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Open AccessArticle

Co-Amended Synergistic Interactions between Arbuscular Mycorrhizal Fungi and the Organic Substrate-Induced Cucumber Yield and Fruit Quality Associated with the Regulation of the AM-Fungal Community Structure under Anthropogenic Cultivated Soil

1
College of Horticulture, Northwest A&F University, Yangling 712100, China
2
Department of Soil Science & SWC, PMAS-Arid Agriculture University, Rawalpindi-46300, Pakistan
*
Author to whom correspondence should be addressed.
Int. J. Mol. Sci. 2019, 20(7), 1539; https://doi.org/10.3390/ijms20071539
Received: 31 January 2019 / Revised: 17 March 2019 / Accepted: 21 March 2019 / Published: 27 March 2019
(This article belongs to the Special Issue Plant Microbe Interaction 2019)
Monotonous cucumber double-cropping systems under plastic greenhouse vegetable cultivation (PGVC) previously intensified by long-term anthropogenic activities and manipulative treatments leads to a crop productivity reduction and soil biota disturbances. In this study, the role of the indigenous arbuscular mycorrhizal strain (AM: Glomus versiforme L.) and organic substrate (GS: Garlic stalk) application were assessed for plant microbe interaction and crop productivity feedback in a greenhouse (2016–2018) under a cultivated Anthrosol characterized as a replanted degraded soil. We found that repetitively adding AM inocula with organic substrates (GS) improved the cucumber growth and physiology. The useful trait of AM symbiosis with C-amended organic substrates preferentially manifested as increased root colonization, hyphal density proliferation, AM sporulation, root activity, and suppressed Fusarium incidence. The post AM development further prevailed the synergistic interaction, and the co-inoculation effect resulted in an increase in fruit nutrition uptake, seasonal cucumber yield and fruit quality attributes. Illumina MiSeq analysis of the 18S rRNA gene amplicons revealed that the dominant AM genera that are particularly enriched with the Glomus taxon may be important ecological drivers associated with plant productivity and fruit quality characteristics. These results suggest that the AM-organic substrate association might be a pragmatic option for use as an economic and efficient biological resource and as a newly-sustainable plant microbe mediator to enhance the regional ecosystem services and plant productivity of the anthropogenic PGVC of this region. View Full-Text
Keywords: garlic substrate; mycorrhizal inoculation; Glomus-AM symbiosis; cucumber yield; fruit quality; AM-fungal community composition garlic substrate; mycorrhizal inoculation; Glomus-AM symbiosis; cucumber yield; fruit quality; AM-fungal community composition
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Ali, A.; Ghani, M.I.; Ding, H.; Fan, Y.; Cheng, Z.; Iqbal, M. Co-Amended Synergistic Interactions between Arbuscular Mycorrhizal Fungi and the Organic Substrate-Induced Cucumber Yield and Fruit Quality Associated with the Regulation of the AM-Fungal Community Structure under Anthropogenic Cultivated Soil. Int. J. Mol. Sci. 2019, 20, 1539.

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