Identification of defence metabolites in tomato plants infected by the bacterial pathogen Pseudomonas syringae

López-Gresa, María Pilar; Torres, Cristina; Campos, Laura; Lisón, Purificación; Rodrigo, Ismael; Bellés, José M.; Conejero, Vicente

doi:10.1016/j.envexpbot.2011.06.003

Cited by 96 publications

(74 citation statements)

References 62 publications

(69 reference statements)

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“…2). Infections caused by A. alternata have been shown to increase the content of phenolic acids in tomatoes (López-Gresa et al 2011;Wojciechowska et al 2014). Plants rapidly accumulate phenolic compounds in response to a pathogenic infection (Gogoi et al 2001).…”

Section: Severity Of Late Blight and Early Blightmentioning

confidence: 99%

The Effect of Growth Regulators and a Biostimulator on the Health Status, Yield and Yield Components of Potatoes (Solanum tuberosum L.)

2017

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In this study, the influence of potato cultivars Irga, Satina, Valfi, Blaue St. Galler and Highland Burgundy Red (HB Red), growth regulators: Bio-Algeen S-90, Kelpak SL and Trifender WP, and the biostimulator Asahi SL on the health status of potato plants and tuber yield was investigated. The severity of late blight and early blight was estimated during the growing season. After harvest, potato tuber yield was determined according to size fractions. The applied treatments significantly reduced the severity of late blight in cv. Irga (Kelpak SL), Valfi (Bio-Algeen S-90, Kelpak SL, Trifender WP) and Blaue St. Galler (Trifender WP) in 2013. In 2015, the symptoms of early blight were significantly reduced in cv. Irga after the application of all tested bioregulators. HB Red was characterized by the best health status among the evaluated cultivars. Kelpak SL and BioAlgeen S-90 increased the tuber yield of cvs. Irga and HB Red, respectively, in 2013, and Trifender WP increased the tuber yield of cv. Satina in 2014. In the first year of the study, the applied growth regulators and biostimulator significantly increased the percentage of medium-sized tubers of cv. Blaue St. Galler, and Bio-Algeen S-90 increased the percentage of medium-sized tubers of cv. HB Red.

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Section: Severity Of Late Blight and Early Blightmentioning

confidence: 99%

The Effect of Growth Regulators and a Biostimulator on the Health Status, Yield and Yield Components of Potatoes (Solanum tuberosum L.)

2017

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“…Citrus plants (12 months old, about 1 m height) were kept in temperature-controlled greenhouse (28)(29)(30)(31)(32) C) and were watered twice a week and fertilized once a week using 20-10-20 fertilizer (Allentown, PA). The thirteen different citrus varieties that were used in this study are shown in Table 1.…”

Section: Plantsmentioning

confidence: 99%

Amino acids implicated in plantdefenseare higher inCandidatusLiberibacter asiaticus-tolerant citrus varieties

Killiny

Hijaz

2016

Plant Signaling & Behavior

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Citrus Huanglongbing (HLB), also known as citrus greening, has been threatening the citrus industry since the early 1900's and up to this date there are no effective cures for this disease. Field observations and greenhouse controlled studies demonstrated that some citrus genotypes are more tolerant to Candidatus Liberibacter asiaticus (CLas) pathogen than others. However, the mechanisms underpinning tolerance has not been determined yet. The phloem sap composition of CLas-tolerant and sensitive citrus varieties was studied to identify metabolites that could be responsible for their tolerance to CLas. The citrus phloem sap was collected by centrifugation and was analyzed with gas chromatography-mass spectrometry after methyl chloroformate derivatization. Thirty-three metabolites were detected in the phloem sap of the studied varieties: twenty 20 amino acids, eight 8 organic acids, and five 5 fatty acids. Interestingly, the levels of most amino acids, especially those implicated in plantdefense to pathogens such as phenylalanine, tyrosine, tryptophan, lysine, and asparagine were higher in tolerant varieties. Although the level of organic acids varied between cultivars, this variation was not correlated with citrus resistance to CLas and could be cultivar specific. The fatty acids were found in trace amounts and in most cases their levels were not significantly different among varieties. Better understanding of the mechanisms underpinning citrus tolerance to CLas will help in developing economically tolerant varieties.

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“…Traditionally, the analytical techniques employed in the search for these metabolites were basically chromatographic, coupled to spectroscopic detectors or mass spectrometers (Baumert et al, 2001;Shadle et al, 2003;Tan et al, 2004) . Accordingly, the range of metabolites that can be identified using 85 these techniques is restricted based on the case specific experimental procedures employed and the physical-chemical properties of the compounds investigated (Roepenack-Lahaye et al, 2003;Bednarek et al, 2005;Fayos et al, 2006;Zacarés et al, 2007;Bellés et al, 2008;López-Gresa et al, 2011). However, a considerable amount of biomolecules with different biological functions (and physical-chemical 90 properties), are proposed to be involved in the physiology of plant/pathogen interactions.…”

Section: Introductionmentioning

confidence: 99%

Metabolic fingerprinting of Tomato Mosaic Virus infected Solanum lycopersicum

López-Gresa

Lisón

Kim

et al. 2012

Journal of Plant Physiology

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general time-dependent decrease in organic acids, amino acids (excluding asparagine), phenylpropanoids and rutin was observed in individual leaves. In addition, metabolite alterations were also found to correlate with the developmental stage of the leaf: high levels of organic acids, some amino acids, phenylpropanoids, and flavonoids were found in lower leaves while elevated amounts of sugars were present in the upper ones. 35Moreover, a marked variation in the content of some metabolites was also observed to be associated to the asymptomatic ToMV infection both in inoculated and systemically infected leaves. While flavonoids accumulated in virus-inoculated leaves, increased levels of phenylpropanoids were observed in non-inoculated leaves where ToMV actively replicates. Finally, diurnal changes in the metabolite content were also 40 observed: an increase of amino acids and organic acids (except glutamic acid) were observed in the samples collected in the morning, whereas sugars and secondary metabolite levels increased in the tomato leaves harvested in the evening.

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Identification of defence metabolites in tomato plants infected by the bacterial pathogen Pseudomonas syringae

Cited by 96 publications

References 62 publications

The Effect of Growth Regulators and a Biostimulator on the Health Status, Yield and Yield Components of Potatoes (Solanum tuberosum L.)

The Effect of Growth Regulators and a Biostimulator on the Health Status, Yield and Yield Components of Potatoes (Solanum tuberosum L.)

Amino acids implicated in plantdefenseare higher inCandidatusLiberibacter asiaticus-tolerant citrus varieties

Metabolic fingerprinting of Tomato Mosaic Virus infected Solanum lycopersicum

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