Arbuscular mycorrhizae modify winter wheat root morphology and alleviate phosphorus deficit stress

Boris Lazarević, Tomáš Lošák and Ahmad M. Manschadi
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Boris Lazarević: Department of Plant Nutrition, Faculty of Agriculture, University of Zagreb, Zagreb, Croatia
Tomáš Lošák: Faculty of the Regional Development and International Studies, Mendel University in Brno, Brno, Czech Republic
Ahmad M. Manschadi: Department of Crop Sciences, Division of Agronomy, University of Natural Resources and Life Sciences, Vienna, Tulln, Austria

Plant, Soil and Environment, 2018, vol. 64, issue 1, 47-52

Abstract: Arbuscular mycorrhizal (AM) root colonization is known to have beneficial effects on plant growth especially under phosphorus (P) deficit conditions. The objectives of present study were: (i) to quantify changes in early wheat root development of AM-inoculated (AMI) and AM-free (AMF) roots under limited P availability; (ii) to assess possible mitigating effect of AM inoculation on photochemical efficiency under P deficit stress. AMI (inoculated with Rhizophagus irregularis) and AMF wheat plants were grown for 20 days in low (1 μmol/L) and high (50 μmol/L)P treatments. AM inoculation affected root morphology and shoot P concentration in low P treatment. AM inoculation alleviated reduction of the total root length in low P treatment, mainly due to an increase of fine roots length(< 0.5 mm). Contrastingly, shoot dry weight was reduced by AM inoculation in low P treatment. P deficiency decreased photochemical efficiency of wheat plants. However, due to increased sink capacity and facilitated nutrient concentrations AM inoculation alleviates phosphorus deficit stress and increased photochemical efficiency.

Keywords: plant macronutrient; root system; mutualism; chlorophyll fluorescence; shoot dry weight (search for similar items in EconPapers)
Date: 2018
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlpse:v:64:y:2018:i:1:id:678-2017-pse

DOI: 10.17221/678/2017-PSE

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