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Beneficial Plant-Microorganisms Interactions: Augmented Defenses of Plants and Physiological Responses
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Beneficial Plant-Microorganisms Interactions: Augmented Defenses of Plants and Physiological Responses

A special issue of Plants (ISSN 2223-7747). This special issue belongs to the section "Plant Protection and Biotic Interactions".

Deadline for manuscript submissions: 30 November 2024 | Viewed by 4539

Special Issue Editor

Dr. Daiana Garcia

E-Mail Website
Guest Editor
Laboratorio de Ecología Microbiana, Departamento de Microbiología e Inmunología, Facultad de Ciencias Exactas Físico Químicas y Naturales, Universidad Nacional de Río Cuarto, Ruta 36 Km 601 (X5806JRA), Río Cuarto, Córdoba, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
Interests: Biological science, moulds, mycotoxins, Plant health-Pests, biocontrol, Plant-microorganism

Special Issue Information

Dear Colleagues,

There is a need to supply global demand for food and feed in a climate change context has stimulated the interest in ecological products to increase their productivity. However, emerging infectious diseases of various crops cause their yield to decrease. In many cases, these infections are treated with chemicals that are harmful to the environment and human and animal health. In this sense, an alternative to traditional chemicals compounds involves the use of beneficial organisms and natural products to improve food and feed performance and control pests and diseases. For example, biological control agents (BCA) interact with pathogens directly or by inducing a physiological state of resistance to the plant being beneficial against infections. Those comprises several mechanisms such as interference with phytohormone pathways, compatible solutes, changes in levels of reactive oxygen compounds, between others. In this way, this issue proposes obtaining work on various CBAs or natural substances that induce physiological changes in the biochemical compounds of plants of economic importance (cereals, oilseeds, vegetables, fruit trees, etc.) which are beneficial for them by protecting them of emerging diseases. Knowing the form of action of these microorganisms or natural substances and the type of activation of the immune response in plants, it could advance in the development process of future natural biocide products.

Dr. Daiana Garcia
Guest Editor

Manuscript Submission Information

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Keywords

  • plant infections
  • plant-microorganism interaction
  • biocontrol plant physiological responses
  • plan defenses elicitors

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Published Papers (3 papers)

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Research

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16 pages, 4096 KiB  
Article
Exploring Endophytic Bacteria from Artemisia spp. and Beneficial Traits on Pea Plants
by Shervin Hadian, Donald L. Smith, Stanislav Kopriva, Eglė Norkevičienė and Skaidrė Supronienė
Plants 2024, 13(12), 1684; https://doi.org/10.3390/plants13121684 - 18 Jun 2024
Viewed by 1050
Abstract
Endophytic microorganisms represent promising solutions to environmental challenges inherent in conventional agricultural practices. This study concentrates on the identification of endophytic bacteria isolated from the root, stem, and leaf tissues of four Artemisia plant species. Sixty-one strains were isolated and sequenced by 16S [...] Read more.
Endophytic microorganisms represent promising solutions to environmental challenges inherent in conventional agricultural practices. This study concentrates on the identification of endophytic bacteria isolated from the root, stem, and leaf tissues of four Artemisia plant species. Sixty-one strains were isolated and sequenced by 16S rDNA. Sequencing revealed diverse genera among the isolated bacteria from different Artemisia species, including Bacillus, Pseudomonas, Enterobacter, and Lysinibacillus. AR11 and VR24 obtained from the roots of A. absinthium and A. vulgaris demonstrated significant inhibition on Fusarium c.f. oxysporum mycelial growth. In addition, AR11, AR32, and CR25 exhibited significant activity in phosphatase solubilization, nitrogen fixation, and indole production, highlighting their potential to facilitate plant growth. A comparative analysis of Artemisia species showed that root isolates from A. absinthium, A. campestris, and A. vulgaris have beneficial properties for inhibiting pathogen growth and enhancing plant growth. AR11 with 100% similarity to Bacillus thuringiensis, could be considered a promising candidate for further investigation as microbial biofertilizers. This finding highlights their potential as environmentally friendly alternatives to chemical pesticides, thereby contributing to sustainable crop protection practices. Full article
(This article belongs to the Special Issue Beneficial Plant-Microorganisms Interactions: Augmented Defenses of Plants and Physiological Responses)
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16 pages, 3150 KiB  
Article
Trichoderma virens and Pseudomonas chlororaphis Differentially Regulate Maize Resistance to Anthracnose Leaf Blight and Insect Herbivores When Grown in Sterile versus Non-Sterile Soils
by Pei-Cheng Huang, Peiguo Yuan, John M. Grunseich, James Taylor, Eric-Olivier Tiénébo, Elizabeth A. Pierson, Julio S. Bernal, Charles M. Kenerley and Michael V. Kolomiets
Plants 2024, 13(9), 1240; https://doi.org/10.3390/plants13091240 - 30 Apr 2024
Viewed by 1286
Abstract
Soil-borne Trichoderma spp. have been extensively studied for their biocontrol activities against pathogens and growth promotion ability in plants. However, the beneficial effect of Trichoderma on inducing resistance against insect herbivores has been underexplored. Among diverse Trichoderma species, consistent with previous reports, we [...] Read more.
Soil-borne Trichoderma spp. have been extensively studied for their biocontrol activities against pathogens and growth promotion ability in plants. However, the beneficial effect of Trichoderma on inducing resistance against insect herbivores has been underexplored. Among diverse Trichoderma species, consistent with previous reports, we showed that root colonization by T. virens triggered induced systemic resistance (ISR) to the leaf-infecting hemibiotrophic fungal pathogens Colletotrichum graminicola. Whether T. virens induces ISR to insect pests has not been tested before. In this study, we investigated whether T. virens affects jasmonic acid (JA) biosynthesis and defense against fall armyworm (FAW) and western corn rootworm (WCR). Unexpectedly, the results showed that T. virens colonization of maize seedlings grown in autoclaved soil suppressed wound-induced production of JA, resulting in reduced resistance to FAW. Similarly, the bacterial endophyte Pseudomonas chlororaphis 30-84 was found to suppress systemic resistance to FAW due to reduced JA. Further comparative analyses of the systemic effects of these endophytes when applied in sterile or non-sterile field soil showed that both T. virens and P. chlororaphis 30-84 triggered ISR against C. graminicola in both soil conditions, but only suppressed JA production and resistance to FAW in sterile soil, while no significant impact was observed when applied in non-sterile soil. In contrast to the effect on FAW defense, T. virens colonization of maize roots suppressed WCR larvae survival and weight gain. This is the first report suggesting the potential role of T. virens as a biocontrol agent against WCR. Full article
(This article belongs to the Special Issue Beneficial Plant-Microorganisms Interactions: Augmented Defenses of Plants and Physiological Responses)
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Review

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20 pages, 1457 KiB  
Review
Physiological Effects of Microbial Biocontrol Agents in the Maize Phyllosphere
by María Fiamma Grossi Vanacore, Melina Sartori, Francisco Giordanino, Germán Barros, Andrea Nesci and Daiana García
Plants 2023, 12(24), 4082; https://doi.org/10.3390/plants12244082 - 6 Dec 2023
Cited by 1 | Viewed by 1701
Abstract
In a world with constant population growth, and in the context of climate change, the need to supply the demand of safe crops has stimulated an interest in ecological products that can increase agricultural productivity. This implies the use of beneficial organisms and [...] Read more.
In a world with constant population growth, and in the context of climate change, the need to supply the demand of safe crops has stimulated an interest in ecological products that can increase agricultural productivity. This implies the use of beneficial organisms and natural products to improve crop performance and control pests and diseases, replacing chemical compounds that can affect the environment and human health. Microbial biological control agents (MBCAs) interact with pathogens directly or by inducing a physiological state of resistance in the plant. This involves several mechanisms, like interference with phytohormone pathways and priming defensive compounds. In Argentina, one of the world’s main maize exporters, yield is restricted by several limitations, including foliar diseases such as common rust and northern corn leaf blight (NCLB). Here, we discuss the impact of pathogen infection on important food crops and MBCA interactions with the plant’s immune system, and its biochemical indicators such as phytohormones, reactive oxygen species, phenolic compounds and lytic enzymes, focused mainly on the maize–NCLB pathosystem. MBCA could be integrated into disease management as a mechanism to improve the plant’s inducible defences against foliar diseases. However, there is still much to elucidate regarding plant responses when exposed to hemibiotrophic pathogens. Full article
(This article belongs to the Special Issue Beneficial Plant-Microorganisms Interactions: Augmented Defenses of Plants and Physiological Responses)
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