Light‐regulated melatonin biosynthesis in rice during the senescence process in detached leaves

Byeon, Yeong; Park, Sang-Kyu; Youngsoon, Kim; Park, Don-Hee; Lee, Sungbeom; Back, Kyoungwhan

doi:10.1111/j.1600-079x.2012.00976.x

Cited by 107 publications

(105 citation statements)

References 26 publications

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“…Level of this indoleamin increases at night and decreases during the day MEL which is why it is called the hormone of darkness in animals (Reiter 1991a, b). However, light influence on MEL biosynthesis during rice leaf senescence is in contrast to animals (Byeon et al 2012). A pattern of MEL synthesis similar as in animals was observed in many plant species although in some photosynthetic species it can be synthesized also during the day Tan et al 2012a).…”

Section: Regulatory Roles Of Mel In Plantsmentioning

confidence: 72%

Melatonin, an underestimated natural substance with great potential for agricultural application

Janas

Posmyk

2013

Acta Physiol Plant

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Melatonin (MEL) was thought to be only a neurotransmitter found in vertebrates until its detection in other organisms including plants. Although the number of publications on MEL function in plants is expanding, the knowledge of this subject is still insufficient. Among many functions which MEL performs in plants, its role as an antioxidant and a growth promoter is most supported by experimental evidence. This compound is an independent plant growth regulator and it may mediate the activities of other plant growth regulators. Due to its antioxidant properties MEL may also stabilize cell redox status and protect tissues against reactive oxygen and nitrogen species which accumulated under stressful environment. Some researchers propose that MEL could be used to improve the phytoremediation efficiency of plants against different pollutants. In this paper we show that exogenous MEL applied into the seeds could be a good biostimulator improving not only seed germination, seedling/plant growth but also crop production especially under stress conditions. We also believe that this compound can increase food quality (the aspect of functional food) and may improve human health. Since MEL is inexpensive and safe for animals and humans its application as a biostimulator could be a good, feasible and cost-effective method useful in agriculture.

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Section: Regulatory Roles Of Mel In Plantsmentioning

confidence: 72%

Melatonin, an underestimated natural substance with great potential for agricultural application

Janas

Posmyk

2013

Acta Physiol Plant

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“…It is well known that various stressors induce melatonin production in plants as well as in animals (Byeon et al, 2012; Li C. et al, 2016; Xu et al, 2016). This is considered as self-defense of organisms against external insults (Tan et al, 2015).…”

Section: Discussionmentioning

confidence: 99%

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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“…Conversely, studies conducted in water hyacinth demonstrated a peak in melatonin levels late in the day [19], indicating its biosynthesis in light. Furthermore, melatonin biosynthesis occurred under constant light in senescent rice leaves and was nearly undetectable under constant darkness [22]. Other reports found no significant correlation with melatonin levels and day/night cycles [18].…”

Section: Introductionmentioning

confidence: 88%

Arabidopsis Transcriptome Analysis Reveals Key Roles of Melatonin in Plant Defense Systems

et al. 2014

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Melatonin is a ubiquitous molecule and exists across kingdoms including plant species. Studies on melatonin in plants have mainly focused on its physiological influence on growth and development, and on its biosynthesis. Much less attention has been drawn to its affect on genome-wide gene expression. To comprehensively investigate the role(s) of melatonin at the genomics level, we utilized mRNA-seq technology to analyze Arabidopsis plants subjected to a 16-hour 100 pM (low) and 1 mM (high) melatonin treatment. The expression profiles were analyzed to identify differentially expressed genes. 100 pM melatonin treatment significantly affected the expression of only 81 genes with 51 down-regulated and 30 up-regulated. However, 1 mM melatonin significantly altered 1308 genes with 566 up-regulated and 742 down-regulated. Not all genes altered by low melatonin were affected by high melatonin, indicating different roles of melatonin in regulation of plant growth and development under low and high concentrations. Furthermore, a large number of genes altered by melatonin were involved in plant stress defense. Transcript levels for many stress receptors, kinases, and stress-associated calcium signals were up-regulated. The majority of transcription factors identified were also involved in plant stress defense. Additionally, most identified genes in ABA, ET, SA and JA pathways were up-regulated, while genes pertaining to auxin responses and signaling, peroxidases, and those associated with cell wall synthesis and modifications were mostly down-regulated. Our results indicate critical roles of melatonin in plant defense against various environmental stresses, and provide a framework for functional analysis of genes in melatonin-mediated signaling pathways.

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Light‐regulated melatonin biosynthesis in rice during the senescence process in detached leaves

Cited by 107 publications

References 26 publications

Melatonin, an underestimated natural substance with great potential for agricultural application

Melatonin, an underestimated natural substance with great potential for agricultural application

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

Arabidopsis Transcriptome Analysis Reveals Key Roles of Melatonin in Plant Defense Systems

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