Role of Jasmonic Acid Pathway in Tomato Plant-Pseudomonas syringae Interaction

Scalschi, Loredana; Llorens, Eugenio; García‐Agustín, Pilar; Vicedo, Begonya

doi:10.3390/plants9020136

Cited by 19 publications

(8 citation statements)

References 45 publications

(64 reference statements)

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“…These authors studied the behavior of SiOPR3 transgenic plants (plants whose Opr3 gene has been silenced, disrupting the JA synthesis pathway at the OPDA level) on PstDC3000 infection at normal temperatures. They demonstrated that the reduction in the severity of bacterial disease was accompanied by an enhancement of OPDA levels, as well as reduced levels of JA and JA-Ile [55]. This proves the importance of this oxylipin in the response of tomato plants to Pseudomonas and confirmed our results, as we observed a synergic activation of the SA and JA pathways with an increase in PR1 expression and OPDA accumulation in T26 • C plants.…”

Section: Discussionsupporting

confidence: 90%

Response of Tomato-Pseudomonas Pathosystem to Mild Heat Stress

et al. 2022

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Higher plants suffer from mild heat stress when temperatures increase by 5 °C above optimum growth temperatures. This produces changes at the cellular and metabolic levels, allowing plants to adapt to heat conditions. This study investigated an increase of 5 °C above the optimum growth temperature (26 °C) of tomato plants in the tomato–Pseudomonas syringae pv. tomato pathosystem. A temperature increase above 26 °C affects plant development, the defensive pathways activated against Pseudomonas syringae pv. tomato strain DC3000 (PstDC3000), and the bacterial growth and virulence machinery. The results demonstrated that tomato plants were able to acclimate to mild heat stress, showing no symptoms of damage. Moreover, plants subjected to a 5 °C increase (T31 °C plants) showed higher basal levels of metabolites such as proline and putrescine, which probably act as compatible osmolytes. This demonstrates their importance as key components of thermotolerance. When grown under mild heat stress, plants were less susceptible to PstDC3000 and showed increased accumulation of abscisic acid, jasmonic acid-isoleucine, and spermine. In addition, the temperature increase negatively affected the infectivity of PstDC3000. Inhibition of the genes responsible for quorum sensing establishment and synthesis of flagellin and coronatine was observed in bacteria extracted from T31 °C plants. Analysis of the genes involved in the synthesis of the type III secretion system indicates the important role of this system in bacterial growth under these conditions. As the known resistance mechanisms involved in the defense against PstDC3000 were not activated, the changes in its virulence mechanisms under high temperatures may explain the lower infection observed in the T31 °C plants.

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Section: Discussionsupporting

confidence: 90%

Response of Tomato-Pseudomonas Pathosystem to Mild Heat Stress

et al. 2022

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“…However, it is important to mention that different fine-tuned hormonal regulations could be observed depending on the pathogens’ lifestyle [ 33 , 34 ]. In contrast with fungi, the repression of JA and the activation of SA promoted the immune response in the R genotype to R. solanacerarum , confirming previous findings [ 35 , 36 ]. Differences in hormone regulation may also induce plants’ anti-herbivore characteristics [ 37 ].…”

Section: Discussionsupporting

confidence: 90%

Comparison of Tomato Transcriptomic Profiles Reveals Overlapping Patterns in Abiotic and Biotic Stress Responses

Amoroso

D’Esposito

Cigliano

et al. 2023

IJMS

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Until a few years ago, many studies focused on the transcriptomic response to single stresses. However, tomato cultivations are often constrained by a wide range of biotic and abiotic stress that can occur singularly or in combination, and several genes can be involved in the defensive mechanism response. Therefore, we analyzed and compared the transcriptomic responses of resistant and susceptible genotypes to seven biotic stresses (Cladosporium fulvum, Phytophthora infestans, Pseudomonas syringae, Ralstonia solanacearum, Sclerotinia sclerotiorum, Tomato spotted wilt virus (TSWV) and Tuta absoluta) and five abiotic stresses (drought, salinity, low temperatures, and oxidative stress) to identify genes involved in response to multiple stressors. With this approach, we found genes encoding for TFs, phytohormones, or participating in signaling and cell wall metabolic processes, participating in defense against various biotic and abiotic stress. Moreover, a total of 1474 DEGs were commonly found between biotic and abiotic stress. Among these, 67 DEGs were involved in response to at least four different stresses. In particular, we found RLKs, MAPKs, Fasciclin-like arabinogalactans (FLAs), glycosyltransferases, genes involved in the auxin, ET, and JA pathways, MYBs, bZIPs, WRKYs and ERFs genes. Detected genes responsive to multiple stress might be further investigated with biotechnological approaches to effectively improve plant tolerance in the field.

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“…In concrete, the amount of this compound was significantly higher in young infected leaves of young plants than in all other samples (p < 0.01, Table 2). This observation is similar to that of Scalschi et al, who found increased amounts of salicylic acid in tomato 48 h after infection with P. syringae [28].…”

Section: Concentrations Of Selected Phenolic Acidssupporting

confidence: 92%

Production of Defense Phenolics in Tomato Leaves of Different Age

et al. 2020

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Phenolics play an essential role in the defense reaction of crop plants against pathogens. However, the intensity of their production induced by infection may differ during the life of a plant. Here, we identified age-related differences in phenolic biosynthesis in the pathosystem Solanum lycopersicum cv. Amateur and Pseudomonas syringae pv. tomato DC3000. We analyzed concentrations of total phenolics, phenolic profiles, and concentrations of selected phenolic acids. The influence of bacterial infection, together with leaf and plant age, was assessed. The changes in concentrations of caffeic acid, 4-hydroxybenzoic acid, and salicylic acid glucoside caused by infection were found to be influenced by age. In concrete, the increases in the concentrations of these metabolites were all evident only in young plants.

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Role of Jasmonic Acid Pathway in Tomato Plant-Pseudomonas syringae Interaction

Cited by 19 publications

References 45 publications

Response of Tomato-Pseudomonas Pathosystem to Mild Heat Stress

Response of Tomato-Pseudomonas Pathosystem to Mild Heat Stress

Comparison of Tomato Transcriptomic Profiles Reveals Overlapping Patterns in Abiotic and Biotic Stress Responses

Production of Defense Phenolics in Tomato Leaves of Different Age

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