Endophytic Bacterium Pseudomonas fluorescens RG11 May Transform Tryptophan to Melatonin and Promote Endogenous Melatonin Levels in the Roots of Four Grape Cultivars

Ma, Yaner; Jiao, Jian; Fan, Xianqun; Sun, Han; Zhang, Ying; Jiang, Jianfu; Liu, Chonghuai

doi:10.3389/fpls.2016.02068

Cited by 65 publications

(64 citation statements)

References 76 publications

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“…Therefore, it becomes clear that endophytic bacteria have the potential for MEL synthesis via host‐plant interactions. The enhanced in vitro MEL biosynthesis in the roots of different grape cultivars by endophytic bacterium Pseudomonas fluorescens (RG11) under salt stress conditions has been observed . This study further adds to the existing knowledge on endogenous phytomelatonin biosynthesis by rhizobacteria in plants when exposed to abiotic stress.…”

Section: Mel Regulates Plant‐rhizomicrobial Interactionsmentioning

confidence: 57%

“…Evolutionary evidence has suggested that many land plants establish symbiotic relations with diverse microbes, such as bacteria, fungi, and actinomycetes, all of which can dwell in their roots and other organs . Studies have established the beneficial aspects of plant‐microbes in terms of providing a shield against phyto‐pathogens while negating the ill effects of stresses .…”

Section: Mel Regulates Plant‐rhizomicrobial Interactionsmentioning

confidence: 99%

“…In their natural habitat, plant tissues are often inhabited by numerous microbes that are important in providing resistance from phyto‐pathogen infections and improve growth via nitrogen fixation and phosphorus solubilization . These microbes also provide phytohormones such as ABA, jasmonic acid, GAs, auxin, and CKs to their host plants …”

Section: Mel Regulates Plant‐rhizomicrobial Interactionsmentioning

confidence: 99%

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Phytomelatonin: Recent advances and future prospects

Kanwar

Zhou

2018

Journal of Pineal Research

161

109

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Melatonin (MEL) has been revealed as a phylogenetically conserved molecule with a ubiquitous distribution from primitive photosynthetic bacteria to higher plants, including algae and fungi. Since MEL is implicated in numerous plant developmental processes and stress responses, the exploration of its functions in plant has become a rapidly progressing field with the new paradigm of involvement in plants growth and development. The pleiotropic involvement of MEL in regulating the transcripts of numerous genes confirms its vital involvement as a multi‐regulatory molecule that architects many aspects of plant development. However, the cumulative research in plants is still preliminary and fragmentary in terms of its established functions compared to what is known about MEL physiology in animals. This supports the need for a comprehensive review that summarizes the new aspects pertaining to its functional role in photosynthesis, phytohormonal interactions under stress, cellular redox signaling, along with other regulatory roles in plant immunity, phytoremediation, and plant microbial interactions. The present review covers the latest advances on the mechanistic roles of phytomelatonin. While phytomelatonin is a sovereign plant growth regulator that can interact with the functions of other plant growth regulators or hormones, its qualifications as a complete phytohormone are still to be established. This review also showcases the yet to be identified potentials of phytomelatonin that will surely encourage the plant scientists to uncover new functional aspects of phytomelatonin in plant growth and development, subsequently improving its status as a potential new phytohormone.

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Section: Mel Regulates Plant‐rhizomicrobial Interactionsmentioning

confidence: 57%

Section: Mel Regulates Plant‐rhizomicrobial Interactionsmentioning

confidence: 99%

Section: Mel Regulates Plant‐rhizomicrobial Interactionsmentioning

confidence: 99%

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Phytomelatonin: Recent advances and future prospects

Kanwar

Zhou

2018

Journal of Pineal Research

161

109

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“…[67][68][69]. Furthermore, several investigations have studied the role of endophytic rhizobacteria in the reinforcement ability of plants to produce melatonin [70,71]. In addition, melatonin inhibited the total microorganisms, including mold, yeast, and bacteria, in stored apple juice during the storage time (4-12 h) [72].…”

Section: Antifungal Effect Of Melatoninmentioning

confidence: 99%

Melatonin and Its Protective Role against Biotic Stress Impacts on Plants

Almoneafy²,

et al. 2019

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A.A.); shaoyingai@21cn.com (S.A.); Tel.: +86-186-8050-4072 (M.M.-F.); +967-777766831 (A.A); +86-020-3288-5970 (S.A.) † These authors contributed equally to this work.Abstract: Biotic stress causes immense damage to agricultural products worldwide and raises the risk of hunger in many areas. Plants themselves tolerate biotic stresses via several pathways, including pathogen-associated molecular patterns (PAMPs), which trigger immunity and plant resistance (R) proteins. On the other hand, humans use several non-ecofriendly methods to control biotic stresses, such as chemical applications. Compared with chemical control, melatonin is an ecofriendly compound that is an economical alternative strategy which can be used to protect animals and plants from attacks via pathogens. In plants, the bactericidal capacity of melatonin was verified against Mycobacterium tuberculosis, as well as multidrug-resistant Gram-negative and -positive bacteria under in vitro conditions. Regarding plant-bacteria interaction, melatonin has presented effective antibacterial activities against phytobacterial pathogens. In plant-fungi interaction models, melatonin was found to play a key role in plant resistance to Botrytis cinerea, to increase fungicide susceptibility, and to reduce the stress tolerance of Phytophthora infestans. In plant-virus interaction models, melatonin not only efficiently eradicated apple stem grooving virus (ASGV) from apple shoots in vitro (making it useful for the production of virus-free plants) but also reduced tobacco mosaic virus (TMV) viral RNA and virus concentration in infected Nicotiana glutinosa and Solanum lycopersicum seedlings. Indeed, melatonin has unique advantages in plant growth regulation and increasing plant resistance effectiveness against different forms of biotic and abiotic stress. Although considerable work has been done regarding the role of melatonin in plant tolerance to abiotic stresses, its role in biotic stress remains unclear and requires clarification. In our review, we summarize the work that has been accomplished so far; highlight melatonin's function in plant tolerance to pathogens such as bacteria, viruses, and fungi; and determine the direction required for future studies on this topic.

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“…When grapewine roots are exposed to salinity or drought stress colonized by B. amyloliquefaciens SB‐9, it increases the production of melatonin and also its intermediates. It was found that endophytic bacteria Pseudomonas fluorescens RG11 is able to produce melatonin and enhance endogenous melatonin in Vitis vinifera L. roots under abiotic stress …”

Section: Introductionmentioning

confidence: 99%

Role of Melatonin and Plant‐Growth‐Promoting Rhizobacteria in the Growth and Development of Plants

Asif

Pervez

Ahmad

2019

CLEAN Soil Air Water

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Melatonin is a tryptophan‐based indole molecule found in primitive photosynthetic bacteria to mammals. It performs different functions in plants like rhizogenesis, enhancing plant growth, seed germination, plant yield, biomass production, photosynthesis, circadian rhythm, and fruit ripening. In addition, one of the most significant attributes of melatonin is its antioxidant activity. Moreover, it works as an anti‐stress agent against different biotic and abiotic stresses like drought, salinity, potentially toxic metals, and pathogens. Melatonin forms antioxidant cascade reaction by scavenging free radicals that enhances its antioxidant capacity. In response to different stress conditions, expression of genes involved in melatonin synthesis is increased. In the same way, plant‐growth‐promoting rhizobacteria colonize plant roots and enhance plant growth by a number of mechanisms like phosphate solubilization, nitrogen fixation, siderophore production, production of phytohormones, phytoremediation, disease suppression, and production of 1‐aminocyclopropane‐1‐carboxylate deaminase. Thus, melatonin and plant‐growth‐promoting rhizobacteria are involved in enhancing plant growth under abiotic and biotic stress but the mechanisms of action of both are different. Therefore, in this study, the data on the impact of melatonin and plant‐growth‐promoting rhizobacteria on plants are combined for the first time and how these could be useful in enhancing the plant growth is examined. In addition, the research gaps are identified in melatonin and plant‐growth‐promoting rhizobacteria research already conducted from the last few decades that will help the scientific community in further research.

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Endophytic Bacterium Pseudomonas fluorescens RG11 May Transform Tryptophan to Melatonin and Promote Endogenous Melatonin Levels in the Roots of Four Grape Cultivars

Cited by 65 publications

References 76 publications

Phytomelatonin: Recent advances and future prospects

Phytomelatonin: Recent advances and future prospects

Melatonin and Its Protective Role against Biotic Stress Impacts on Plants

Role of Melatonin and Plant‐Growth‐Promoting Rhizobacteria in the Growth and Development of Plants

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