Priming in plant–pathogen interactions

Conrath, Uwe; Pieterse, Corné M. J.; Mauch‐Mani, Brigitte

doi:10.1016/s1360-1385(02)02244-6

Cited by 859 publications

(592 citation statements)

References 72 publications

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“…Some quemical inducers are 2,6-dichloro isonicotinic acid (INA), benzo-(1,2,3)-thiadiazole-7-carbotionic acid S-methyl ester (BTH), β-aminobutyric acid (BABA) (Oostendorp et al, 2001;Conrath et al, 2002) and hexanoic acid, which by root treatment protects tomato plants and Arabidopsis against Botrytis cinerea (Vicedo et al, 2009;Kravchuk et al, 2011). Regarding abitotic stress, BABA has been shown to confer plant protection against salinity and drought (Jakab et al, 2005;Macarisin et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Ammonium enhances resistance to salinity stress in citrus plants

Fernández-Crespo

Camañes

García‐Agustín

2012

Journal of Plant Physiology

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In this work, we demonstrate that NH 4 + nutrition in citrange Carrizo plants acts as an inducer of resistance against salinity conditions. We investigated its mode of action and provide evidence that NH 4 + confers resistance by priming abscisic acid and polyamines, just as enhancing H 2 O 2 and proline basal content. Moreover it observed a diminished Cl -uptake as well as an enhanced PHGPx expression after salt stress. Control and N-NH 4 + plants have shown optimal growth, however it was observed that N-NH 4 + plants have displayed greater dry weight and total lateral roots than control plants, but that differences are not seen for primary roots length. Our results reveal that N-NH 4 + treatment induces a similar phenotypical response to the recent stress-induced morphogenetic response (SIMRs). The hypothesis is that N-NH 4 + treatment triggers mild chronic stress in citrange Carrizo plants, which might explain the SIMR observed. Moreover, we observed modulators of stress signaling, such as H 2 O 2 in N-NH 4 + plants, which could acts as an intermediary between stress and the development of the SIMR phenotype. This observation suggests that NH 4 + treatments induce a mild stress condition that primes the citrange Carrizo defense response by stress imprinting and confers protection against a subsequent salt stress.

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Section: Introductionmentioning

confidence: 99%

Ammonium enhances resistance to salinity stress in citrus plants

Fernández-Crespo

Camañes

García‐Agustín

2012

Journal of Plant Physiology

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“…The majority of the identified potentiated genes was predicted to be regulated by JA and/or ET signaling. Priming is a process that provides the plant with an enhanced capacity for rapid and effective activation of cellular defense responses that are induced only after contact with a pathogen (Conrath et al, 2002). It allows the plant to react more effectively to the invader encountered, which might explain the broad-spectrum action of induced resistance.…”

Section: Introductionmentioning

confidence: 99%

Colonization of the Arabidopsis rhizosphere by fluorescent Pseudomonas spp. activates a root-specific, ethylene-responsive PR-5 gene in the vascular bundle

et al. 2005

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Plants of which the roots are colonized by selected strains of non-pathogenic, fluorescent Pseudomonas spp. develop an enhanced defensive capacity against a broad spectrum of foliar pathogens. In Arabidopsis thaliana, this rhizobacteria-induced systemic resistance (ISR) functions independently of salicylic acid but requires responsiveness to jasmonic acid and ethylene. In contrast to pathogen-induced systemic acquired resistance (SAR), ISR is not associated with systemic changes in the expression of genes encoding pathogenesis-related (PR) proteins. To identify genes that are specifically expressed in response to colonization of the roots by ISRinducing Pseudomonas fluorescens WCS417r bacteria, we screened a collection of Arabidopsis enhancer trap and gene trap lines containing a transposable element of the Ac/Ds system and the GUS reporter gene. We identified an enhancer trap line (WET121) that specifically showed GUS activity in the root vascular bundle upon colonization of the roots by WCS417r. Fluorescent Pseudomonas spp. strains P. fluorescens WCS374r and P. putida WCS358r triggered a similar expression pattern, whereas ISR-non-inducing Escherichia coli bacteria did not. Exogenous application of the ethylene precursor 1-aminocyclopropane-1-carboxylate (ACC) mimicked the rhizobacteria-induced GUS expression pattern in the root vascular bundle, whereas methyl jasmonic acid and salicylic acid did not, indicating that the Ds element in WET121 is inserted in the vicinity of an ethylene-responsive gene. Analysis of the expression of the genes in the close vicinity of the Ds element revealed AtTLP1 as the gene responsible for the in cis activation of the GUS reporter gene in the root vascular bundle. AtTLP1 encodes a thaumatin-like protein that belongs to the PR-5 family of PR proteins, some of which possess antimicrobial properties. AtTLP1 knockout mutant plants showed normal levels of WCS417r-mediated ISR against the bacterial leaf pathogen Pseudomonas syringae pv. tomato DC3000, suggesting that expression of AtTLP1 in the roots is not required for systemic expression of ISR in the leaves. Together, these results indicate that induction of AtTLP1 is a local response of Arabidopsis roots to colonization by non-pathogenic fluorescent Pseudomonas spp. and is unlikely to play a role in systemic resistance.

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“…There are numerous reports on how the fungal species respond differently to environmental variations, especially temperature and humidity. However, host susceptibility to fungal disease is directly influenced by temperature, humidity and osmotic stress (Conrath et al 2002). Consequently, Fusarium spp.…”

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confidence: 99%

Correlation between black point symptoms and fungal infestation and seedling viability of wheat kernels

Hudec¹,

Muchová²

2008

Plant Prot. Sci.

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Hudec K., Muchová D. (2008): Correlation between black point symptoms and fungal infestation and seedling viability of wheat kernels. Plant Protect. Sci., 44: 138-146.The level of occurrence of black point, the spectrum of fungal species and damage to wheat seedling vigour associated with it were assessed during 2003 and 2004 in the Slovak Republic. The incidence of black point kernels ranged between 0.2-2.4% in 2003 and 24.2-34.3% in 2004. The kernels' fungal contamination varied from 60% to 100%. Alternaria spp., F. poae and F. culmorum were isolated from all localities and all subsamples. Stemphylium vesicarium, Fusarium culmorum, F. graminearum, F. avenaceum, F. sporotrichioides, Microdochium nivale, Epicoccum nigrum, Penicillium spp., Aspergillus niger, Rhizopus nigricans and Cochliobolus sativus were isolated less frequently. Fungi of the genus Alternaria were the most dominant, followed by Fusarium and Microdochium among which F. poae was dominant. Irrespective of incubation temperature, the germinative capacity and coleoptile growth rate of discolored kernels were affected more in the wet and cold year 2004. The inhibition of germination and seedling viability was more pronounced at the incubation temperature 22°C than at 15°C. Inhibition of coleoptile growth rate was 0.12-3.12% in black point kernels collected in 2003, and 0.24-9.28% in those collected in 2004.

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Priming in plant–pathogen interactions

Cited by 859 publications

References 72 publications

Ammonium enhances resistance to salinity stress in citrus plants

Ammonium enhances resistance to salinity stress in citrus plants

Colonization of the Arabidopsis rhizosphere by fluorescent Pseudomonas spp. activates a root-specific, ethylene-responsive PR-5 gene in the vascular bundle

Correlation between black point symptoms and fungal infestation and seedling viability of wheat kernels

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