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Agronomy
Special Issues
Role of Plant-Growth-Promoting Microorganisms in Agriculture: Mitigating Climate Change Impact
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Role of Plant-Growth-Promoting Microorganisms in Agriculture: Mitigating Climate Change Impact

A special issue of Agronomy (ISSN 2073-4395). This special issue belongs to the section "Agroecology Innovation: Achieving System Resilience".

Deadline for manuscript submissions: 15 September 2024 | Viewed by 2889

Special Issue Editors

Dr. Elžbieta Jankovska-Bortkevič

E-Mail Website
Guest Editor
Nature Research Centre, Laboratory of Plant Physiology, Akademijos Str. 2, LT-08412 Vilnius, Lithuania
Interests: plant physiology; abiotic stress; growth regulators; organic agriculture; sustainable agriculture
Dr. Sigita Jurkonienė

E-Mail Website
Guest Editor
Nature Research Centre, Laboratory of Plant Physiology, Akademijos Str. 2, LT-08412 Vilnius, Lithuania
Interests: plant physiology; abiotic stress; growth regulators; organic agriculture; sustainable agriculture

Special Issue Information

Dear Colleagues,

The term plant-growth-promoting microorganism applies to all microorganisms (e.g., bacteria, actinomycetes, fungi, and algae). Plant-growth-promoting microorganisms have been shown to have a beneficial effect on plant growth through the action of either direct or indirect mechanisms. They increase the yield of various crops, improve soil fertility, promote diversity and interaction with other beneficial microorganisms, inhibit the growth of pathogens, and support the sustainability of the systems. Considering that climate change is a threat to plants and its mitigation remains a major challenge for humanity, it would be useful to have more knowledge about the influence of plant-growth-promoting microorganisms on plant response to changing climate conditions. This Special Issue will focus on the gathering of the available scientifical information on the role of plant-growth-promoting microbes in mitigating the impact of climate change on agriculture. Both the submission of reviews and research articles are welcomed.

Dr. Elžbieta Jankovska-Bortkevič
Dr. Sigita Jurkonienė
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

  • bacteria
  • biofertilizer
  • biostimulants
  • climate change
  • crop
  • environmental factors
  • probiotics
  • plant stress

Published Papers (3 papers)

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Research

19 pages, 10987 KiB  
Article
Exploring the Impact of Endophytic Fungus Aspergillus cejpii DMKU-R3G3 on Rice: Plant Growth Promotion and Molecular Insights through Proteomic Analysis
by Kantinan Leetanasaksakul, Sittiruk Roytrakul, Suthathip Kittisenachai, Karan Lohmaneeratana, Chatchawan Jantasuriyarat and Piyangkun Lueangjaroenkit
Agronomy 2024, 14(3), 498; https://0-doi-org.brum.beds.ac.uk/10.3390/agronomy14030498 - 28 Feb 2024
Viewed by 989
Abstract
Rice is a crucial crop for many people worldwide, especially in regions like Asia, Latin America, and parts of Africa. Thailand is one of the largest exporters of rice. Nowadays, farmers use chemicals to control rice disease, which can have negative effects on [...] Read more.
Rice is a crucial crop for many people worldwide, especially in regions like Asia, Latin America, and parts of Africa. Thailand is one of the largest exporters of rice. Nowadays, farmers use chemicals to control rice disease, which can have negative effects on humans and the environment. Therefore, the objective of this study was to examine the plant-promoting capabilities of the endophytic fungal strains DMKU-R3G3 in greenhouse settings. The endophytic fungi strain DMKU-R3G3, which was isolated from organic rice root, was identified as Aspergillus cejpii based on morphological characteristics and phylogenetic analysis. The production of IAA was detected using Salkowski’s reagent. After 7 days of incubation, the finding revealed that the strain cultivated in PDB supplemented with tryptophan yielded a greater concentration of IAA (25.45 μg/mL). The inoculation with A. cejpii DMKU-R3G3 significantly enhanced rice growth, as evidenced by notable increases in shoot height, root length, and fresh weight. Moreover, the chlorophyll content of the rice plants also increased by 1.78 times more than the control group. In addition, proteomic analysis revealed that rice responded toward the colonization of endophytic fungi by producing auxin-responsive proteins to regulate the IAA content in plant tissue and inducing total chlorophyll production due to the up-regulation of proteins in the chlorophyll biosynthesis pathway. The results obtained from this study lead to the conclusion that the A. cejpii strain DMKU-R3G3 possesses the capability to enhance plant growth through the production of phytohormones in greenhouse conditions. Therefore, endophytic A. cejpii DMKU-R3G3 has the potential to be a promising eco-friendly plant growth promoter for sustainable rice cultivation. Full article
(This article belongs to the Special Issue Role of Plant-Growth-Promoting Microorganisms in Agriculture: Mitigating Climate Change Impact)
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23 pages, 10043 KiB  
Article
Impact of Potassium-Solubilizing Microorganisms with Potassium Sources on the Growth, Physiology, and Productivity of Wheat Crop under Salt-Affected Soil Conditions
by Hend Mostafa El-Egami, Rehab H. Hegab, Heba Montaser, Mohammed Mohammed El-Hawary and Mirza Hasanuzzaman
Agronomy 2024, 14(3), 423; https://0-doi-org.brum.beds.ac.uk/10.3390/agronomy14030423 - 22 Feb 2024
Cited by 1 | Viewed by 921
Abstract
Salinity adversely affects plant growth and productivity worldwide. To overcome salinity and other abiotic stresses, safe, ecofriendly biofertilizers that stimulate productivity have been experiencing rising demand, alongside decreasing use of mineral fertilizers. The purpose of this study was to examine changes in the [...] Read more.
Salinity adversely affects plant growth and productivity worldwide. To overcome salinity and other abiotic stresses, safe, ecofriendly biofertilizers that stimulate productivity have been experiencing rising demand, alongside decreasing use of mineral fertilizers. The purpose of this study was to examine changes in the growth, yield, physiological and biochemical parameters of wheat crop as a response to two potassium-solubilizing microorganisms (KSMs), Trichoderma asperellum and Bacillus circulans, with 50% or 75% of the recommended amount of K fertilizer (potassium sulphate), combined with no or 25% feldspar as well as 1.5% potassium sulphate (K-leaf) as foliar application, and all treatments were compared with a control treatment under salt-affected soil conditions, during two winter seasons in 2019–2020 and 2020–2021. The randomized complete block design (RCBD) was used to set up the experiment. Results showed that the vegetative growth, yield, physiological and biochemical parameters were affected under salt-affected soil conditions. Nevertheless, inoculation with T. asperellum and B. circulans with potassium application mitigated the deleterious effect of salt-affected soil conditions by improving growth parameters, photosynthetic pigment content, antioxidant enzymes (superoxide dismutase, ascorbate peroxidase, catalase and peroxidase) content, total soluble sugars, relative water content, potassium content in leaves, grains yield, and some biochemical constituents in the grains and straw. Meanwhile, these treatments decreased proline content, Na+ content in leaves, and the Na+/K+ ratio as compared to the control treatment. The most pronounced treatment, inoculation by B. circulans with 1.5% K-leaf as foliar application, significantly increased grain yield by 16.41% relative to the control treatment. It could be concluded that inoculating wheat with KSMs T. asperellum and B. circulans with 1.5% K-leaf as foliar application will increase wheat salinity tolerance and wheat productivity and decrease the detrimental effect of salinity on wheat growth and grain yield quantity and quality under salt-affected soils conditions. Full article
(This article belongs to the Special Issue Role of Plant-Growth-Promoting Microorganisms in Agriculture: Mitigating Climate Change Impact)
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14 pages, 2032 KiB  
Article
Effects of Azotobacter and Carbon Dioxide Concentrations on the Growth and Yield of Rice Plants Grown in Two Paddy Soils
by Syuan-Lu Chen and Cheng-Hua Huang
Agronomy 2023, 13(12), 2998; https://0-doi-org.brum.beds.ac.uk/10.3390/agronomy13122998 - 6 Dec 2023
Viewed by 721
Abstract
Rice is an important staple crop influenced by rising CO2 and related climate change, but it is not well-known how N-fixing Azotobacter affects rice growth and yield under different CO2 concentrations. This study aimed to determine the effects of Azotobacter strains [...] Read more.
Rice is an important staple crop influenced by rising CO2 and related climate change, but it is not well-known how N-fixing Azotobacter affects rice growth and yield under different CO2 concentrations. This study aimed to determine the effects of Azotobacter strains on the growth and yield of rice plants grown in two paddy soils under varying CO2 conditions. Rice plants inoculated with three Azotobacter strains were grown in a conventional rice soil (Dali) and an organic rice soil (Houlong) under 500 or 1000 ppm CO2. These three Azotobacter strains significantly increased the harvest index of rice plants grown in Dali soil under 1000 ppm CO2, but they did not significantly increase the harvest index for rice plants grown in Houlong soil under elevated CO2. Interestingly, only A. beijerinckii CHB 461 significantly promoted the thousand-grain weight of rice plants grown in both Dali and Houlong soils under elevated CO2. Dali soil had a high level of soil organic matter, exchangeable Ca and Mg, and available Cu and Zn, probably resulting in a better response of the rice plants to Azotobacter inoculation under elevated CO2. In conclusion, in the application of Azotobacter to promote rice growth and yield under future rising CO2 conditions, the soil properties and characteristics of Azotobacter strains may need to be considered. Full article
(This article belongs to the Special Issue Role of Plant-Growth-Promoting Microorganisms in Agriculture: Mitigating Climate Change Impact)
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