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Agronomy
Special Issues
Plant Nutrition Enhancing Through Microbial Processes in Rhizosphere
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Plant Nutrition Enhancing Through Microbial Processes in Rhizosphere

A special issue of Agronomy (ISSN 2073-4395). This special issue belongs to the section "Soil and Plant Nutrition".

Deadline for manuscript submissions: closed (25 January 2024) | Viewed by 1730

Special Issue Editors

Dr. Mélanie Bressan

E-Mail Website
Guest Editor
AGHYLE Rouen UP 2018.C101, UniLaSalle, SFR NORVEGE FED 4277, 76130 Mont Saint Aignan, France
Interests: plant–microorganism interactions; plant microbiome; biostimulation; biocontrol; plant pathology; plant nutrition; soil biodiversity; agrosystems; agroecological practices
Special Issues, Collections and Topics in MDPI journals
Dr. Isabelle Trinsoutrot-Gattin

E-Mail Website
Guest Editor
Agroecology, Hydrogeochemistry, Environments and Resources (AGHYLE), UniLaSalle, Mont-Saint-Aignan, France
Interests: soil microbial ecology; soil fertility; soil quality; organic matter; soil bioindicators; soil functions; agricultural practices
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Agriculture is in transition process towards Agroecology. The development of alternative solutions to enhance plant nutrition and growth is a critical issue. These solutions could also contribute to increasing crop yield while reducing the dependency on chemical inputs and their negative impact on the environment and health. The question of efficient acquisition of nutrients assumes considering both the plant abilities in relation to soil processes. The key role of microorganisms in nutrients effective supply to plants represent a relevant line of investigation, perfectly anchored in agrosystems sustainability based on the emphasis of natural mechanisms. Numerous microorganisms are known to possess interesting capacities for mineralization, solubilization but also active transport of essential nutrients. The valorization of these promising microbial capacities for plant health through the establishment of beneficial plant–microbe interaction constitutes an important field of research, paving the way to develop relevant agricultural innovations. In this context, a better comprehension of microbial processes implicated in nutrient availability and transport in the rhizosphere as well as the description of the consequences on plant growth are necessary.

This Special Issue will focus on the role of microorganisms to enhance plant nutrition directly or indirectly through targeted soil processes. Innovation solutions based on microbiome engineering, alone or in consortium, native or artificially introduced are all within the scope of this Special Issue. Original research articles and reviews are welcome.

Dr. Mélanie Bressan
Dr. Isabelle Trinsoutrot-Gattin
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Agronomy is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • plant nutrition
  • plant microbiome
  • PGPR
  • arbuscular mycorrhizal fungi
  • phosphate solubilizing microorganisms
  • nitrogen biological fixation
  • biostimulation
  • beneficial plant–microbe interaction
  • agricultural practices
  • biogeochemical cycles

Published Papers (2 papers)

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Research

21 pages, 4078 KiB  
Article
Effect of Bacillus amyloliquefaciens QST713 on Inter-Root Substrate Environment of Cucumber under Low-Calcium Stress
by Bin Li, Li Zhang, Lincao Wei, Yujie Yang, Zhexuan Wang, Bo Qiao and Lingjuan Han
Agronomy 2024, 14(3), 542; https://0-doi-org.brum.beds.ac.uk/10.3390/agronomy14030542 - 7 Mar 2024
Viewed by 699
Abstract
(1) Background: Low-calcium stress can have adverse effects on the rhizosphere environment of cucumber, subsequently impacting cucumber growth. However, plant-growth-promoting rhizobacteria can directly or indirectly enhance plant growth and induce plant tolerance, thereby mitigating the detrimental effects of low-calcium stress on cucumber growth. [...] Read more.
(1) Background: Low-calcium stress can have adverse effects on the rhizosphere environment of cucumber, subsequently impacting cucumber growth. However, plant-growth-promoting rhizobacteria can directly or indirectly enhance plant growth and induce plant tolerance, thereby mitigating the detrimental effects of low-calcium stress on cucumber growth. This study aims to elucidate the role of Bacillus amyloliquefaciens QST713 in the rhizosphere environment of cucumber under low-calcium stress, providing a theoretical basis for the application and promotion of Bacillus amyloliquefaciens. (2) Methods: This study used the ‘JinYou NO.4′ cucumber variety as test material, setting four treatments of CK, CK+Q, LCa, LCa+Q. We conducted measurements of plant height and stem diameter for four groups of cucumber plants: before treatment (0 d), and at 10 d, 20 d, 30 d, and 60 d after treatment. Additionally, we determined the biomass of cucumber plants under different treatments during the peak fruiting period. Inter-root matrix samples of cucumber were collected during the fruiting late period, and the physical and chemical properties and nutrient contents of the inter-root matrix of cucumber were determined, and bacterial microbial diversity and bacterial microbial communities were analysed using Illumina-MiSeq high-throughput sequencing technology. (3) Results: Low-calcium stress significantly inhibits the growth of cucumber plants. However, the application of Bacillus amyloliquefaciens QST713 effectively mitigates the inhibitory effects of low-calcium stress on cucumber growth. The application of Bacillus amyloliquefaciens QST713 was able to improve the physicochemical environment of the matrix and enhanced the absorption and utilisation of matrix nutrients in cucumber. The high-throughput sequencing analysis showed that the richness and diversity of bacterial communities and the number of bacteria decreased significantly under low-calcium stress, and increased significantly after the application of Bacillus amyloliquefaciens QST713. The composition of the dominant bacterial groups of the inter-root matrix of cucumber was basically the same among the four treatments, and the main difference was in the abundance of bacteria. The application of Bacillus amyloliquefaciens QST713 increased the relative abundance of bacteria that decreased under low-calcium stress, and decreased the relative abundance of bacteria that increased under low-calcium stress. (4) Conclusions: The results of this study elucidated the positive effects of Bacillus amyloliquefaciens QST713 on the growth and inter-root environment of cucumber under low-calcium stress, and provided a theoretical basis for in-depth research on the resistance of Bacillus amyloliquefaciens and its popularised application. Full article
(This article belongs to the Special Issue Plant Nutrition Enhancing Through Microbial Processes in Rhizosphere)
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16 pages, 4086 KiB  
Article
The Importance of Considering Levels of P and N Fertilization to Promote Beneficial Interaction between Rapeseed and Phosphate-Solubilizing Bacteria
by Charlotte Amy, Jean-Christophe Avice, Karine Laval, Isabelle Trinsoutrot-Gattin and Mélanie Bressan
Agronomy 2024, 14(2), 334; https://0-doi-org.brum.beds.ac.uk/10.3390/agronomy14020334 - 6 Feb 2024
Viewed by 681
Abstract
Biointrants constitute a promising opportunity to lower mineral input on rapeseed, characterized by high nutrient requirements. As bio-inoculants, phosphate-solubilizing bacteria (PSB) could increase the amount of available P in a soil solution. However, the deployment of these bio-inoculants in fields is not always [...] Read more.
Biointrants constitute a promising opportunity to lower mineral input on rapeseed, characterized by high nutrient requirements. As bio-inoculants, phosphate-solubilizing bacteria (PSB) could increase the amount of available P in a soil solution. However, the deployment of these bio-inoculants in fields is not always successful. Disentangling the factors conditioning their reliability is necessary. Because the activities of microorganisms are particularly subject to nutrient availability, the N fertilization level could represent a key factor for the success of PSB inoculation in the early stages of plant growth. In this study, Pfaba (Pseudomonas sp.), a promising plant growth-promoting rhizobacteria (PGPR) strain isolated from soil, was inoculated on rapeseed grown in rhizotrons under two N fertilization levels (N160 or N80) in P labile or P complexed conditions. Pfaba confirmed its PSB potential to solubilize recalcitrant P complexed forms for the benefit of plant growth, but only when the N supply is adequate (N80). In a P complexed environment, Pfaba tended to increase root and shoot biomass (respectively, from 2.17 ± 0.47 g for control modality to 2.88 ± 0.85 g, and from 6.06 ± 1.67 g for control modality to 8.33 ± 1.70 g), increase the P and N contents in roots (respectively, from 0.15 ± 0.09 mg for control modality to 0.70 ± 0.51 mg, and from 37.90 ± 11.09 mg for control modality to 41.34 ± 14.16 mg), and restore root length at a comparable level than plants supplemented with labile P. Conversely, these positive effects were inhibited with lower levels of N fertilization. Our results highlight the importance of nutrient availability to promote beneficial interaction between plants and microorganisms. These findings could also contribute to ensuring the successful deployment of microbial biointrants. Full article
(This article belongs to the Special Issue Plant Nutrition Enhancing Through Microbial Processes in Rhizosphere)
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