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|Title: ||The Protective Biochemical Properties of Arbuscular Mycorrhiza Extraradical Mycelium in Acidic Soils Are Maintained throughout the Mediterranean Summer Conditions|
|Authors: ||Faria, J. M. S.|
Teixeira, D. M.
Pinto, A. P.
|Keywords: ||acidic soil|
arbuscular mycorrhizal fungi
manganese superoxide dismutase
|Issue Date: ||Apr-2021|
|Citation: ||Faria, J.M.S.; Teixeira, D.M.;
Pinto, A.P.; Brito, I.; Barrulas, P.;
Carvalho, M. The Protective
Biochemical Properties of Arbuscular
Mycorrhiza Extraradical Mycelium in
Acidic Soils Are Maintained
throughout the Mediterranean
Summer Conditions. Agronomy 2021,
11, 748. https://doi.org/
|Abstract: ||In acidic soils with manganese (Mn) toxicity, arbuscular mycorrhizal fungi (AMF) can
improve plant host growth by enhancing nutrition and protecting against environmental stress.
The intact extraradical mycelium (ERM) of AMF is able to survive Mediterranean summer conditions
and provide an earlier colonization of winter crops. This study evaluated if summer season
conditions hindered the beneficial effects of wheat colonization by the intact ERM associated with
a native plant, in acidic soil. Wheat was grown in soil with intact or disrupted ERM associated
with Ornithopus compressus (ORN), developed for 7 or 24 weeks, to simulate ERM summer survival.
The activity of antioxidant enzymes was determined, and the quantitative analysis of Mn and
macronutrients was performed by inductively coupled plasma mass spectrometry (ICP-MS), in wheat
shoots and respective subcellular fractions. Wheat colonization by intact ERM decreased shoot Mn
concentration but increased the proportion of Mn in the apoplast. Overall, antioxidant enzymatic activity
decreased but the proportion of Mn-superoxide dismutase activity over the remaining isoforms
increased, suggesting its important role in the AMF-mediated mitigation of Mn toxicity. Summer
conditions did not substantially reduce the benefits provided by ORN ERM. A no-till strategy allied
to the development of native microbiota can contribute to the sustainable optimization of acidic
|Appears in Collections:||QUI - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica|
MED - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica
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