ISSN: 0973-7510

E-ISSN: 2581-690X

Research Article | Open Access
Yaser Ayesh AlMaroai1,2
1Department of Biology, Faculty of Applied Science, Umm Al-Qura University, Makkah 21421, Saudi Arabia.
2Research Laboratories Centre, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia.
J. Pure Appl. Microbiol., 2019, 13 (4): 2087-2095 | Article Number: 5728 | © The Author(s). 2019
Received: 03/06/2019 | Accepted: 22/07/2019 | Published: 16/12/2019

A greenhouse nursery study was conducted to assess the interactive effects of arbuscular mycorrhizal (AM) fungus (Glomus mosseae) and nitrogen-fixing bacteria (Azotobacter chroococcum) on leading microorganisms group, growth, and nutrition of onion plants grown in unsterile calcareous soil in a greenhouse pot experiment. The results showed that Glomus mosseae and Azotobacter chroococcum significantly (P=0.05) increased bacterial, actinomycetes, Azotobacter count, and nitrogenase activity in onion rhizosphere. Moreover, coupling both organisms significantly increased sporulation and mycorrhizal infection of onion plant roots. Dry weight, nitrogen, and phosphorus uptake of shoots of dually inoculated plants were far higher than of shoots of plants inoculated with either microorganisms. It could conclude that microbial soil co-inoculation Glomus mosseae and Azotobacter chroococcum significantly enhance plant growth, N and P uptake of onion, and the strategy may be applied to obtain better crop productivity.


Inoculation; Arbuscular Mycorrhizal; Nitrogen fixation; Rhizosphere microflora; Nirtogenase activity.

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© The Author(s) 2019. Open Access. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License which permits unrestricted use, sharing, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.