Similar Datasets
Project description:<p>Grape juice is a major source of potential health-promoting bioactive polyphenols, especially for children and those who do not consume wine. Since the subtropical climate may negatively affect the concentrations of grape polyphenols, especially anthocyanins, elicitors such as methyl jasmonate (MeJa) could be used to promote polyphenol biosynthesis. This work aimed at investigating the impact of MeJa treatment on grape juice produced <em>via</em> a traditional low-cost process from two <em>Vitis labrusca</em> cultivars and in two Brazilian regions. The untargeted LC-MS analytical protocol demonstrated that Isabel Precoce juices strongly benefited from MeJa treatment, especially regarding their anthocyanic profile, regardless of the cultivation region. Known MeJa markers in wine and <em>V. vinifera</em> grapes (flavanols, flavonols and stilbenes) in this experiment had mixed behaviours depending on the region/variety/cultivation. Moreover, it was found that all the detected hydroxycinnamates were influenced by the treatment, especially the concentration of their glucosides, which was increased. Glutathione, 2-S-glutathionyl caftaric acid and indole lactic acid glucoside were identified for the first time as MeJa treatment biomarkers in grape products, indicating a possible positive effect on juice antioxidant properties.</p>
2022-06-28 | MTBLS2401 | MetaboLights
Project description:<p>Vitis labrusca L. grapes are largely cultivated in Brazil, but the tropical climate affect negatively the phenols content, especially anthocyanin. Therefore, researches are focusing on increase grape phenols content; with methyl jasmonate application (MeJa) considered a good alternative. </p><p>The aim was to investigate with an untargeted approach the metabolic changes caused by the MeJa pre-harvest application on two Vitis labrusca L. cultivars grape, both grown in two Brazilian regions. Isabel Precoce and Concord grapes cultivated under subtropical climate, on south and southeast of Brazil, received MeJa pre-harvest treatment. Grape metabolome was extracted and analyzed with a MS based metabolomics protocol by UPLC-HRMS-QTOF. Unsupervised data analysis reveal clear separation between the two regions and the two cultivars, while supervised data analysis revealed biomarkers between MeJa and control group. Between the biomarkers, stilbenes, hydrocinnamates, flavonols and anthocyanins were identified. These results suggest that MeJa can be used as elicitor to secondary metabolism in grapes grown even under subtropical climate, affecting phenolic biosynthesis.</p>
2020-05-26 | MTBLS784 | MetaboLights
Project description:Jasmonic acid (JA) and methyl jasmonate (MeJA) regulate plant development, resistance to stress, and insect attack by inducing specific gene expression. However, little is known about the mechanism of plant defense against herbivore attack at a protein level. Using a high-resolution 2-DE gel, we identified 60 MeJA-responsive proteins and measured protein expression level changes. Among these 62 proteins, 43 proteins levels were increased while 11 proteins were decreased. We also found eight proteins uniquely expressed in response to MeJA treatment. The proteins identified in this study have important biological functions including photosynthesis and energy related proteins (38.4%), protein folding, degradation and regulated proteins (15.0%), stress and defense regulated proteins (11.7%), and redox-responsive proteins (8.3%). We found MeJA could not only induce plant defense mechanisms to insects, it also enhanced toxic protein production that potentially can be used for bio-control of Asian corn borer.
2015-03-25 | PXD001793 | Pride
Project description:Stresses from either biotic or abiotic origins can have significant impact towards plant physiology and molecular regulation. Jasmonate acid (JA) and its derivative, methyl JA (MeJA) are hormonal cues released by plants which signal defensive response to curb the damage from such stresses. In an attempt to study the defensive response, a tropical herbal plant, Persicaria minor (P. minor) which is known for its pungent smell as well as various bioactivities including antimicrobial and anti-cancer, has been treated with MeJA to invoke the stress signaling. Such elicitation has been performed in various plants such as Arabidopsis, rice and hairy root cultures of certain herbs, yet how MeJA directly influenced the proteome of a herbal species particularly P. minor has not been previously elucidated. In this study, P. minor plants was exogenously treated with MeJA and its proteome was investigated using a new proteomics approach called SWATH-MS.
2018-06-25 | PXD005749 | Pride
Project description:In previous work, cephalotaxine, harringtonine, homoharringtonine were shown to be accumulated differentially after various stimuli. Especially, after MeJA treatment, the concentration of 3 cephalotaxus alkaloids all showed decreasing. We speculated that the genes expressed lower after MeJA treatment might encode some enzymes responsible for the biosynthesis of cephalotaxus alkaloids. Therefore, choosing the sample treated with MeJA and the control sample for comparative iTRAQ analysis will greatly facilitate dissection of the genes involved in the biosynthesis of cephalotaxus alkaloids and even the acyl portions of cephalotaxus ester alkaloids. This approach is widely used for mining and identifying novel genes in the biosynthesis of secondary metabolites without genome data in plants.
2022-02-21 | PXD031354 | Pride
Project description:Calli generated from grape berries were used to establish a cell suspension in Gamborgs B5 liquid medium with minimal organics supplemented with 30 gL-1 sucrose, 0.25 gL-1 casein hydrolysate, 0.93 ?M kinetin and 0.54 ?M naphthaleneacetic acid (NAA) and incubated in darkness at 26°C. <br>The cells were cultured in 250 mL flasks (50 mL of cell suspension in each) incubated in darkness on an orbital shaker at 100 rpm. The cell suspensions were sub-cultured every 2 weeks using an initial packed cell volume (PCV) of 15%. For the evaluation of the effect of elicitor addition on the changes in gene expression, 100 mL flasks containing 20 mL of the above cell suspension were used. Each treatment was conducted in triplicate.<br><br>In a set of preliminary experiments studying the effect of elicitors on the volatiles produced by the cell suspensions, the compounds were added during the exponential growth phase when the PCV was approximately 50%. After 72h incubation in darkness after elicitor addiction, cells were harvested. The elicitors screened for their ability to induce volatile compound production were: 500 µM methyl jasmonate (MeJA); 500 uM MeJA + 500 µM salicylic acid (SA); 500 µM jasmonic acid (JA). Controls were conducted by adding the same volume of the solvent used to dissolve each elicitor to the cultures. For the jasmonate and SA experiments the solvent was ethanol.<br>
2009-04-28 | E-MEXP-1524 | biostudies-arrayexpress
Project description:We reported the application of high-throughput sequencing technology (RNA-seq) for the transcriptome of T. chinensis cells and the transcriptional alternatives of that responded to MeJA were comprehensively and quantitatively assessed with high-throughput sequencing technology (RNA-seq). By sequencing > 29 million reads (200 bp in length) of cDNA from each of MeJA-treated T. chinensis cells at 16 h (T16) and the control (T0), we identified 46,581 transcripts and uncovered 13,469 genes differentially expressed in response to MeJA. We provided functional clues for understanding the regulation mechanisms of MeJA-mediated defense responses and taxol biosynthesis.
2012-11-16 | GSE28539 | GEO
Project description:Licorice (Glycyrrhiza uralensis Fisch) flavonoids have many pharmacological effects, as the main chemical component of licorice, its content directly affects the quality of licorice. Methyl jasmine (MeJA) is an important signaling molecule in the secondary metabolic pathway of plants, but the biological mechanisms that stimulating the production of licorice flavonoids and the related changes in transcriptome are still less studied. In this research, the expression of two key enzyme genes: Chalcone synthase (CHS) and Cinnamate 4-hydroxylase (C4H) in the biosynthesis pathway of licorice flavonoids was determined, and it was significantly different after 9 hours of MeJA induction. The transcriptome profiles of licorice cells at 9 hours after MeJA treatment were analyzed to investigate the transcriptional alterations of licorice cell in response to MeJA elicitation by “RNA-seq”. 151, 529 transcripts (200 bp in length) of cDNA from the samples were generated, and 116, 907 unigenes were found. MeJA appeared to stimulate a large number of genes involved in several relevant functional categories, such as carbohydrate metabolism and encoding transcription factors, 11 MYB transcription factors expressed significant differences were screened. This comprehensive description of gene expression information could help elucidate the molecular mechanism of MeJA-mediated biosynthesis of licorice flavonoids and MeJA-regulated network formation.
2019-08-01 | GSE128503 | GEO
Project description:Using this microarray data, we identified 19898 probes (717 upregulated and 1512 downregulated in the mock- and MeJA-treated leaf samples at ‘1wk’ and ‘2wk’ stages; 17669 with differential expression in these samples), compared with the mock-treated sample at ‘0wk’ stage. This work aims to identify the genes related to MeJA-induced senescence of tobacco whole-plant, and found several genes differentially expressed between the mock- and MeJA-treated samples at the same stage.
2022-05-31 | GSE182794 | GEO