Role of serotonin in plant stress responses: Quo vadis?

Journal of Integrative Plant Biology, Journal Year: 2025, Volume and Issue: unknown

Published: March 18, 2025

ABSTRACT Serotonin (5‐hydroxytryptamine (5‐HT)) is a pineal hormone and secondary metabolite related to various hormonal physiological functions at the organ, tissue, cellular levels. It considered increasingly important in regulating animal behavior, but function of serotonin plants far less known. According recent research, vital for plant growth, development, stress responses, achieved through transcriptional phytohormonal interplay. Specifically, this review addresses critical gaps understanding serotonin's by examining its biosynthesis, metabolism, multifaceted role mitigating both abiotic stresses (salinity, drought, heat, cold, heavy metals) as well biotic challenges (pathogens, pests, herbivores). As pivotal player, it engages variety significant molecular interactions, including those with reactive oxygen nitrogen species (RONS), phytohormones such auxin, abscisic acid (ABA), salicylic (SA), jasmonic (JA), ethylene (ET), cytokinin (CK). Advances serotonin‐related research are anticipated offer valuable basis uncovering regulatory pathways which impacts resilience crops against stress.

Language: Английский

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Growing vegetables in a warming world - a review of crop response to drought stress, and strategies to mitigate adverse effects in vegetable production

Frontiers in Plant Science, Journal Year: 2025, Volume and Issue: 16

Published: April 4, 2025

Drought stress caused by climate change is increasingly affecting the productivity and quality of vegetable crops worldwide. This review comprehensively analyzes physiological, biochemical, molecular mechanisms that employ to cope with drought stress. In particular, it highlights significance key hormonal regulation pathways, such as abscisic acid (ABA), jasmonic (JA), ethylene (ET), which play crucial roles in mediating responses. Additionally, role antioxidant defense systems mitigating oxidative damage reactive oxygen species (ROS) discussed. Advances agricultural technologies, use smart irrigation biostimulants, have shown promising results enhancing resistance optimizing crop yields. Integrating these strategies development resistant varieties through gene editing traditional breeding techniques will ensure sustainable production stressed environments. aims support future research into enhance tolerance secure global food supply.

Language: Английский

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Hydrogen peroxide mediates melatonin-induced chilling tolerance in cucumber seedlings

Plant Cell Reports, Journal Year: 2024, Volume and Issue: 43(12)

Published: Nov. 13, 2024

Language: Английский

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SlTDC modulates photosynthesis of senescent leaves in tomato

Horticulture Advances, Journal Year: 2024, Volume and Issue: 2(1)

Published: July 10, 2024

Abstract Melatonin (MT) is a key regulator in plants’ response to leaf senescence induced by aging or various abiotic stresses. Here, we demonstrated that darkness and enhance endogenous MT levels upregulating genes involved synthesis. Additionally, exogenous application significantly mitigated tomato plants, leading higher chlorophyll content maximum photochemical efficiency (Fv/Fm) compared the control. Using Solanum lycopersicum L. tryptophan decarboxylase ( SlTDC )-overexpressed -knockout transgenic seedlings, found overexpression increased suppressed mRNA of degradation-related genes: pheophorbide oxygenase PAO ), pheophytinase PPH non-yellow coloring1 like NOL ). Furthermore, alleviated photosystem II complex (PSII) photoinhibition, ribulose-1,5-bisphosphate carboxylase (Rubisco) Rubisco activase (RCA) activities levels, maintained photosynthetic leaves under aged over 35 d wild-type plants. Conversely, knockout accelerated darkness- aging-induced tomatoes. Our findings suggest can effectively alleviate regulating photosynthesis

Language: Английский

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Melatonin Enhances Heat Tolerance via Increasing Antioxidant Enzyme Activities and Osmotic Regulatory Substances by Upregulating zmeno1 Expression in Maize (Zea mays L.)

Antioxidants, Journal Year: 2024, Volume and Issue: 13(9), P. 1144 - 1144

Published: Sept. 22, 2024

Heat stress severely affects the yield and quality of maize. Melatonin (N-acetyl-5-methoxy-tryptamin, MT) plays an important role in various types resistance plants, including heat tolerance. Enolase (ENO, 2-phospho-D-glycerate hydrolyase) contributes to plant growth, development, response. As now, molecular mechanisms by which MT ENO1 affect tolerance are unknown. In our research, we have revealed that (H) + (MH) treatment upregulate ZmENO1 expression levels 15 20 times, respectively. overexpression mutant maize lines were created transgenic genome editing. These results illustrate has a significant impact on growth at seedling stage. However, ZmENO1-OE showed lower degree susceptibility stress, whereas exhibited most severe effects. Under exogenous application improves The best highest survival rate, while zmeno1 mutants least desirable results. Following with H MH, level greatest increase reached maximum value, was lowest. decreased maize’s relative water content fresh weight, although had led MDA, hydrogen peroxide, superoxide all plants. Additionally, ionic permeability osmotic potential plants significantly increased. decrease observed lines. Interestingly, MT. stress-induced upregulation ZmSOD, ZmPOD, ZmAPX, ZmCAT, ZmP5CS, ZmProDH levels, lowest following spraying. patterns SOD, POD, APX, CAT enzyme activity, as well proline soluble protein content, aligned variations these genes. Our findings indicate can gene. Upregulating gene resulted elevated ZmProDH. This increased activity antioxidant enzymes higher osmoregulatory substances. Consequently, it mitigated cell membrane damage caused ultimately improved this study provide genetic resources for design breeding lay solid foundation further exploring mechanism regulation

Language: Английский

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Auxin as a downstream signal positively participates in melatonin‐mediated chilling tolerance of cucumber

Physiologia Plantarum, Journal Year: 2024, Volume and Issue: 176(5)

Published: Sept. 1, 2024

Abstract Here, we elucidate the interaction between IAA and melatonin (MT) in response to chilling cucumber. The results showed that stress induced increase of endogenous MT IAA, application promoted synthesis while could not affect content under stress. Moreover, both remarkably increased tolerance cucumber seedlings terms lower contents MDA ROS, higher mRNA abundance cold genes, net photosynthetic rate ( P n ), maximum regeneration ribulose‐1,5‐diphosphate (J max Rubisco carboxylation efficiency (V cmax activities gene expression RCA Rubisco, as well active P700 (I/I 0 ) electron transport, compared with plants H 2 O treatment. Further analysis revealed inhibition transportation significantly reduced by MT, whereas did IAA. Meanwhile, found overexpression biosynthesis CsASMT tolerance, which was blocked silence CsYUCCA10 decreased cucumber, be alleviated MT. These data implied acted a downstream signal participate MT‐induced seedlings. study has implications for production greenhouse winter seasons.

Language: Английский

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Hydrogen peroxide mediates melatonin-induced chilling tolerance in cucumber seedlings

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 4, 2024

Melatonin (MT) and hydrogen peroxide (H₂O₂) are important endogenous signaling molecules that play multifaceted roles in plant responses to abiotic stress. However, the interactive mechanism by which MT H₂O₂ regulate chilling tolerance remains unclear. Here we found exhibited a positive regulatory effect on of cucumbers, with an optimum concentration 100 µM. markedly enhanced RBOH1 mRNA expression, activity accumulation cucumber seedlings. 1.0 mM had no significant levels TDC ASMT, key genes for synthesis, content. Both significantly decreased malondialdehyde (MDA), electrolyte leakage (EL) injury index (CI) activating antioxidant system, thereby alleviating damage improved photosynthetic carbon assimilation, was primarily attributed increase activity, protein RuBPCase RCA. Meanwhile, induced photoprotection both PSII PSI enhancing QA’s electron transport capacity elevating photosystems. Moreover, upregulated expression cold response genes. MT-induced attenuated by N’, N’-dimethylthiourea (DMTU), H₂O₂ specific scavenger. Whereas, synthesis inhibitor (p-chlorophenylalanine, p-CPA) did not influence H₂O₂-induced tolerance. The regulation photosynthesis gene were RBOH1-RNAi plants compared WT plants. These findings suggest may functions as downstream molecule

Language: Английский

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Light-chilling stress causes hyper-accumulation of iron in shoot, exacerbating leaf oxidative damage in cucumber

Plant and Cell Physiology, Journal Year: 2024, Volume and Issue: 65(11), P. 1873 - 1887

Published: Sept. 27, 2024

Iron availability within the root system of plants fluctuates depending on various soil factors, which directly impacts plant growth. Simultaneously, environmental stressors, such as high/low temperatures and high light intensity, affect photosynthesis in leaves. However, combined effects iron nutrient conditions abiotic stresses have not yet been clarified. In this study, we analyzed how nutrition impact chilling-induced damage cucumber leaves (Cucumis sativus L.). When cucumbers were grown under different then exposed to chilling stress, a condition exhibited more severe than control plants. Conversely, low-iron showed an alleviation damages. These differences observed light-dependent manner, indicating that intensified toxicity reactive oxygen species generated by photosynthetic electron transport. fact, less accumulation malondialdehyde derived from lipid peroxidation after stress. Notably, displayed significant increase shoot, specifically light-chilling but dark-chilling This indicated increased root-to-shoot translocation, driven low temperature, exacerbated leaf oxidative during findings also highlight importance managing face stress will facilitate crop breeding cultivation strategies.

Language: Английский

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The role of TOR in response to chilling stress in the Solanum lycopersicum L

Plant Growth Regulation, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 10, 2024

Language: Английский

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