Melatonin enhances cotton immunity to Verticillium wilt via manipulating lignin and gossypol biosynthesis

The Plant Journal, Journal Year: 2019, Volume and Issue: 100(4), P. 784 - 800

Published: July 26, 2019

Plants endure challenging environments in which they are constantly threatened by diverse pathogens. The soil-borne fungus Verticillium dahliae is a devastating pathogen affecting many plant species including cotton, it significantly reduces crop yield and fiber quality. Melatonin involvement immunity to pathogens has been reported, but the mechanisms of melatonin-induced resistance unclear. In this study, role melatonin enhancing cotton V. was investigated. At transcriptome level, exogenous increased expression genes phenylpropanoid, mevalonate (MVA), gossypol pathways after inoculation. As result, lignin gossypol, products these metabolic pathways, increased. Silencing serotonin N-acetyltransferase 1 (GhSNAT1) caffeic acid O-methyltransferase (GhCOMT) biosynthesis compromised resistance, with reduced levels Exogenous pre-treatment prior inoculation restored level above gene silencing effects. were higher resistant cultivars than susceptible findings indicate that affects synthesis MVA, thereby dahliae.

Language: Английский

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Melatonin delays leaf senescence of Chinese flowering cabbage by suppressing ABFs‐mediated abscisic acid biosynthesis and chlorophyll degradation

Journal of Pineal Research, Journal Year: 2019, Volume and Issue: 67(1)

Published: March 21, 2019

Abstract Melatonin and abscisic acid (ABA) play contrasting roles in regulating leaf senescence plants. The molecular mechanism underlying the interaction between melatonin ABA involved senescence, however, remains poorly defined. Herein, we found that exogenous application of delayed Chinese flowering cabbage, accompanied by reduced expression chlorophyll catabolic biosynthetic genes, a lower endogenous level. Significantly, three nucleus‐localized transcriptional activators BrABF1, BrABF4, BrABI5 were identified, their expressions repressed melatonin. In vitro vivo binding experiments revealed activated transcription series genes physically to promoters. Moreover, transient over‐expression BrABF1 , tobacco leaves induced accumulation promoted degradation upregulating resulting accelerated senescence. These effects significantly attenuated treatment. Our findings suggest melatonin‐mediated inhibition involves suppression ABFs‐mediated biosynthesis degradation. Unraveling regulatory controlled expands our understanding regulation this phenomenon offers potentially more effective breeding strategies for extending shelf‐life cabbage.

Language: Английский

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Salinity Tolerance in Plants: Trends and Perspectives

International Journal of Molecular Sciences, Journal Year: 2019, Volume and Issue: 20(10), P. 2408 - 2408

Published: May 15, 2019

Salinity stress is one of the more prevailing abiotic stresses which results in significant losses agricultural crop production, particularly arid and semi-arid areas [...]

Language: Английский

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Alleviating effects of exogenous melatonin on salt stress in cucumber

Scientia Horticulturae, Journal Year: 2019, Volume and Issue: 262, P. 109070 - 109070

Published: Dec. 4, 2019

Language: Английский

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Melatonin alleviates pericarp browning in litchi fruit by regulating membrane lipid and energy metabolisms

Postharvest Biology and Technology, Journal Year: 2019, Volume and Issue: 160, P. 111066 - 111066

Published: Nov. 15, 2019

Language: Английский

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Melatonin as a regulatory hub of plant hormone levels and action in stress situations

Plant Biology, Journal Year: 2020, Volume and Issue: 23(S1), P. 7 - 19

Published: Oct. 24, 2020

Melatonin, a molecule first discovered in animal tissues, plays an important role multiple physiological responses as possible plant master regulator. It mediates to different types of stress, both biotic and abiotic. Melatonin reduces the negative effects associated with stressors, improving response by increasing stress tolerance. When plants respond situations, they use up large amount resources through set perfectly synchronized actions. Responses mediated melatonin plant's hormones to, after adequate modulation, counteract overcome action stressor. In this paper, we review melatonin-plant hormone relationships. Factors that trigger central are analysed. An extensive analysis current studies shows modulates metabolism (biosynthesis catabolism), rise or fall their endogenous levels, regulation signalling elements how affects final auxin, gibberellins, cytokinins, abscisic acid, ethylene, salicylic jasmonates, brassinosteroids, polyamines strigolactones. Lastly, general overview melatonin's actions its regulatory at global level is provided proposals for future research made.

Language: Английский

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Phytomelatonin: An Emerging Regulator of Plant Biotic Stress Resistance

Trends in Plant Science, Journal Year: 2020, Volume and Issue: 26(1), P. 70 - 82

Published: Sept. 4, 2020

Language: Английский

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Melatonin improves rice salinity stress tolerance by NADPH oxidase‐dependent control of the plasma membrane K⁺ transporters and K⁺ homeostasis

Plant Cell & Environment, Journal Year: 2020, Volume and Issue: 43(11), P. 2591 - 2605

Published: March 20, 2020

Abstract This study aimed to reveal the mechanistic basis of melatonin‐mediated amelioration salinity stress in plants. Electrophysiological experiments revealed that melatonin decreased salt‐induced K + efflux (a critical determinant plant salt tolerance) a dose‐ and time‐dependent manner reduced sensitivity plasma membrane ‐permeable channels hydroxyl radicals. These beneficial effects were abolished by NADPH oxidase blocker DPI. Transcriptome analyses induced 585 (448 up‐ 137 down‐regulated) 59 (54 5 differentially expressed genes (DEGs) root tip mature zone, respectively. The most noticeable changes melatonin‐induced increase expression several DEGs encoding respiratory burst oxidases ( OsRBOHA OsRBOHF ), calcineurin B‐like/calcineurin B‐like‐interacting protein kinase OsCBL / OsCIPK calcium‐dependent OsCDPK ) under stress. Melatonin also enhanced potassium transporter OsAKT1 , OsHAK1 OsHAK5 ). Taken together, these results indicate improves tolerance rice enabling retention roots, latter process is conferred scavenging radicals concurrent ‐dependent ROS signalling required activate stress‐responsive uptake transporters tip.

Language: Английский

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Methyl jasmonate mediates melatonin-induced cold tolerance of grafted watermelon plants

Horticulture Research, Journal Year: 2021, Volume and Issue: 8(1)

Published: March 10, 2021

Abstract Root–shoot communication has a critical role in plant adaptation to environmental stress. Grafting is widely applied enhance the abiotic stress tolerance of many horticultural crop species; however, signal transduction mechanism involved this remains unknown. Here, we show that pumpkin- or figleaf gourd rootstock-enhanced cold watermelon shoots accompanied by increases accumulation melatonin, methyl jasmonate (MeJA), and hydrogen peroxide (H 2 O ). Increased melatonin levels leaves were associated with both increased rootstocks MeJA-induced biosynthesis plants under Exogenous MeJA H enhanced tolerance, while inhibition attenuated rootstock-induced tolerance. application induced but JA abolished rootstock- melatonin-induced Additionally, production Taken together, our results suggest grafting-induced inducing . subsequently accumulation, forming self-amplifying feedback loop leads This study reveals novel regulatory

Language: Английский

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Phytomelatonin: an unexpected molecule with amazing performances in plants

Journal of Experimental Botany, Journal Year: 2022, Volume and Issue: 73(17), P. 5779 - 5800

Published: Jan. 12, 2022

Phytomelatonin, a multifunctional molecule that has been found to be present in all plants examined date, an important role as modulatory agent (a biostimulator) improves plant tolerance both biotic and abiotic stress. We review of phytomelatonin considers its roles metabolism particular interactions with hormone network. In the primary plants, melatonin rate efficiency photosynthesis, well related factors such stomatal conductance, intercellular CO2, Rubisco activity. It also shown down-regulate some senescence transcription factors. Melatonin up-regulates many enzyme transcripts carbohydrates (including sucrose starch), amino acids, lipid metabolism, optimizing N, P, S uptake. With respect secondary clear increases polyphenol, glucosinolate, terpenoid, alkaloid contents have described numerous melatonin-treated plants. Generally, most genes these biosynthesis pathways up-regulated by melatonin. The great regulatory capacity is result control redox networks. acts master regulator, up-/down-regulating different levels signalling, key player homeostasis. counteract diverse critical situations pathogen infections stresses, provide varying degrees tolerance. propose possible future applications for crop improvement post-harvest product preservation.

Language: Английский

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