Methyl Jasmonate-Induced Changes of Flavor Profiles During the Processing of Green, Oolong, and Black Tea

Shi, Jiang; Xie, Dongchao; Qi, Dandan; Peng, Qunhua; Chen, Zongmao; Schreiner, Monika; Zhi, Lin; Baldermann, Susanne

doi:10.3389/fpls.2019.00781

Cited by 36 publications

(23 citation statements)

References 52 publications

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“…According to our previous results, the application of MeJA to fresh tea leaves significantly enhanced the aroma quality of prepared teas 26 . Previously, we conducted combined transcriptomic and volatile metabolite analyses and partially elucidated physiological changes at the molecular level 27 .…”

Section: Introductionsupporting

confidence: 53%

“…This phenomenon is caused by the induction of key LOX enzymes due to MeJA priming mimicking herbivorous insects 1 and is commonly activated by jasmonate-dependent defense mechanisms. This timely response triggers the formation of fatty acid-derived volatiles in fresh tea leaves, which are eventually stored as glycosides and in turn improve the sensory properties of tea products 26 . Hence, MeJA priming could be used to activate defense mechanisms and reduce the amount of pesticide used during tea farming.…”

Section: Discussionmentioning

confidence: 99%

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Integrated proteomic and metabolomic analyses reveal the importance of aroma precursor accumulation and storage in methyl jasmonate-primed tea leaves

Shi

Wang

et al. 2021

Hortic Res

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In response to preharvest priming with exogenous methyl jasmonate (MeJA), tea plants adjust their physiological behavior at the molecular level. The whole-organism reconfiguration of aroma formation from the precursor to storage is poorly understood. In this study, we performed iTRAQ proteomic analysis and identified 337, 246, and 413 differentially expressed proteins in tea leaves primed with MeJA for 12 h, 24 h, and 48 h, respectively. Furthermore, a total of 266 nonvolatile and 100 volatile differential metabolites were identified by utilizing MS-based metabolomics. A novel approach that incorporated the integration of extended self-organizing map-based dimensionality was applied. The vivid time-scale changes tracing physiological responses in MeJA-primed tea leaves are marked in these maps. Jasmonates responded quickly to the activation of the jasmonic acid pathway in tea leaves, while hydroxyl and glycosyl jasmonates were biosynthesized simultaneously on a massive scale to compensate for the exhausted defense. The levels of α-linolenic acid, geranyl diphosphate, farnesyl diphosphate, geranylgeranyl diphosphate, and phenylalanine, which are crucial aroma precursors, were found to be significantly changed in MeJA-primed tea leaves. Green leaf volatiles, volatile terpenoids, and volatile phenylpropanoids/benzenoids were spontaneously biosynthesized from responding precursors and subsequently converted to their corresponding glycosidic forms, which can be stably stored in tea leaves. This study elucidated the physiological response of tea leaves primed with exogenous methyl jasmonate and revealed the molecular basis of source and sink changes on tea aroma biosynthesis and catabolism in response to exogenous stimuli. The results significantly enhance our comprehensive understanding of tea plant responses to exogenous treatment and will lead to the development of promising biotechnologies to improve fresh tea leaf quality.

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Section: Introductionsupporting

confidence: 53%

Section: Discussionmentioning

confidence: 99%

Integrated proteomic and metabolomic analyses reveal the importance of aroma precursor accumulation and storage in methyl jasmonate-primed tea leaves

Shi

Wang

et al. 2021

Hortic Res

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“…To a large extent, aroma determines the price of tea products. Exogenous jasmonic acid spraying can effectively increase the alcohol and hexenyl ester contents in oolong tea and thus improve the tea quality 24 . In this study, we identified 13 CsJAZ genes based on the tea plant draft genome sequence (Table 1).…”

Section: Discussionmentioning

confidence: 99%

Genome-wide and expression pattern analysis of JAZ family involved in stress responses and postharvest processing treatments in Camellia sinensis

Chen

Wang

Sun

et al. 2020

Sci Rep

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the JASMONATE-ZIM DOMAIN (JAZ) family genes are key repressors in the jasmonic acid signal transduction pathway. Recently, the JAZ gene family has been systematically characterized in many plants. However, this gene family has not been explored in the tea plant. In this study, 13 CsJAZ genes were identified in the tea plant genome. Phylogenetic analysis showed that the JAZ proteins from tea and other plants clustered into 11 sub-groups. The CsJAZ gene transcriptional regulatory network predictive and expression pattern analyses suggest that these genes play vital roles in abiotic stress responses, phytohormone crosstalk and growth and development of the tea plant. in addition, the CsJAZ gene expression profiles were associated with tea postharvest processing. Our work provides a comprehensive understanding of the CsJAZ family and will help elucidate their contributions to tea quality during tea postharvest processing.Higher plants face a large number of severe challenges during their life cycles, including insect bites, pathogen infection, heavy metal stress, and water scarcity. However, as sessile organisms, plants have evolved sophisticated mechanisms to resist these problems and clever strategies to thrive in their ever-changing natural environments 1,2 . For plants, phytohormones are the most effective and fastest weapon in response to environmental stress. For example, jasmonic acid (JA) is widely known to play an important role in various biological processes in plants, including defense against herbivorous insect attack, flower initiation and plant morphogenesis [3][4][5] .There are at least two jasmonate synthesis pathways that exist in plants, namely octadecane pathway and hexadecanoid pathway, which begins with the release of α-linolenic acid (18:3n-3) and hexadecatrienoic acid (16:3n-3), respectively 6 . The unsaturated fatty acids are catalyzed by a series of enzymes then generates 12-oxo-10,15 (Z)-phytodienoic acid (OPDA), in the chloroplast 7 . Finally, JA is formed through OPDA reductase 3 (OPR3)-mediated reduction reaction and three rounds of β-oxidation 6 . Interestingly, an alternative pathway for JA biosynthesis was discovered. OPDA could enter the β-oxidation pathway to produce a direct precursor of JA and JA-lie in the absence of OPR3 8 . Moreover, the JA signal pathway has been deciphered 9,10 . It has been reported that the JA receptor is a co-receptor complex formed by JAZ protein, COI1 (CORONATINE INSENSITIVE1) protein and inositol pentakisphosphate 11 . Previous studies have revealed that the JA content is maintained at a relatively low level in plants under normal conditions, in which the JAZ repressor interacts with MYC2 to inhibit downstream insect-resistant or disease-resistant gene expression 12 . However, large amounts of JA accumulate in plant cells in response to abiotic or biotic stresses and are perceived by COI1 13,14 . Subsequently, JAZ proteins are degraded by COI1-mediated E3 ubiquitination. Then, the transcription activator MYC is relieved, which increases the expression o...

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“…The substantial enhancement in carbohydrate levels might also be due to the activation of photosynthetic machinery of stressed plants. In a recent study, researchers found that the application of methyl jasmonate improved the contents of different carbohydrate metabolites such as benzyl alcohol, phenyalacetaldehyde, benzaldehyde, 2-phenylethyl alcohol, and trans-2-hexanal in tea plants ( Camellia sinensis ) [285]. Ahmadi et al [286] found that exogenously applied methyl jasmonate under salt stress modulated the salinity induced peroxidation through increased levels of soluble sugar in Brassica napus leaves.…”

Section: Role Of Jasmonates In Regulation Of Osmolytes Under Abiotmentioning

confidence: 99%

Phytohormones Regulate Accumulation of Osmolytes Under Abiotic Stress

et al. 2019

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Plants face a variety of abiotic stresses, which generate reactive oxygen species (ROS), and ultimately obstruct normal growth and development of plants. To prevent cellular damage caused by oxidative stress, plants accumulate certain compatible solutes known as osmolytes to safeguard the cellular machinery. The most common osmolytes that play crucial role in osmoregulation are proline, glycine-betaine, polyamines, and sugars. These compounds stabilize the osmotic differences between surroundings of cell and the cytosol. Besides, they also protect the plant cells from oxidative stress by inhibiting the production of harmful ROS like hydroxyl ions, superoxide ions, hydrogen peroxide, and other free radicals. The accumulation of osmolytes is further modulated by phytohormones like abscisic acid, brassinosteroids, cytokinins, ethylene, jasmonates, and salicylic acid. It is thus important to understand the mechanisms regulating the phytohormone-mediated accumulation of osmolytes in plants during abiotic stresses. In this review, we have discussed the underlying mechanisms of phytohormone-regulated osmolyte accumulation along with their various functions in plants under stress conditions.

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Methyl Jasmonate-Induced Changes of Flavor Profiles During the Processing of Green, Oolong, and Black Tea

Cited by 36 publications

References 52 publications

Integrated proteomic and metabolomic analyses reveal the importance of aroma precursor accumulation and storage in methyl jasmonate-primed tea leaves

Integrated proteomic and metabolomic analyses reveal the importance of aroma precursor accumulation and storage in methyl jasmonate-primed tea leaves

Genome-wide and expression pattern analysis of JAZ family involved in stress responses and postharvest processing treatments in Camellia sinensis

Phytohormones Regulate Accumulation of Osmolytes Under Abiotic Stress

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