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Plants
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Plant–Microbe Interaction
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Plant–Microbe Interaction

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

Deadline for manuscript submissions: 31 December 2024 | Viewed by 1918

Special Issue Editor

Dr. Gennady V. Pogorelko

E-Mail Website
Guest Editor
Department of Biochemistry, Biophysics, and Molecular Biology, Iowa State University, Ames, IA 50011, USA
Interests: plant biochemistry; plant genetics; plant pathology

Special Issue Information

Dear Colleagues,

Effector proteins are secreted by a variety of pathogens including plant pests. Dozens of such effector proteins produced in different parasitic species have been identified. Published reports confirm that effector proteins, delivered to the infection site, target distinct cellular compartments such as nuclei, cytoplasm and the apoplast, where they execute virulence functions by interacting with host factors. Evidence of host proteins being targeted by effectors to perform virulence functions has been well documented. Although the discovery of effector-interacting host proteins has shed light on the intricate molecular interactions between the host and pathogens, we are still at an early stage of understanding this complex phenomenon, as many of the effectors remain uncharacterized and without predicted functions. Therefore, the study of these key elements of infection process remain very actual.

Dr. Gennady V. Pogorelko
Guest Editor

Manuscript Submission Information

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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. Plants 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 2700 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

  • host–pathogen interaction
  • plant immunity
  • effector proteins
  • pathogen-triggered immunity
  • effector-triggered immunity
  • biotic stress resistance

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Published Papers (2 papers)

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Research

14 pages, 5615 KiB  
Article
CaWRKY22b Plays a Positive Role in the Regulation of Pepper Resistance to Ralstonia solanacearum in a Manner Associated with Jasmonic Acid Signaling
by Lanping Shi, Yuemin Fan, Yingjie Yang, Shuangshuang Yan, Zhengkun Qiu, Zhiqin Liu and Bihao Cao
Plants 2024, 13(15), 2081; https://doi.org/10.3390/plants13152081 - 27 Jul 2024
Viewed by 838
Abstract
As important transcription factors, WRKYs play a vital role in the defense response of plants against the invasion of multiple pathogens. Though some WRKY members have been reported to participate in pepper immunity in response to Ralstonia solanacearum infection, the functions of the [...] Read more.
As important transcription factors, WRKYs play a vital role in the defense response of plants against the invasion of multiple pathogens. Though some WRKY members have been reported to participate in pepper immunity in response to Ralstonia solanacearum infection, the functions of the majority of WRKY members are still unknown. Herein, CaWRKY22b was cloned from the pepper genome and its function against R. solanacearum was analyzed. The transcript abundance of CaWRKY22b was significantly increased in response to the infection of R. solanacearum and the application of exogenous methyl jasmonate (MeJA). Subcellular localization assay in the leaves of Nicotiana benthamiana showed that CaWRKY22b protein was targeted to the nuclei. Agrobacterium-mediated transient expression in pepper leaves indicated that CaWRKY22b overexpression triggered intensive hypersensitive response-like cell death, H2O2 accumulation, and the up-regulation of defense- and JA-responsive genes, including CaHIR1, CaPO2, CaBPR1, and CaDEF1. Virus-induced gene silencing assay revealed that knock-down of CaWRKY22b attenuated pepper’s resistance against R. solanacearum and the up-regulation of the tested defense- and jasmonic acid (JA)-responsive genes. We further assessed the role of CaWRKY22b in modulating the expression of JA-responsive CaDEF1, and the result demonstrated that CaWRKY22b trans-activated CaDEF1 expression by directly binding to its upstream promoter. Collectively, our results suggest that CaWRKY22b positively regulated pepper immunity against R. solanacearum in a manner associated with JA signaling, probably by modulating the expression of JA-responsive CaDEF1. Full article
(This article belongs to the Special Issue Plant–Microbe Interaction)
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15 pages, 6668 KiB  
Article
CaMAPK1 Plays a Vital Role in the Regulation of Resistance to Ralstonia solanacearum Infection and Tolerance to Heat Stress
by Lanping Shi, Wei Shi, Zhengkun Qiu, Shuangshuang Yan, Zhiqin Liu and Bihao Cao
Plants 2024, 13(13), 1775; https://doi.org/10.3390/plants13131775 - 27 Jun 2024
Viewed by 777
Abstract
As an important member of mitogen-activated protein kinase (MAPK) cascades, MAPKs play an important role in plant defense response against biotic and abiotic stresses; however, the involvement of the majority of the MAPK family members against Ralstonia solanacearum and heat stress (HS) remains [...] Read more.
As an important member of mitogen-activated protein kinase (MAPK) cascades, MAPKs play an important role in plant defense response against biotic and abiotic stresses; however, the involvement of the majority of the MAPK family members against Ralstonia solanacearum and heat stress (HS) remains poorly understood. In the present study, CaMAPK1 was identified from the genome of pepper and its function against R. solanacearum and HS was analyzed. The transcript accumulations of CaMAPK1 and the activities of its native promoter were both significantly induced by R. solanacearum inoculation, HS, and the application of exogenous hormones, including SA, MeJA, and ABA. Transient expression of CaMAPK1 showed that CaMAPK1 can be targeted throughout the whole cells in Nicotiana benthamiana and triggered chlorosis and hypersensitive response-like cell death in pepper leaves, accompanied by the accumulation of H2O2, and the up-regulations of hormones- and H2O2-associated marker genes. The knock-down of CaMAPK1 enhanced the susceptibility to R. solanacearum partially by down-regulating the expression of hormones- and H2O2-related genes and impairing the thermotolerance of pepper probably by attenuating CaHSFA2 and CaHSP70-1 transcripts. Taken together, our results revealed that CaMAPK1 is regulated by SA, JA, and ABA signaling and coordinates responses to R. solanacearum infection and HS in pepper. Full article
(This article belongs to the Special Issue Plant–Microbe Interaction)
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