scholarly journals Comparison of polyamine metabolism in tomato plants exposed to different concentrations of salicylic acid under light or dark conditions

2016 ◽  
Vol 108 ◽  
pp. 266-278 ◽  
Author(s):  
Zoltán Takács ◽  
Péter Poór ◽  
Irma Tari
2008 ◽  
Vol 43 (8) ◽  
pp. 1017-1023 ◽  
Author(s):  
Daniel Oliveira Jordão do Amaral ◽  
Marleide Magalhães de Andrade Lima ◽  
Luciane Vilela Resende ◽  
Márcia Vanusa da Silva

The objective of this work was to determine the transcript profile of tomato plants (Lycopersicon esculentum Mill.), during Fusarium oxysporum f. sp. lycopersici infection and after foliar application of salicylic acid. The suppression subtractive hybridization (SSH) technique was used to generate a cDNA library enriched for transcripts differentially expressed. A total of 307 clones was identified in two subtractive libraries, which allowed the isolation of several defense-related genes that play roles in different mechanisms of plant resistance to phytopathogens. Genes with unknown roles were also isolated from the two libraries, which indicates the possibility of identifying new genes not yet reported in studies of stress/defense response. The SSH technique is effective for identification of resistance genes activated by salicylic acid and F. oxysporum f. sp. lycopersici infection. Not only the application of this technique enables a cost effective isolation of differentially expressed sequences, but also it allows the identification of novel sequences in tomato from a relative small number of sequences.


2010 ◽  
Vol 54 (4) ◽  
pp. 677-683 ◽  
Author(s):  
I. Tari ◽  
G. Kiss ◽  
A. K. Deer ◽  
J. Csiszar ◽  
L. Erdei ◽  
...  

1971 ◽  
Vol 49 (12) ◽  
pp. 2097-2100 ◽  
Author(s):  
J. Méndez ◽  
Stewart A. Brown

Vanillic and salicylic acids, and the coumarins marmesin, herniarin, esculetin, and bergapten were identified as constituents of whole tomato plants by paper and thin-layer chromatography and ultraviolet spectroscopy in the presence of diagnostic reagents. Strong evidence for the occurrence of p-hydroxybenzoic, syringic, ferulic, and p-hydroxycinnamic acids was obtained on the basis of chromatographic data and chromogenic reactions. Only the last two compounds and salicylic acid had been reported to occur in tomato plants. Biosynthetic implications of the occurrence of these phenolics are considered.


2016 ◽  
Vol 93 ◽  
pp. 1-11 ◽  
Author(s):  
Ana Isabel Cueto-Ginzo ◽  
Luis Serrano ◽  
Richard M. Bostock ◽  
Juan Pedro Ferrio ◽  
Ricardo Rodríguez ◽  
...  

2020 ◽  
Vol 38 (3) ◽  
pp. 288-294
Author(s):  
Paulo Sérgio Pulga ◽  
Juliane Maciel Henshel ◽  
Juliano Tadeu Vilela de Resende ◽  
André Ricardo Zeist ◽  
Aline Fabiana Paladini Moreira ◽  
...  

ABSTRACT This study was performed to evaluate the effect of exogenous application of salicylic acid as a resistance inducer to two-spotted spider mite and tomato pinworm on tomato genotypes. Bioassays were carried out in three commercial genotypes (‘Redenção’, ‘Giuliana’, and ‘Alambra’) and one wild genotype (Solanum habrochaites var. hirsutum, accession PI-127826). Average distance travelled by the two-spotted spider mite and number of eggs deposited over the leaflets of the genotypes were investigated. Concerning pinworm bioassay, number of eggs, leafminers on leaflet surface and percentage of leaf area consumed by leafminers were evaluated using a scanner. Furthermore, severity of attack to plants was evaluated by score scale for damages, types of lesions and attacked leaflets. Salicylic acid application induced resistance in the commercial genotypes against both pests, reducing the two-spotted spider mite and pinworm oviposition. The spider mites travelled shorter distance on leaflets of genotypes treated with salicylic acid at intermediate concentrations, indicating a positive effect of substance as inducing resistance. Attack severity by pinworm was also reduced when intermediate doses of salicylic acid were applied. Also, higher resistance was observed on accession PI-127826 as compared to other genotypes. The obtained results indicate that the resistance of PI-127826 was due to constitutive defense, whereas on commercial genotypes defense was dependent on responses mediated by salicylic acid. Hence, salicylic acid treatment, as resistance inducer, seems to be efficient against two-spotted spider mite and pinworm, being a promising tool within an integrated pest management on tomato plants.


Plants ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 136 ◽  
Author(s):  
Loredana Scalschi ◽  
Eugenio Llorens ◽  
Pilar García-Agustín ◽  
Begonya Vicedo

The jasmonic acid pathway has been considered as the backbone of the response against necrotrophic pathogens. However, a hemi-biotrophic pathogen, such as Pseudomonas syringae, has taken advantage of the crosstalk between the different plant hormones in order to manipulate the responses for its own interest. Despite that, the way in which Pseudomonas syringae releases coronatine to activate jasmonic acid-derived responses and block the activation of salicylic acid-mediated responses is widely known. However, the implication of the jasmonic intermediates in the plant-Pseudomonas interaction is not studied yet. In this work, we analyzed the response of both, plant and bacteria using SiOPR3 tomato plants. Interestingly, SiOPR3 plants are more resistant to infection with Pseudomonas. The gene expression of bacteria showed that, in SiOPR3 plants, the activation of pathogenicity is repressed in comparison to wild type plants, suggesting that the jasmonic acid pathway might play a role in the pathogenicity of the bacteria. Moreover, treatments with JA restore the susceptibility as well as activate the expression of bacterial pathogenicity genes. The observed results suggest that a complete jasmonic acid pathway is necessary for the susceptibility of tomato plants to Pseudomonas syringae.


2015 ◽  
Vol 105 (4) ◽  
pp. 412-418 ◽  
Author(s):  
Rajalingam Nagendran ◽  
Yong Hoon Lee

Light influences many physiological processes in most organisms. To investigate the influence of light on plant and pathogen interaction, we challenged tomato seedlings with Pseudomonas cichorii JBC1 by flood inoculation and incubated the seedlings under different light conditions. Tomato seedlings exposed to green or red light showed a significant reduction in disease incidence compared with those grown under white light or dark conditions. To understand the underlying mechanisms, we investigated the effects of each light wavelength on P. cichorii JBC1 and tomato plants. Treatment with various light wavelengths at 120 µmol m–2s–1 revealed no significant difference in growth, swarming motility, or biofilm formation of the pathogen. In addition, when we vacuum-infiltrated P. cichorii JBC1 into tomato plants, green and red light also suppressed disease incidence which indicated that the reduced disease severity was not from direct influence of light on the pathogen. Significant upregulation of the defense-related genes, phenylalanine ammonia-lyase (PAL) and pathogenesis-related protein 1a (PR-1a) was observed in P. cichorii JBC1-infected tomato seedlings grown under green or red light compared with seedlings grown under white light or dark conditions. The results of this study indicate that light conditions can influence plant defense mechanisms. In particular, green and red light increase the resistance of tomato plants to infection by P. cichorii.


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