Defense-related hormone signaling coordinately controls the role of melatonin during Arabidopsis thaliana-Pseudomonas syringae interaction

Liu, Qiuping; Atta, Ur Rehman; Wang, Renfen; Liu, Kexin; Ma, Xinbin; Weng, Qingbei

doi:10.1007/s10658-021-02279-8

Cited by 14 publications

(8 citation statements)

References 39 publications

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“…Exogenous melatonin alleviates photosynthetic inhibition and oxidative damage [ 25 , 26 , 27 ], and regulates carbon assimilation, hence improving drought tolerance [ 28 , 29 , 30 ]. This process is involved in the signaling pathways of abscisic acid (ABA) and salicylic acid [ 31 , 32 ]. Previous studies illuminated that melatonin has direct effects on microbiota in animal guts and soil [ 33 , 34 ].…”

Section: Introductionmentioning

confidence: 99%

Exogenous Melatonin Reprograms the Rhizosphere Microbial Community to Modulate the Responses of Barley to Drought Stress

Jiang

Zhang

et al. 2022

IJMS

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The rhizospheric melatonin application-induced drought tolerance has been illuminated in various plant species, while the roles of the rhizosphere microbial community in this process are still unclear. Here, the diversity and functions of the rhizosphere microbial community and related physiological parameters were tested in barley under the rhizospheric melatonin application and drought. Exogenous melatonin improved plant performance under drought via increasing the activities of non-structural carbohydrate metabolism enzymes and activating the antioxidant enzyme systems in barley roots under drought. The 16S/ITS rRNA gene sequencing revealed that drought and melatonin altered the compositions of the microbiome. Exogenous melatonin increased the relative abundance of the bacterial community in carbohydrate and carboxylate degradation, while decreasing the relative abundance in the pathways of fatty acid and lipid degradation and inorganic nutrient metabolism under drought. These results suggest that the effects of melatonin on rhizosphere microbes and nutrient condition need to be considered in its application for crop drought-resistant cultivation.

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Section: Introductionmentioning

confidence: 99%

Exogenous Melatonin Reprograms the Rhizosphere Microbial Community to Modulate the Responses of Barley to Drought Stress

Jiang

Zhang

et al. 2022

IJMS

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“…54,55 For example, melatonin not only promotes resistance to the virulent bacterium Pseudomonas syringae in the JAinsensitive mutants, but also downregulates the expression of an ABA biosynthetic gene with upregulation of its catabolic genes in drought-prone plants. 56,57 Besides, exogenous melatonin was found to improve the expression of heat-shock factors (HSFA1s), the key regulators of thermal responses, where the ABA signaling pathway functions to promote the expression of HSFA1s. 53,58 Here, we found that tomato plants at eCO 2 not only accumulated an increased level of melatonin but also accumulated a higher level of JA.…”

Section: Discussionmentioning

confidence: 99%

“…Most often, hormones and signaling molecules crosstalk synergistically or antagonistically to fine‐tune plant growth and adaptation to various environmental stimuli 54,55 . For example, melatonin not only promotes resistance to the virulent bacterium Pseudomonas syringae in the JA‐insensitive mutants, but also downregulates the expression of an ABA biosynthetic gene with upregulation of its catabolic genes in drought‐prone plants 56,57 . Besides, exogenous melatonin was found to improve the expression of heat‐shock factors ( HSFA1s ), the key regulators of thermal responses, where the ABA signaling pathway functions to promote the expression of HSFA1s 53,58 .…”

Section: Discussionmentioning

confidence: 99%

Melatonin mediates elevated carbon dioxide‐induced photosynthesis and thermotolerance in tomato

Hasan

Xing

Zhou

et al. 2023

Journal of Pineal Research

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Increasing carbon dioxide (CO2) promotes photosynthesis and mitigates heat stress‐induced deleterious effects on plants, but the regulatory mechanisms remain largely unknown. Here, we found that tomato (Solanum lycopersicum L.) plants treated with high atmospheric CO2 concentrations (600, 800, and 1000 µmol mol−1) accumulated increased levels of melatonin (N‐acetyl‐5‐methoxy tryptamine) in their leaves and this response is conserved across many plant species, including Arabidopsis, rice, wheat, mustard, cucumber, watermelon, melon, and hot pepper. Elevated CO2 (eCO2; 800 µmol mol−1) caused a 6.8‐fold increase in leaf melatonin content, and eCO2‐induced melatonin biosynthesis preferentially occurred through chloroplast biosynthetic pathways in tomato plants. Crucially, manipulation of endogenous melatonin levels by genetic means affected the eCO2‐induced accumulation of sugar and starch in tomato leaves. Furthermore, net photosynthetic rate, maximum photochemical efficiency of photosystem II, and transcript levels of chloroplast‐ and nuclear‐encoded photosynthetic genes, such as rbcL, rbcS, rbcA, psaD, petB, and atpA, significantly increased in COMT1 overexpressing (COMT1‐OE) tomato plants, but not in melatonin‐deficient comt1 mutants at eCO2 conditions. While eCO2 enhanced plant tolerance to heat stress (42°C) in wild‐type and COMT1‐OE, melatonin deficiency compromised eCO2‐induced thermotolerance in comt1 plants. The expression of heat shock proteins genes increased in COMT1‐OE but not in comt1 plants in response to eCO2 under heat stress. Further analysis revealed that eCO2‐induced thermotolerance was closely linked to the melatonin‐dependent regulation of reactive oxygen species, redox homeostasis, cellular protein protection, and phytohormone metabolism. This study unveiled a crucial mechanism of elevated CO2‐induced thermotolerance in which melatonin acts as an essential endogenous signaling molecule in tomato plants.

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“…More and more evidence demonstrate that multiple hormones are involved in plant and pathogen interactions ( Denance et al., 2013 ; Li et al., 2019a ; Liu et al., 2021 ). In our study, results showed that genes involved in SA signaling pathway, such as SA receptor NPR1 , transcription factor TGA and PR1 , were all upregulated.…”

Section: Discussionmentioning

confidence: 99%

“…Plant hormones play key regulation roles not only in plant growth and development processes but also in plant responses to a wide range of biotic and abiotic stresses ( Benoit and Patrick, 2016 ). More and more evidence has demonstrated that multiple hormones have been involved in plant and pathogen interactions ( Denance et al., 2013 ; Li et al., 2019a ; Liu et al., 2021 ). In general, salicylic acid (SA) signaling regulates plant defense against biotrophic pathogens, while the jasmonic acid (JA)/ethylene (ET) pathway normally defends against necrotrophic pathogens and herbivorous insects ( Jane, 2005 ; Bari and Jones Jonathan, 2009 ).…”

Section: Introductionmentioning

confidence: 99%

Physiological and transcriptome profiling revealed defense networks during Cladosporium fulvum and tomato interaction at the early stage

Peng

Sun

et al. 2022

Front. Plant Sci.

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Tomato leaf mold caused by Cladosporium fulvum (C. fulvum) is a serious fungal disease which results in huge yield losses in tomato cultivation worldwide. In our study, we discovered that ROS (reactive oxygen species) burst was triggered by C. fulvum treatment in tomato leaves. RNA-sequencing was used to identify differentially expressed genes (DEGs) induced by C. fulvum inoculation at the early stage of invasion in susceptible tomato plants. Gene ontology (GO) terms and Kyoto Encyclopedia of Genes and Genomes (KEGG) databases were used to annotate functions of DEGs in tomato plants. Based on our comparative analysis, DEGs related to plant-pathogen interaction pathway, plant hormone signal transduction pathway and the plant phenylpropanoid pathway were further analyzed. Our results discovered that a number of core defense genes against fungal invasion were induced and plant hormone signal transduction pathways were impacted by C. fulvum inoculation. Further, our results showed that SA (salicylic acid) and ABA (abscisic acid) contents were accumulated while JA (jasmonic acid) content decreased after C. fulvum inoculation in comparison with control, and quantitative real-time PCR to detect the relative expression of genes involved in SA, ABA and JA signaling pathway further confirmed our results. Together, results will contribute to understanding the mechanisms of C. fulvum and tomato interaction in future.

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Defense-related hormone signaling coordinately controls the role of melatonin during Arabidopsis thaliana-Pseudomonas syringae interaction

Cited by 14 publications

References 39 publications

Exogenous Melatonin Reprograms the Rhizosphere Microbial Community to Modulate the Responses of Barley to Drought Stress

Exogenous Melatonin Reprograms the Rhizosphere Microbial Community to Modulate the Responses of Barley to Drought Stress

Melatonin mediates elevated carbon dioxide‐induced photosynthesis and thermotolerance in tomato

Physiological and transcriptome profiling revealed defense networks during Cladosporium fulvum and tomato interaction at the early stage

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