Sodic alkaline stress mitigation with exogenous melatonin involves reactive oxygen metabolism and ion homeostasis in tomato

Liu, Na; Jin, Zhiyong; ShuoShuo, Wang; Gong, Biao; Wen, Dan; Wang, Xiufeng; Wei, Min; Shi, Qinghua

doi:10.1016/j.scienta.2014.10.049

Cited by 97 publications

(67 citation statements)

References 46 publications

(53 reference statements)

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“… and in the freshwater C. australis, where a clear increase in the efficiency of the reaction centers of photosystem II was observed . Recently, similar data have been obtained concerning the protective role of melatonin on the photosynthetic pigments in cold‐stressed wheat ; salt‐, cold‐, and water‐stressed bermudagrass ; salt‐stressed citrus ; salt‐stressed sunflower ; and tomato plants under alkaline stress .…”

Section: Melatonin As An Abiotic Antistressorsupporting

confidence: 65%

Functions of melatonin in plants: a review

Arnao

Hernández‐Ruíz

2015

Journal of Pineal Research

677

529

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The number of studies on melatonin in plants has increased significantly in recent years. This molecule, with a large set of functions in animals, has also shown great potential in plant physiology. This review outlines the main functions of melatonin in the physiology of higher plants. Its role as antistress agent against abiotic stressors, such as drought, salinity, low and high ambient temperatures, UV radiation and toxic chemicals, is analyzed. The latest data on their role in plant-pathogen interactions are also discussed. Both abiotic and biotic stresses produce a significant increase in endogenous melatonin levels, indicating its possible role as effector in these situations. The existence of endogenous circadian rhythms in melatonin levels has been demonstrated in some species, and the data, although limited, suggest a central role of this molecule in the day/night cycles in plants. Finally, another aspect that has led to a large volume of research is the involvement of melatonin in aspects of plant development regulation. Although its role as a plant hormone is still far of from being fully established, its involvement in processes such as growth, rhizogenesis, and photosynthesis seems evident. The multiple changes in gene expression caused by melatonin point to its role as a multiregulatory molecule capable of coordinating many aspects of plant development. This last aspect, together with its role as an alleviating-stressor agent, suggests that melatonin is an excellent prospect for crop improvement.

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Section: Melatonin As An Abiotic Antistressorsupporting

confidence: 65%

Functions of melatonin in plants: a review

Arnao

Hernández‐Ruíz

2015

Journal of Pineal Research

677

529

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“…Melatonin was reported to enhance plant tolerance against various abiotic stressors including cold, hot, drought, salinity, and chemical pollutants (Bajwa et al, 2014; Wei et al, 2014; Liang et al, 2015; Liu et al, 2015; Shi et al, 2015b; Li X. et al, 2016; Xu et al, 2016). But the effect of melatonin on waterlogging resistance is still to be investigated.…”

Section: Discussionmentioning

confidence: 99%

“…Also, melatonin as well as its metabolites can eliminate different kinds of ROS including superoxide anion

(O_{2}^{• -})

, hydrogen peroxide (H 2 O 2 ), hydroxyl radical ( • OH), singlet oxygen ( 1 O 2 ), peroxynitrite anion (ONOO - ) and nitric oxide (NO) (Tan et al, 2013). Melatonin has been reported to protect plants against a variety of abiotic and biotic stresses (Zuo et al, 2014; Liang et al, 2015; Liu et al, 2015; Shi et al, 2015a; Wang et al, 2015; Zhao et al, 2015b; Li C. et al, 2016; Xu et al, 2016). The transgenic Arabidopsis plants, ecotopically expressing melatonin synthetic gene MzASMT1 , had higher endogenous melatonin production and significantly lower ROS than that of their wild types.…”

Section: Introductionmentioning

confidence: 99%

“…The melatonin enriched transgenic Arabidopsis had a greater tolerance to drought stress than the wild types (Zuo et al, 2014). The exogenous melatonin also improved tolerance of tomato plants against alkaline stress by migrating

O_{2}^{• -}

and H 2 O 2 (Liu et al, 2015). Melatonin application to apple leaves alleviated the drought-induced inhibition of photosynthesis (Wang et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Melatonin Improves Waterlogging Tolerance of Malus baccata (Linn.) Borkh. Seedlings by Maintaining Aerobic Respiration, Photosynthesis and ROS Migration

et al. 2017

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Waterlogging, one of the notorious abiotic stressors, retards the growth of apple plants and reduces their production. Thus, it is an urgent agenda for scientists to identify the suitable remedies for this problem. In the current study, we found that melatonin significantly improved the tolerance of apple seedlings against waterlogging stress. This was indicated by the reduced chlorosis and wilting of the seedlings after melatonin applications either by leaf spray or root irrigation. The mechanisms involve in that melatonin functions to maintain aerobic respiration, preserves photosynthesis and reduces oxidative damage of the plants which are under waterlogging stress. Melatonin application also enhances the gene expression of its synthetic enzymes (MbT5H1, MbAANAT3, MbASMT9) and increases melatonin production. This is the first report of a positive feedback that exogenous melatonin application promotes the melatonin synthesis in plants. A post-transcriptional regulation apparently participated in this regulation. When exogenous melatonin meets the requirement of the plants it is found that the protein synthesis of MbASMT9 was suppressed. Taken together, the results showed that melatonin was an effective molecule to protect plant, particularly apple plant, against waterlogging stress.

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“…Treating various plant species with low concentrations of exogenous melatonin (<1 μM) promotes root and coleoptile growth (Hernández-Ruiz et al 2005;Chen et al 2009) and ameliorates stress injury due to salt , alkaline soda stress (Liu et al 2015), drought (Meng et al 2014), and oxidative stress (Dan et al 2015). In addition to mitigating effects on abiotic stressors, melatonin participates in the response to pathogen attack as a signaling molecule by enhancing salicylic acid levels, resulting in resistance to infection (Lee et al , 2015.…”

Section: Introductionmentioning

confidence: 99%

Melatonin production in Escherichia coli by dual expression of serotonin N-acetyltransferase and caffeic acid O-methyltransferase

Byeon

Back

2016

Appl Microbiol Biotechnol

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Melatonin is a well-known bioactive molecule produced in animals and plants and a well-studied natural compound. Two enzymatic steps are required for the biosynthesis of melatonin from serotonin. First, serotonin N-acetyltransferase (SNAT) catalyzes serotonin to N-acetylserotonin (NAS) followed by the action of N-acetylserotonin O-methyltransferase (ASMT), resulting in the synthesis of O-methylated NAS, also known as melatonin. Attempts to document melatonin production in Escherichia coli have been unsuccessful to date due to either low enzyme activity or inactive ASMT expression. Here, we employed caffeic acid O-methyltransferase (COMT) instead of ASMT, as COMT is a multifunctional enzyme that has ASMT activity as well. Among several combinations of dual expression cassettes, recombinant E. coli that expressed sheep SNAT with rice COMT produced a high quantity of melatonin, which was measured in a culture medium (1.46 mg/L in response to 1 mM serotonin). This level was several orders of magnitude higher than that produced in transgenic rice and tomato overexpressing sheep SNAT and ASMT, respectively. This heterologous expression system can be widely employed to screen various putative SNAT or ASMT genes from animals and plants as well as to overproduce melatonin in various useful microorganisms.

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Sodic alkaline stress mitigation with exogenous melatonin involves reactive oxygen metabolism and ion homeostasis in tomato

Cited by 97 publications

References 46 publications

Functions of melatonin in plants: a review

Functions of melatonin in plants: a review

Melatonin Improves Waterlogging Tolerance of Malus baccata (Linn.) Borkh. Seedlings by Maintaining Aerobic Respiration, Photosynthesis and ROS Migration

Melatonin production in Escherichia coli by dual expression of serotonin N-acetyltransferase and caffeic acid O-methyltransferase

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