scholarly journals Induce the plant resistance to pathogen infection

2014 ◽  
Vol 20 (1-2) ◽  
Author(s):  
A. Ezzat ◽  
Z. Szabó ◽  
J. Nyéki
Keyword(s):  
Gene Expression ◽  
Salicylic Acid ◽  
Systemic Acquired Resistance ◽  
Induced Defense ◽  
Acquired Resistance ◽  
Vital Role ◽  
Signal Molecule ◽  
Pathogenesis Related ◽  
Related Proteins ◽  
Direct Toxicity

Systemic acquired resistance (SAR) is a mechanism of induced defense that confers long-lasting protection against a broad spectrum of microorganisms. Salicylic acid (SA) is the signal molecule which is required for induce SAR and is associated with accumulation of pathogenesis-related proteins, which are thought to contribute to resistance. SA paly vital role in some related resistance gene expression in plant cell which have direct or indirect effect on pathogen growth as SA has direct toxicity for pathogen and in the same time has stimulation effect for some enzyme related to reduce the oxidative burst.

scholarly journals Systemic Acquired Resistance in Canola Is Linked with Pathogenesis-Related Gene Expression and Requires Salicylic Acid

2007 ◽  
Vol 97 (7) ◽  
pp. 794-802 ◽  
Author(s):  
Shobha D. Potlakayala ◽  
Darwin W. Reed ◽  
Patrick S. Covello ◽  
Pierre R. Fobert
Keyword(s):  
Salicylic Acid ◽  
Pseudomonas Syringae ◽  
Systemic Acquired Resistance ◽  
Induced Defense ◽  
Acquired Resistance ◽  
Microbial Pathogens ◽  
Broad Host Range ◽  
Avirulent Strain ◽  
Enhanced Resistance ◽  
Pathogenesis Related

Systemic acquired resistance (SAR) is an induced defense response that confers long-lasting protection against a broad range of microbial pathogens. Here we show that treatment of Brassica napus plants with the SAR-inducing chemical benzo-(1,2,3)-thiadiazole-7-carbothioic acid S-methyl ester (BTH) significantly enhanced resistance against virulent strains of the bacterial pathogen Pseudomonas syringae pv. maculicola and the fungal pathogen Leptosphaeria maculans. Localized preinoculation of plants with an avirulent strain of P. syringae pv. maculicola also enhanced resistance to these pathogens but was not as effective as BTH treatment. Single applications of either SAR-inducing pretreatment were effective against P. syringae pv. maculicola, even when given more than 3 weeks prior to the secondary challenge. The pretreatments also led to the accumulation of pathogenesis-related (PR) genes, including BnPR-1 and BnPR-2, with higher levels of transcripts observed in the BTH-treatment material. B. napus plants expressing a bacterial salicylate hydroxylase transgene (NahG) that metabolizes salicylic acid to catechol were substantially compromised in SAR and accumulated reduced levels of PR gene transcripts when compared with untransformed controls. Thus, SAR in B. napus displays many of the hallmarks of classical SAR including long lasting and broad host range resistance, association with PR gene activation, and a requirement for salicylic acid.

scholarly journals Arabidopsis thaliana EDS4 Contributes to Salicylic Acid (SA)-Dependent Expression of Defense Responses: Evidence for Inhibition of Jasmonic Acid Signaling by SA

2000 ◽  
Vol 13 (5) ◽  
pp. 503-511 ◽  
Author(s):  
Vaijayanti Gupta ◽  
Michael G. Willits ◽  
Jane Glazebrook
Keyword(s):  
Gene Expression ◽  
Salicylic Acid ◽  
Jasmonic Acid ◽  
Pseudomonas Syringae ◽  
Systemic Acquired Resistance ◽  
Acquired Resistance ◽  
Defense Responses ◽  
Avirulence Gene ◽  
Signal Molecule ◽  
Resistance Response

The Arabidopsis enhanced disease susceptibility 4 (eds4) mutation causes enhanced susceptibility to infection by the bacterial pathogen Pseudomonas syringae pv. Maculicola ES4326 (Psm ES4326). Gene-for-gene resistance to bacteria carrying the avirulence gene avrRpt2 is not significantly affected by eds4. Plants homozygous for eds4 exhibit reduced expression of the pathogenesis-related gene PR-1 after infection by Psm ES4326, weakened responses to treatment with the signal molecule salicylic acid (SA), impairment of the systemic acquired resistance response, and reduced accumulation of SA after infection with Psm ES4326. These phenotypes indicate that EDS4 plays a role in SA-dependent signaling. SA has been shown to have a negative effect on activation of gene expression by the signal molecule jasmonic acid (JA). Two mutations that cause reduced SA levels, eds4 and pad4, cause heightened responses to inducers of JA-dependent gene expression, providing genetic evidence to support the idea that SA interferes with JA-dependent signaling. Two possible working models of the role of EDS4 in governing activation of defense responses are presented.

scholarly journals Research progress of NPR genes in signal pathway of salicylic acid mediated plant disease resistance

2020 ◽  
Vol 145 ◽  
pp. 01038
Author(s):  
Pan Wang ◽  
Meiqin Xiang
Keyword(s):  
Salicylic Acid ◽  
Disease Resistance ◽  
Plant Disease Resistance ◽  
Plant Disease ◽  
Systemic Acquired Resistance ◽  
Acquired Resistance ◽  
Signal Transduction Pathway ◽  
Research Progress ◽  
Signal Molecule ◽  
Pathogenesis Related

Salicylic acid (SA) is considered to be an endogenous signal molecule in plants, and it is related to many resistances in plants. In Arabidopsis, Non-expressor of pathogenesis-related gene1 (NPR1) mediates the expression of pathogenesis-related genes (PRs) and systemic acquired resistance (SAR) induced by SA. NPR1 is a key factor in SA signaling pathway, and the research shows that NPR1, NPR3 and NPR4 play a key role in SA mediated plant disease resistance. In this review, the interaction between NPR and transcription factors is discussed, and we also describe the progress of NPR in SA mediated SAR signal transduction pathway, likewise, we introduce the relationship between NPR1 and its paralogues NPR3/NPR4. This paper analyzes the research prospect of NPR as the intersection of multiple signal paths.

scholarly journals Biochemical basis of systemic acquired resistance induced by different Systemic Acquired Resistance (SAR) elicitors in Brassica cultivars challenge inoculated with downy mildew pathogen

2021 ◽  
Vol 13 (1) ◽  
pp. 301-307
Author(s):  
Astha ◽  
P. S. Sekhon
Keyword(s):  
Salicylic Acid ◽  
Jasmonic Acid ◽  
Disease Control ◽  
Downy Mildew ◽  
Systemic Acquired Resistance ◽  
Acquired Resistance ◽  
Fresh Weight ◽  
Pathogenesis Related ◽  
Cent Disease ◽  
Related Proteins

In India, Brassica is attacked by many bacterial, fungal and viral pathogens causing various diseases among which, downy mildew caused by Hyaloperonospora brassicae, an oomycete is the most severe one.  The present investigation was conducted to reduce fungicide load on Brassica by testing an alternate method of disease control.  Different Systemic Acquired Resistance (SAR) compounds were tested as foliar sprays like Salicylic acid, Jasmonic acid and Bion (Benzothiadiazole-BTH) for inducing resistance in different genotypes of Raya (Brassica juncea) against downy mildew pathogen. Protein content in plants ranged between 43.5 to 57.7 mg/g fresh weight compared to 37.2 mg/g fresh weight in control. Induction of proteins and defense related enzymes was systemic in nature. The SAR compounds also surged the levels of defense related proteins, i.e. Polyphenol oxidase (PPO), Phenylalanine ammonia lyase (PAL) and pathogenesis related Pr- proteins i.e. ?-1,3 glucanase, Peroxidase (POD),  from 21 to 130 per cent indicating induction of resistance. Protein profiling of treated Brassica plants was also done electrophoreticaly, which further confirmed the induction of pathogenesis-related proteins ranging from 15- 75 kDa along with some other proteins. Salicylic acid @ 500µM showed best results with 71.27 per cent disease control followed by Jasmonic acid with 69.6 per cent; whereas both, Bion and ?eta amino butyric acid gave almost 63 per cent disease control as compared to control plants. Integration of disease tolerance in Brassica varieties/genotypes combined with prophylactic spray of salicylic acid proved to be very economical for managing downy mildew disease.

scholarly journals Candidate genes in coffee (Coffea arabica L.) leaves associated with rust (Hemileia vastatrix Berk. & Br) stress

2019 ◽  
Author(s):  
Fabián Echeverría-Beirute ◽  
Seth C. Murray ◽  
Benoit Bertrand ◽  
Patricia E. Klein
Keyword(s):  
Gene Expression ◽  
Coffea Arabica ◽  
Systemic Acquired Resistance ◽  
Acquired Resistance ◽  
Hemileia Vastatrix ◽  
Fruit Thinning ◽  
Expression Of Genes ◽  
Coffee Leaf Rust ◽  
Host Tolerance ◽  
Related Proteins

Background. Coffee leaf rust (CLR) caused by Hemileia vastatrix Berk. & Br, is one of the most threatening diseases for Coffea arabica L. It is hypothesized that host tolerance to CLR relies on non-race-specific resistance genes. Methods. This study evaluated gene expression in leaves of two susceptible coffee cultivars (one inbred and one F1 hybrid) under different stress conditions: rust control (fungicide and untreated) and fruit thinning (thinned and un-thinned) treatments. RNA-seq analysis focused on the association of differentially expressed genes (DEGs) with CLR and associated the effect of the most significant genes into the phenotype, using regression and prediction statistical models. Results. Gene expression and gene ontology (GO) analysis allowed identification of 100 genes associated with quantitative traits. From these, 88 were correlated with rust incidence, rust severity, and rust sporulation. The expression of genes coding for pathogenesis-related proteins increased positively with rust incidence in the inbred, while genes involved in homoeostasis and broader cell wall structuring processes were upregulated in the F1 hybrid. The enriched gene functions and associations revealed that a possible hypersensitive response (HR) in the inbred and a systemic acquired resistance (SAR) in the F1 hybrid were involved in the tolerance mechanisms to CLR stress. This is the first study to demonstrate the specific interactions between CLR and host at a molecular level, useful for identifying control targets for breeding perennial species.

scholarly journals Candidate genes in coffee (Coffea arabica L.) leaves associated with rust (Hemileia vastatrix Berk. & Br) stress

2019 ◽  
Author(s):  
Fabián Echeverría-Beirute ◽  
Seth C. Murray ◽  
Benoit Bertrand ◽  
Patricia E. Klein
Keyword(s):  
Gene Expression ◽  
Coffea Arabica ◽  
Systemic Acquired Resistance ◽  
Acquired Resistance ◽  
Hemileia Vastatrix ◽  
Fruit Thinning ◽  
Expression Of Genes ◽  
Coffee Leaf Rust ◽  
Host Tolerance ◽  
Related Proteins

Background. Coffee leaf rust (CLR) caused by Hemileia vastatrix Berk. & Br, is one of the most threatening diseases for Coffea arabica L. It is hypothesized that host tolerance to CLR relies on non-race-specific resistance genes. Methods. This study evaluated gene expression in leaves of two susceptible coffee cultivars (one inbred and one F1 hybrid) under different stress conditions: rust control (fungicide and untreated) and fruit thinning (thinned and un-thinned) treatments. RNA-seq analysis focused on the association of differentially expressed genes (DEGs) with CLR and associated the effect of the most significant genes into the phenotype, using regression and prediction statistical models. Results. Gene expression and gene ontology (GO) analysis allowed identification of 100 genes associated with quantitative traits. From these, 88 were correlated with rust incidence, rust severity, and rust sporulation. The expression of genes coding for pathogenesis-related proteins increased positively with rust incidence in the inbred, while genes involved in homoeostasis and broader cell wall structuring processes were upregulated in the F1 hybrid. The enriched gene functions and associations revealed that a possible hypersensitive response (HR) in the inbred and a systemic acquired resistance (SAR) in the F1 hybrid were involved in the tolerance mechanisms to CLR stress. This is the first study to demonstrate the specific interactions between CLR and host at a molecular level, useful for identifying control targets for breeding perennial species.

Mechanizmy obronne roślin drzewiastych uruchamiane w odpowiedzi na atak patogenów

2018 ◽  
Vol XI ◽  
pp. 21-30
Author(s):  
Emilia Wilmowicz ◽  
Agata Kućko ◽  
Jan Kopcewicz
Keyword(s):  
Induced Resistance ◽  
Systemic Acquired Resistance ◽  
Acquired Resistance ◽  
Natural Resistance ◽  
Tree Protection ◽  
Pathogenesis Related ◽  
Different Types ◽  
Protection Strategies ◽  
Related Proteins ◽  
Comprehensive Study

This paper presents a comprehensive study on the mechanisms of tree responses to pathogens. We describe natural resistance concerning the presence of different types of barriers protecting plants from invasion and also give them strength after a pathogen attack. We put emphasis on induced resistance functioning both locally and systemically and involvement of phytohormones signaling networks. Systemic acquired resistance (SAR) involved the action of salicylic acid and H202 and accumulation of pathogenesis-related proteins. In turn, jasmonates and ethylene are signaling molecules in the induced resistance (SIR). All these substances play a crucial role in the forest management and can be applied in the tree protection strategies based on the natural and synthetic active compounds.

scholarly journals The estimation of organic acids effectiveness as biotic elicitors via changes of endogenous peroxid content

2020 ◽  
Vol 26 ◽  
pp. 202-206
Author(s):  
I. V. Zhuk ◽  
A. P. Dmitriev ◽  
Ju. V. Shylina ◽  
G.M. Lysova ◽  
L. O. Kucherova
Keyword(s):  
Hydrogen Peroxide ◽  
Winter Wheat ◽  
Plant Disease Resistance ◽  
Systemic Acquired Resistance ◽  
Induced Defense ◽  
Acquired Resistance ◽  
Triticum Aestivum L ◽  
Defense Responses ◽  
Septoria Tritici ◽  
Signal Molecule

Aim. The usage of biotic elicitors for elicitation of defense responses may induce plant disease resistance and prevent increased environmental pollution by pesticides. Hydrogen peroxide is a well-known signal molecule for photosynthetic status and for stomatal movements, and systemic acquired resistance to pathogens in plants proposed to be dependent on H2O2. The aim of research was to analyze in field trials the effect of oxalic, ferulic and kojic acid on H2O2 content and winter wheat resistance against Septoria tritici. Methods. Content of endogenous H2O2 was measured in elicitor treated and inoculated by S. tritici wheat plants (cv. Oberig) during different ontogenesis phases. The extent of disease development, morphometric parameters and yield structure were analyzed. Results. It is shown that the lowest level of hydrogen peroxide in leaves at the necrotrophic stage of pathogen infection was after oxalic acid treatment, and the highest – after koijc acid influence. Conclusions. The data obtained suggest that elicitors induced defense responses in winter wheat against S. tritici and hydrogen peroxide content is an important and valuable parameter. Keywords: biotic elicitors, hydrogen peroxide, induced resistance, Triticum aestivum L., Septoria tritici Rob et Desm.

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