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Plant Pathogen Interactions 2.0
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Plant Pathogen Interactions 2.0

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Molecular Plant Sciences".

Deadline for manuscript submissions: closed (30 May 2024) | Viewed by 1947

Special Issue Editors

Dr. Jessie Fernandez

E-Mail Website
Guest Editor
Department of Microbiology and Cell Science, University of Florida, Gainesville, FL 32610, USA
Interests: fungal biology; plant pathogens; plant–microbe interactions; effector biology; rice blast disease
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Sixue Chen

E-Mail Website
Guest Editor
Department of Biology, University of Mississippi, Oxford, MS 38677, USA
Interests: disease triangle; guard cells; glucosinolates; proteomics; metabolomics; mass spectrometry
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Plant pathogens represent a significant threat to agricultural systems, causing major damage to the food industry worldwide. Pathogens are constantly adapting to evade or suppress plant defense responses to cause disease. Despite this, plants have evolved sophisticated approaches to recognize and restrict the pathogen to the infection site. A unique and intimate association between plant and pathogens is created as they are in a constant arms race to coexist or compete for survival in nature. Deciphering how plant–pathogen interactions are established is not only an essential aspect in plant pathology but also extremely important for crop improvement, sustainability, and global food security. This Special Issue on “Plant–Pathogen Interactions” welcomes original research and review articles that present recent advances in the field, with a focus on but not limited to the molecular mechanisms underlining disease progression, effector biology, plant immunity, and virulence factors. New molecular approaches or tools (including omics or multi-omics) to study plant–pathogens interactions are also welcome.

Dr. Jessie Fernandez
Prof. Dr. Sixue Chen
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. International Journal of Molecular Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. There is an Article Processing Charge (APC) for publication in this open access journal. For details about the APC please see here. 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

  • pathogenicity
  • plant immunity
  • pattern-triggered immunity (PTI)
  • effector-triggered immunity (ETI)
  • effectors
  • avirulent
  • virulent
  • biotroph
  • necrotroph
  • interactions

Published Papers (3 papers)

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Research

20 pages, 5529 KiB  
Article
Employing Genomic Tools to Explore the Molecular Mechanisms behind the Enhancement of Plant Growth and Stress Resilience Facilitated by a Burkholderia Rhizobacterial Strain
by Yueh-Long Chang, Yu-Cheng Chang, Andi Kurniawan, Po-Chun Chang, Ting-Yu Liou, Wen-Der Wang and Huey-wen Chuang
Int. J. Mol. Sci. 2024, 25(11), 6091; https://doi.org/10.3390/ijms25116091 - 31 May 2024
Abstract
The rhizobacterial strain BJ3 showed 16S rDNA sequence similarity to species within the Burkholderia genus. Its complete genome sequence revealed a 97% match with Burkholderia contaminans and uncovered gene clusters essential for plant-growth-promoting traits (PGPTs). These clusters include genes responsible for producing indole [...] Read more.
The rhizobacterial strain BJ3 showed 16S rDNA sequence similarity to species within the Burkholderia genus. Its complete genome sequence revealed a 97% match with Burkholderia contaminans and uncovered gene clusters essential for plant-growth-promoting traits (PGPTs). These clusters include genes responsible for producing indole acetic acid (IAA), osmolytes, non-ribosomal peptides (NRPS), volatile organic compounds (VOCs), siderophores, lipopolysaccharides, hydrolytic enzymes, and spermidine. Additionally, the genome contains genes for nitrogen fixation and phosphate solubilization, as well as a gene encoding 1-aminocyclopropane-1-carboxylate (ACC) deaminase. The treatment with BJ3 enhanced root architecture, boosted vegetative growth, and accelerated early flowering in Arabidopsis. Treated seedlings also showed increased lignin production and antioxidant capabilities, as well as notably increased tolerance to water deficit and high salinity. An RNA-seq transcriptome analysis indicated that BJ3 treatment significantly activated genes related to immunity induction, hormone signaling, and vegetative growth. It specifically activated genes involved in the production of auxin, ethylene, and salicylic acid (SA), as well as genes involved in the synthesis of defense compounds like glucosinolates, camalexin, and terpenoids. The expression of AP2/ERF transcription factors was markedly increased. These findings highlight BJ3’s potential to produce various bioactive metabolites and its ability to activate auxin, ethylene, and SA signaling in Arabidopsis, positioning it as a new Burkholderia strain that could significantly improve plant growth, stress resilience, and immune function. Full article
(This article belongs to the Special Issue Plant Pathogen Interactions 2.0)
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20 pages, 4126 KiB  
Article
The Transcriptional Regulator TfmR Directly Regulates Two Pathogenic Pathways in Xanthomonas oryzae pv. oryzicola
by Zheng Chang, Zengfeng Ma, Qian Su, Xinqi Xia, Wenxin Ye, Ruifang Li and Guangtao Lu
Int. J. Mol. Sci. 2024, 25(11), 5887; https://doi.org/10.3390/ijms25115887 - 28 May 2024
Viewed by 218
Abstract
Xanthomonas oryzae pv. oryzicola (Xoc) is a notorious plant pathogen. Like most bacterial pathogens, Xoc has evolved a complex regulatory network to modulate the expression of various genes related to pathogenicity. Here, we have identified TfmR, a transcriptional regulator belonging to the [...] Read more.
Xanthomonas oryzae pv. oryzicola (Xoc) is a notorious plant pathogen. Like most bacterial pathogens, Xoc has evolved a complex regulatory network to modulate the expression of various genes related to pathogenicity. Here, we have identified TfmR, a transcriptional regulator belonging to the TetR family, as a key player in the virulence mechanisms of this phytopathogenic bacterium. We have demonstrated genetically that tfmR is involved in the hypersensitive response (HR), pathogenicity, motility and extracellular polysaccharide production of this phytopathogenic bacterium. Our investigations extended to exploring TfmR’s interaction with RpfG and HrpX, two prominent virulence regulators in Xanthomonas species. We found that TfmR directly binds to the promoter region of RpfG, thereby positively regulating its expression. Notably, constitutive expression of RpfG partly reinstates the pathogenicity compromised by TfmR-deletion mutants. Furthermore, our studies revealed that TfmR also exerts direct positive regulation on the expression of the T3SS regulator HrpX. Similar to RpfG, sustained expression of HrpX partially restores the pathogenicity of TfmR-deletion mutants. These findings underscore TfmR’s multifaceted role as a central regulator governing key virulence pathways in Xoc. Importantly, our research sheds light on the intricate molecular mechanisms underlying the regulation of pathogenicity in this plant pathogen. Full article
(This article belongs to the Special Issue Plant Pathogen Interactions 2.0)
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14 pages, 2799 KiB  
Article
Overexpression of the First Peanut-Susceptible Gene, AhS5H1 or AhS5H2, Enhanced Susceptibility to Pst DC3000 in Arabidopsis
by Bingbing Liang, Yuanjun Bai, Chaoqun Zang, Xue Pei, Jinhui Xie, Ying Lin, Xiaozhou Liu, Taswar Ahsan and Chunhao Liang
Int. J. Mol. Sci. 2023, 24(18), 14210; https://doi.org/10.3390/ijms241814210 - 18 Sep 2023
Cited by 1 | Viewed by 855
Abstract
Salicylic acid (SA) serves as a pivotal plant hormone involved in regulating plant defense mechanisms against biotic stresses, but the extent of its biological significance in relation to peanut resistance is currently lacking. This study elucidated the involvement of salicylic acid (SA) in [...] Read more.
Salicylic acid (SA) serves as a pivotal plant hormone involved in regulating plant defense mechanisms against biotic stresses, but the extent of its biological significance in relation to peanut resistance is currently lacking. This study elucidated the involvement of salicylic acid (SA) in conferring broad-spectrum disease resistance in peanuts through the experimental approach of inoculating SA-treated leaves. In several other plants, the salicylate hydroxylase genes are the typical susceptible genes (S genes). Here, we characterized two SA hydroxylase genes (AhS5H1 and AhS5H2) as the first S genes in peanut. Recombinant AhS5H proteins catalyzed SA in vitro, and showed SA 5-ydroxylase (S5H) activity. Overexpression of AhS5H1 or AhS5H2 decreased SA content and increased 2,5-DHBA levels in Arabidopsis, suggesting that both enzymes had a similar role in planta. Moreover, overexpression of each AhS5H gene increased susceptibility to Pst DC3000. Analysis of the transcript levels of defense-related genes indicated that the expression of AhS5H genes, AhNPR1 and AhPR10 was simultaneously induced by chitin. Overexpression of each AhS5H in Arabidopsis abolished the induction of AtPR1 or AtPR2 upon chitin treatment. Eventually, AhS5H2 expression levels were highly correlated with SA content in different tissues of peanut. Hence, the expression of AhS5H1 and AhS5H2 was tissue-specific. Full article
(This article belongs to the Special Issue Plant Pathogen Interactions 2.0)
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