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Microbial Biofertilizers for Crop Improvement: From Molecular Biology to Biotechnology

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Applied Biosciences and Bioengineering".

Deadline for manuscript submissions: closed (31 July 2021) | Viewed by 7918

Special Issue Editor


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Guest Editor
Institute of Plant Biochemistry and Photosynthesis (IBVF) Avda. Américo Vespucio, 49 41092 Seville, Spain
Interests: plant–cyanobacteria symbiosis; microbial biotechnology; soil microbiome; cyanobacteria

Special Issue Information

Dear Colleagues,

It is our pleasure to announce the opening of a new Special Issue “Microbial biofertilizers for crop improvement: from molecular biology to biotechnology” in Applied Sciences.

One of our major current challenges is the development and utilization of environmentally sustainable crop production technologies for ensuring food security. Large amounts of N and P fertilizers are applied for crop production, causing environmental pollution and health problems. In addition to these environmental problems, the long-term use of inorganic fertilizers negatively affects the soil organic matter and the P and N cycles. As a consequence, hypoxic coastal areas, most of them at the delta of important rivers, are under a high risk of eutrophication. The use of plant-growth-promoting bacteria to enhance crop yield and control disease is gaining world-wide acceptance as a sustainable agricultural practice, while reducing costs by supplanting the use of expensive (and polluting) agrochemicals.

The Special Issue “Microbial biofertilizers for crop improvement: from molecular biology to biotechnology” in Applied Sciences has a wide scope, and it is intended to address some of the gaps in our knowledge concerning the management and biotechnological application of microbial biofertilizers. It will deal with topics such as the identification of new microbial biofertilizers and phytostimulants, methods for the analysis of microbial natural products, production/impact/effects of microbial biofertilizers, and management measures related to the use of microbial biofertilizers.

We hope that you will contribute your high-quality research, and we look forward to reading your valuable results.

Dr. Vicente Mariscal
Guest Editor

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. Applied Sciences is an international peer-reviewed open access semimonthly 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 2400 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

  • biofertilizers
  • biodiversity
  • sustainable agriculture
  • plant growth promotion
  • PGPR
  • microbial biotechnology

Published Papers (2 papers)

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Research

12 pages, 16544 KiB  
Article
Sustaining Rice Production through Biofertilization with N2-Fixing Cyanobacteria
by Macarena Iniesta-Pallarés, Consolación Álvarez, Francisco M. Gordillo-Cantón, Carmen Ramírez-Moncayo, Pilar Alves-Martínez, Fernando P. Molina-Heredia and Vicente Mariscal
Appl. Sci. 2021, 11(10), 4628; https://doi.org/10.3390/app11104628 - 19 May 2021
Cited by 9 | Viewed by 3968
Abstract
Current agricultural productivity depends on an exogenous nutrient supply to crops. This is of special relevance in cereal production, a fundamental part of the trophic chain that plays a vital role in the human diet. However, our agricultural practices entail highly detrimental side-effects [...] Read more.
Current agricultural productivity depends on an exogenous nutrient supply to crops. This is of special relevance in cereal production, a fundamental part of the trophic chain that plays a vital role in the human diet. However, our agricultural practices entail highly detrimental side-effects from an environmental point of view. Long-term nitrogen fertilization in croplands results in degradation of soil, water, and air quality, producing eutrophication and subsequently contributing to global warming. In accordance with this, there is a biotechnological interest in using nitrogen-fixing microorganisms to enhance crop growth without adding chemically synthesized nitrogen fertilizers. This is particularly beneficial in paddy fields, where about 60% of the synthetic fertilizer that has been applied is dissolved in the water and washed away. In these agricultural systems, N2-fixing cyanobacteria show a promising biotechnological potential as biofertilizers, improving soil fertility while reducing the environmental impact of the agricultural practice. In the current study, Andalusian paddy fields have been explored to isolate N2-fixing cyanobacteria. These endogenous microorganisms have been subsequently re-introduced in a field trial in order to enhance rice production. Our results provide valuable insights regarding the use of an alternative natural source of nitrogen for rice production. Full article
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18 pages, 2297 KiB  
Article
Daucus carota L. Seed Inoculation with a Consortium of Bacteria Improves Plant Growth, Soil Fertility Status and Microbial Community
by Marika Pellegrini, Giancarlo Pagnani, Massimiliano Rossi, Sara D’Egidio, Maddalena Del Gallo and Cinzia Forni
Appl. Sci. 2021, 11(7), 3274; https://doi.org/10.3390/app11073274 - 6 Apr 2021
Cited by 8 | Viewed by 3001
Abstract
The present work aimed to study suitability of a consortium of Azospirillum brasilense, Gluconacetobacter diazotrophicus, Herbaspirillum seropedicae, and Burkholderia ambifaria as biofertilizers. Strains were assayed for plant growth-promoting characteristics (i.e., auxins production, phosphate solubilizing capability, and 1-aminocyclopropane-1-carboxylate deaminase activity). The [...] Read more.
The present work aimed to study suitability of a consortium of Azospirillum brasilense, Gluconacetobacter diazotrophicus, Herbaspirillum seropedicae, and Burkholderia ambifaria as biofertilizers. Strains were assayed for plant growth-promoting characteristics (i.e., auxins production, phosphate solubilizing capability, and 1-aminocyclopropane-1-carboxylate deaminase activity). The consortium of four bacteria was then inoculated on carrot seeds and tested in an open field experiment. During the open field experiment, plant growth (morphological parameters, chlorophylls, and carotenoids), soil chemical analysis, and molecular and physiological profiles of soils were investigated. Each strain produced different amounts of indole-3acetic acid and several indole-derivates molecules. All strains showed phosphate solubilization capability, while 1-aminocyclopropane-1-carboxylate deaminase activity was only detected in H. seropedicae and B. ambifaria. The bacterial consortium of the four strains gave interesting results in the open field cultivation of carrot. Plant development was positively affected by the presence of the consortium, as was soil fertility and microbial community structure and diversity. The present work allowed for deepening our knowledge on four bacteria, already known for years for having several interesting characteristics, but whose interactions were almost unknown, particularly in view of their use as a consortium in a valid fertilization strategy, in substitution of agrochemicals for a sustainable agriculture. Full article
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