Methyl Jasmonate: An Alternative for Improving the Quality and Health Properties of Fresh Fruits

The infection of the model legume Medicago truncatula with Ralstonia solanacearum GMI1000 gives rise to bacterial wilt disease via colonisation of roots. The root and leaf responses to early infection (1 and 3 days post infection) were characterised to investigate the molecular mechanisms of plant resistance or susceptibility. A proteomics approach based on pools of susceptible and resistant recombinant inbred lines was used to specifically target the mechanisms for tolerance. Differential abundances were evidenced for proteins involved in defence (e.g., PR5, PR10, or Kunitz protease inhibitors) and signalling pathways (such as cyclophilin). R. solanacearum inoculation modifies expression levels of those genes, either in both genotypes (AOS1, LOX4, and proteinase inhibitors) or specifically in the resistant line (PR proteins). Exogenous application of salicylic acid (SA) enhanced tolerance to the bacteria, whereas methyl jasmonate (MeJA) enhanced short-term tolerance then promoted disease in the susceptible ecotype, suggesting that they may mediate defence responses. Conversely, proteomics-identified genes were also shown to be SA or MeJA responsive. This is the first description of differential response to R. solanacearum in M. truncatula. Our results suggest that root basal defence is activated at 1 dpi, together with the JA pathway. Specific resistance is then evidenced at three dpi, with the up-regulation of SA-dependent PR proteins.

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“…This kind effect of MeJA was reported by other researchers (Maciejewska & Kopcewicz, 2002;Reyes-Díaz et al, 2016).…”

Section: R Solanacearum Inoculation Modifies Expression Levels Of supporting

confidence: 84%

Proteomics analysis ofMedicago truncatularesponse to infection by the phytopathogenic bacteriumRalstonia solanacearumpoints to jasmonate and salicylate defence pathways

Yamchi

Ben

Rossignol

et al. 2018

Cellular Microbiology

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“…4,30 Thus, the effect of MeJA treatment on an increasing phenolic concentration in juice and flavedo of lemon fruit would lead to an enhanced antioxidant potential and health-beneficial effects. 18 Indeed, MeJA treatment of blackberry plants increased the effect of fruit extracts with respect to inhibiting cancer cell proliferation and inducing apoptosis in human lung cancer cells, 36 which was correlated with an increased phenolic concentration. In lemon fruit, a previous study has reported the effect of postharvest 10 μmol L -1 MeJA treatment on an increasing phenolic concentration in flavedo during storage as a result of an increase in PAL activity.…”

Section: Discussionmentioning

confidence: 98%

“…These phenolic compounds, together with ascorbic acid, are mainly responsible for the antioxidant properties attributed to lemon fruit, which not only depend on the concentration of each individual compound, but also on the interactions among them . Thus, the effect of MeJA treatment on an increasing phenolic concentration in juice and flavedo of lemon fruit would lead to an enhanced antioxidant potential and health‐beneficial effects . Indeed, MeJA treatment of blackberry plants increased the effect of fruit extracts with respect to inhibiting cancer cell proliferation and inducing apoptosis in human lung cancer cells, which was correlated with an increased phenolic concentration.…”

Section: Discussionmentioning

confidence: 99%

“…7 Thus, MeJA treatment during on-plant fruit development increased phenolics and anthocyanins in plums, 11 sweet cherry, 12 black currants, 13 raspsberries, 14 apples, 15 grapewine 16 and globe artichoke 17 as a result of enhanced phenylalanine ammonialyase (PAL) activity, leading to improved quality and health properties with respect to fresh fruit and vegetable consumption. 18 Specifically, in lemon fruit, a recent study reported the effect of postharvest MeJA treatment with respect to increasing phenolic content in flavedo, which was related to increased chilling injury tolerance during cold storage. 19 On the other hand, postharvest MeJA treatment has been also effective with respect to increasing activity of antioxidant enzymes, such as superoxide dismutase (SOD), catalase (CAT), peroxidase (POD) and ascorbate peroxidase (APX), in loquat, 20 peach, 21 raspberry, 22 eggplants 23 and tomato, 24 as well as pre-harvest treatments in plum.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, MeJA applied as post‐ or pre‐harvest treatment has been shown to have positive effects on increasing fruit bioactive compounds with antioxidant potential, as well as health beneficial effects . Thus, MeJA treatment during on‐plant fruit development increased phenolics and anthocyanins in plums, sweet cherry, black currants, raspsberries, apples, grapewine and globe artichoke as a result of enhanced phenylalanine ammonialyase (PAL) activity, leading to improved quality and health properties with respect to fresh fruit and vegetable consumption . Specifically, in lemon fruit, a recent study reported the effect of postharvest MeJA treatment with respect to increasing phenolic content in flavedo, which was related to increased chilling injury tolerance during cold storage …”

Section: Introductionmentioning

confidence: 99%

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Pre‐harvest methyl jasmonate treatments increase antioxidant systems in lemon fruit without affecting yield or other fruit quality parameters

et al. 2019

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BACKGROUND Jasmonic acid (JA) and its volatile derivative methyl jasmonate (MeJA) are hormones involved in the regulation of many processes in plants and act (when applied as a post‐ or pre‐harvest treatment) to increase fruit bioactive compounds with antioxidant potential. However, there is no literature available regarding the effect of pre‐harvest MeJA treatment on lemon fruit antioxidant systems, which was the aim of the present study. RESULTS MeJA treatment (0.1, 0.5 and 1.0 mmol L–1) increased antioxidant compounds, such as phenolics, in the juice and flavedo of ‘Fino’ and ‘Verna’ lemons at harvest, with the most effective concentration being 0.1 mmol L–1 in both cultivars. In addition, catalase (CAT), peroxidase (POD) and ascorbate peroxidase (APX) activities were also increased by MeJA treatment, with the highest increases being also found with 0.1 mmol L–1. The increases in APX and CAT were maintained from one treatment to another during fruit development on the tree, whereas the increase on POD disappeared after 8–10 days of each treatment. For both antioxidant systems, the highest increases were found in lemon harvested at the commercial ripening stage. By contrast, crop yield, fruit ripening process and quality parameters were generally not affected by MeJA treatment. CONCLUSION Preharvest MeJA treatment could be a useful tool for increasing antioxidant potential and the health beneficial effects of lemon fruit consumption, given the relationship between these properties and phenolic content. Moreover, the increased concentration of phenolics and the activity of antioxidant enzymes in the flavedo of MeJA treated fruit could increase lemon tolerance to chilling injury and decay during postharvest storage. © 2019 Society of Chemical Industry

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An Update on Core Jasmonate Signalling Networks, Physiological Scenarios, and Health Applications

Pérez‐Salamó

Krasauskas

Gates

et al. 2019

Annual Plant Reviews Online

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Jasmonic acid, its precursors in the biosynthetic pathway and derivatives are lipid‐derived signalling molecules. Together with other plant hormones, they regulate responses to stress (biotic and abiotic), mediate defence (against pathogens and herbivores), and a plethora of processes including growth and reproductive development in different plant species. The discovery of jasmonates is more recent than that of auxin, abscisic acid, cytokinins, gibberellic acid, ethylene, and salicylic acid; however, their role in regulating plant developmental plasticity is second to none. Since the 1990s, research made substantial advances and added to the crosstalk with the abovementioned other hormones and signalling pathways. Building on the knowledge of over two decades, an update on the research in JAs signalling components regulating plant responses to developmental and environmental cues is provided here. Information in Arabidopsis thaliana is integrated with reports on other plants. Recent findings in the regulation of plant responses to biotics and abiotic stressors and evidence implicating JAs in the regulation of the trade‐off between growth and stress will be reported. Health applications for JAs and JAs‐induced secondary metabolism, bridging the gap between biotechnology and traditional medicine, will illustrate the practical and societal relevance of investigating the functions of such compounds.

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Methyl Jasmonate: An Alternative for Improving the Quality and Health Properties of Fresh Fruits

Cited by 121 publications

References 111 publications

Proteomics analysis ofMedicago truncatularesponse to infection by the phytopathogenic bacteriumRalstonia solanacearumpoints to jasmonate and salicylate defence pathways

Proteomics analysis ofMedicago truncatularesponse to infection by the phytopathogenic bacteriumRalstonia solanacearumpoints to jasmonate and salicylate defence pathways

Pre‐harvest methyl jasmonate treatments increase antioxidant systems in lemon fruit without affecting yield or other fruit quality parameters

An Update on Core Jasmonate Signalling Networks, Physiological Scenarios, and Health Applications

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