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Invited Article | Open Access

Arbuscular mycorrhiza fungi increased the susceptibility of Astragalus adsurgens to powdery mildew caused by Erysiphe pisi

Yuanzheng Liu, Xi Feng,*, Ping Gao, Yanzhong Li, Michael J. Christensen, Tingyu Duan( )
State Key Laboratory of Grassland Agro-Ecosystems, Lanzhou University, Lanzhou, China; National Demonstration Center for Experimental Grassland Science Education, Lanzhou University, Lanzhou, China; College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China

*These authors contributed equally to this work and should be considered co-first authors.

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Abstract

Powdery mildew caused by Erysiphe pisi is a major factor that affects the growth of standing milkvetch (Astragalus adsurgens). As arbuscular mycorrhizal fungi (AMF) have shown to be enhancing the resistance of plants to biotrophic pathogens such as powdery mildew, a study was carried out to look at the effects of three AMF, either singularly or in combination, on the growth of standing milkvetch and susceptibility to E. pisi. The results showed that the presence of AMF enhanced the growth of standing milkvetch even though their presence in the roots increased susceptibility to this foliage pathogen compared with plants having no AMF. This increase in growth of plants with severe infection of powdery mildew was especially surprising as leaves contained lower levels of chlorophyll than plants without AMF and had a greater concentration of malondialdehyde, an indicator of the damage of cell membrane. The effects on the extent of growth and powdery mildew enhancement differed inconsistently with the type of AMF in roots. The effects on growth and powdery mildew were not related to intensity of AMF colonisation. The peroxidase (POD) was consistently higher activity (15% to 72%) in plants with AMF than plants without them.

Keywords

Powdery mildewArbuscular mycorrhizal fungibiocontrolStanding milkvetch

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Mycology
Volume 9 Issue 3,
September 2018
Pages 223-232
DOI: 10.1080/21501203.2018.1477849
Cite this article:
Liu Y, Feng X, Gao P, et al. Arbuscular mycorrhiza fungi increased the susceptibility of Astragalus adsurgens to powdery mildew caused by Erysiphe pisi. Mycology, 2018, 9(3): 223-232. https://doi.org/10.1080/21501203.2018.1477849

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Received: 05 November 2017
Accepted: 12 May 2018
Published: 28 May 2018
© 2018 The Author(s).

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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