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Open AccessArticle

Effects of Mycorrhizae on Physiological Responses and Relevant Gene Expression of Peach Affected by Replant Disease

1
College of Horticulture and Gardening, Yangtze University, Jingzhou 434025, China
2
ICAR-Central Citrus Research Institute, Nagpur 440033, India
3
Department of Chemistry, Faculty of Science, University of Hradec Kralove, 50003 Hradec Kralove, Czech Republic
*
Author to whom correspondence should be addressed.
Agronomy 2020, 10(2), 186; https://doi.org/10.3390/agronomy10020186
Received: 31 December 2019 / Revised: 9 January 2020 / Accepted: 22 January 2020 / Published: 28 January 2020
(This article belongs to the Special Issue Contribution of Arbuscular Mycorrhizal Symbiosis to Crop Growth)
A potted experiment was carried out to evaluate the effect of an arbuscular mycorrhizal fungus (AMF), Acaulospora scrobiculata, on peach seedlings grown in non-replant (NR) and replant (R) soils, to establish whether AMF inoculation alleviated soil replant disease through changes in physiological levels and relevant gene expression. After 15 weeks of mycorrhization, root mycorrhizal colonization was heavily inhibited by R treatment versus NR treatment. AMF plants under NR and R soil conditions displayed significantly higher total plant biomass than non-AMF plants. AMF inoculation significantly increased root sucrose and fructose concentrations and root catalase, peroxidase, polyphenol oxidase, and phenylalanine ammonialyase activities under R conditions. Likewise, salicylic acid, jasmonic acid, chitinase, total soluble phenol, and lignin concentrations in roots were significantly higher in AMF than in non-AMF seedlings grown in R soil. Over-expression of PpCHI, PpLOX1, PpLOX5, PpAOC3, PpAOC4, and PpOPR2 in roots was observed in AMF-inoculated seedlings, as compared to that of non-AMF-inoculated seedlings grown in R soils. Thus, mycorrhizal fungal inoculation conferred a greater tolerance to peach plants in R soil by stimulating antioxidant enzyme activities, disease-resistance substance levels, and the expression of relevant genes. View Full-Text
Keywords: antioxidant enzyme; arbuscular mycorrhizal fungi; jasmonic acid; peach; soil replant antioxidant enzyme; arbuscular mycorrhizal fungi; jasmonic acid; peach; soil replant
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Gao, W.-Q.; Lü, L.-H.; Srivastava, A.K.; Wu, Q.-S.; Kuča, K. Effects of Mycorrhizae on Physiological Responses and Relevant Gene Expression of Peach Affected by Replant Disease. Agronomy 2020, 10, 186.

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