Plant Control of Symbiotic Microbe Behavior and Reproduction 2.0

A special issue of Microorganisms (ISSN 2076-2607). This special issue belongs to the section "Plant Microbe Interactions".

Deadline for manuscript submissions: closed (30 November 2023) | Viewed by 11053

Special Issue Editors


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Co-Guest Editor
Biotechnological & Environmental Sciences Department, Universidad Autonoma de Guadalajara, Patria 1201, Lomas del Valle, Zapopan 45129, Jalisco, Mexico
Interests: abiotic and biotic stress; bio-inoculants; endophytic bacteria; microbiome modulation; nutrient-transfer symbiosis; reactive oxygen species
Special Issues, Collections and Topics in MDPI journals

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Co-Guest Editor
Departament of Biochemistry, Institute of Chemistry, University of São Paulo, Sao Paulo 05508-000, Brazil
Interests: singlet molecular oxygen; hydrogen peroxide; hydroperoxides; oxygen reactive species (ROS); plant microbiome; plant-microbe-ROS interactions;-plant-microbe-ROS (patho)physiology

Special Issue Information

Dear Colleagues,

This Special Issue is the continuation of our previous Special Issue "Plant Control of Symbiotic Microbe Behavior and Reproduction".

Plants are hosts to numerous microbes (mutualists, pathogens and saprobes) on and within their tissues. It is becoming increasingly clear that these associations are not mere chance interactions between plants and microbes, but rather are functional interactions under host selection, control, and regulation. Host plants select microbes that they will permit to enter into their tissues, then they cultivate them, controlling their behaviors and regulating their numbers. Collaboration with microbes is one of the key ways that plants interface with the environment to obtain nutrients and defend themselves from biotic and abiotic stresses and plants rely on microbes to modulate plant development. Since intimate association with microbes that enter into plant tissues is "playing with fire" in the sense that microbes retain a parasitic capacity, the virulence and reproduction of endophytic microbes must be managed by the host plant. In this topic, we will explore the functions of microbes in plant tissues and the ways that plant hosts select and manage the microbes in their tissues.

Prof. Dr. James White
Prof. Dr. Miguel J. Beltrán-García
Prof. Dr. Paolo Di Mascio
Guest Editors

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Published Papers (2 papers)

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Research

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17 pages, 3468 KiB  
Article
Screening for Novel Beneficial Environmental Bacteria for an Antagonism-Based Erwinia amylovora Biological Control
by Guillermo Esteban-Herrero, Belén Álvarez, Ricardo D. Santander and Elena G. Biosca
Microorganisms 2023, 11(7), 1795; https://doi.org/10.3390/microorganisms11071795 - 13 Jul 2023
Cited by 5 | Viewed by 2308
Abstract
Erwinia amylovora, the bacterial species responsible for fire blight, causes major economic losses in pome fruit crops worldwide. Chemical control is not always effective and poses a serious threat to the environment and human health. Social demands for eco-sustainable and safe control [...] Read more.
Erwinia amylovora, the bacterial species responsible for fire blight, causes major economic losses in pome fruit crops worldwide. Chemical control is not always effective and poses a serious threat to the environment and human health. Social demands for eco-sustainable and safe control methods make it necessary to search for new biocontrol strategies such as those based on antagonists. A bacterial collection from different fire blight-free Mediterranean environments was tested for antagonistic activity against Spanish strains of E. amylovora. Antagonistic assays were carried out in vitro in culture medium and ex vivo in immature loquat and pear fruits. Results revealed that 12% of the 82 bacterial isolates tested were able to inhibit the growth of several strains of the pathogen. Some of the isolates also maintained their antagonistic activity even after chloroform inactivation. Selected isolates were further tested ex vivo, with several of them being able to delay and/or reduce fire blight symptom severity in both loquats and pears and having activity against some E. amylovora strains. The isolates showing the best antagonism also produced different hydrolases linked to biocontrol (protease, lipase, amylase, and/or DNAse) and were able to fix molecular nitrogen. Based on this additional characterization, four biocontrol strain candidates were further selected and identified using MALDI-TOF MS. Three of them were Gram-positive bacteria belonging to Bacillus and Paenarthrobacter genera, and the fourth was a Pseudomonas strain. Results provide promising prospects for an improvement in the biological control strategies against fire blight disease. Full article
(This article belongs to the Special Issue Plant Control of Symbiotic Microbe Behavior and Reproduction 2.0)
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Review

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15 pages, 2824 KiB  
Review
Plant Microbiome: An Ocean of Possibilities for Improving Disease Resistance in Plants
by Sajad Ali, Anshika Tyagi and Hanhong Bae
Microorganisms 2023, 11(2), 392; https://doi.org/10.3390/microorganisms11020392 - 3 Feb 2023
Cited by 35 | Viewed by 8077
Abstract
Plant diseases pose a serious threat to crop production and the agricultural economy across the globe. Currently, chemical pesticides are frequently employed to combat these infections, which cause environmental toxicity and the emergence of resistant pathogens. Moreover, the genetic manipulation of plant defense [...] Read more.
Plant diseases pose a serious threat to crop production and the agricultural economy across the globe. Currently, chemical pesticides are frequently employed to combat these infections, which cause environmental toxicity and the emergence of resistant pathogens. Moreover, the genetic manipulation of plant defense pathways and the breeding of resistant genes has attained limited success due to the rapid evolution of pathogen virulence and resistance, together with host range expansion. Additionally, due to climate change and global warming, the occurrence of multiple stresses during disease outbreak has further impacted overall crop growth and productivity, posing a serious threat to food security. In this regard, harnessing the plant beneficial microbiome and its products can provide novel avenues for disease resistance in addition to boosting agricultural output, soil fertility and environmental sustainability. In plant–beneficial microbiome interactions, induced systemic resistance (ISR) has emerged as a key mechanism by which a beneficial microbiome primes the entire plant system for better defense against a wide range of phytopathogens and pests. In this review, we provide the recent developments on the role of plant beneficial microbiomes in disease resistance. We also highlight knowledge gaps and discuss how the plant immune system distinguishes pathogens and beneficial microbiota. Furthermore, we provide an overview on how immune signature hormones, such as salicylic acid (SA), jasmonic acid (JA) and ethylene (ET), shape plant beneficial microbiome. We also discuss the importance of various high-throughput tools and their integration with synthetic biology to design tailored microbial communities for disease resistance. Finally, we conclude by highlighting important themes that need future attention in order to fill the knowledge gaps regarding the plant immune system and plant-beneficial-microbiome-mediated disease resistance. Full article
(This article belongs to the Special Issue Plant Control of Symbiotic Microbe Behavior and Reproduction 2.0)
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