck and Smith inoculated (M+) and non-inoculated (M−) maize (Zea mays L.) plants (variety COHM5) under varying levels of zinc (12.5 and 25 kg ha−1) iron (12.5 and 25 kg ha−1). Roots and shoots sampled at 45 and 75 days after sowing (DAS) were estimated for its antioxidant enzymes superoxide dismutase, peroxidase, IAA oxidase, polyphenol oxidase, acid phosphatase and nutritional status especially Fe and Zn concentrations. Mycorrhizal inoculation significantly (P ≤ 0.01) increased all the antioxidant enzymes in both roots and shoots at 45 and 75 DAS regardless of Fe and Zn levels. All enzyme activities except SOD increased progressively with increasing levels of Fe and Zn under M+ and M− conditions. Acid phosphatase activity in M+ roots and shoots were higher in all levels of Zn and Fe but the values decreased with increasing levels of Zn particularly in roots. Mycorrhizal fungus inoculated plants had higher Fe and Zn concentrations in both stages in comparison to non-inoculated plants. Overall, data suggest that mycorrhizal symbiosis plays a vital role in enhancing activities of antioxidant enzymes and nutritional status that enables the host plant to sustain zinc and iron deficient conditions.
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