Alleviating effects of exogenous melatonin on salt stress in cucumber

Zhang, Tengguo; Shi, Zhongfei; Zhang, Xiaohua; Zheng, Sheng; Wang, Juan; Mo, Jiangnan

doi:10.1016/j.scienta.2019.109070

Cited by 134 publications

(86 citation statements)

References 41 publications

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“…The current study highlights the significant decline in almost all of the growth parameters of plants under salt stress but this decline was significantly alleviated by the exogenous melatonin, which has been proved as a plant growth regulator (Zhang et al 2013). Ke et al (2018), Li et al (2019c), Yin et al (2019), Zafar et al (2019), and Zhang et al (2020) showed that leaf senescence can be delayed by application of melatonin and also plant resistance against cold, drought, salt, and many other abiotic stresses can be enhanced. Results of the current study indicated that growth and biomass production could be effectively increased by 100 µM melatonin (Figs.…”

Section: Discussionmentioning

confidence: 73%

“…For instance, salt stressinduced oxidative stress can significantly be alleviated by melatonin in tomato (Siddiqui et al 2019, Yin el al. 2019 and in cucumber (Wang et al 2016a, Zhang et al 2020, cadmium-induced oxidative stress in rice (Byeon et al 2015) and paraquat-induced oxidative stress in Arabidopsis thaliana (Weeda et al 2014). Similarly, as mentioned by Li et al (2017b), under low-temperature stress, the content of ROS can be reduced and the activity of an antioxidant enzyme can be enhanced by melatonin in wheat seedlings.…”

Section: Discussionmentioning

confidence: 89%

“…MDA content and electrolyte leakage caused by salt stress can be significantly be reduced by 1 μM melatonin (Jiang et al 2016). The MDA content and relative conductivity can be decreased by melatonin pretreatment in tomato seedling (Hasan et al 2015) and cucumber seedling (Zhang et al 2020).…”

Section: Discussionmentioning

confidence: 92%

“…The protective role of melatonin pretreatment has been proved under salinity in many plants. Many studies reported that photosynthesis and chlorophyll content were improved in tomato seedlings (Zhou et al 2016, Yin et al 2019, watermelon seedling (Li et al 2017a), lettuce seedling (Yan et al 2016), and cucumber seedling (Wang et al 2016a, Zhang et al 2020. Under drought, it has been reported by Liu et al (2015a) that antioxidant capacity and photosynthesis of tomato seedlings are enhanced by melatonin treatment.…”

Section: Discussionmentioning

confidence: 99%

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Exogenous melatonin enhances salt stress tolerance in tomato seedlings

Altaf¹,

Shahid²,

Ren³

et al. 2020

Biologia plant.

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Melatonin (N-acetyl-5-methoxytryptamine) is an essential molecule which regulates plant growth and development and alleviates the damaging effects of abiotic stresses. To evaluate the important functions of melatonin in response to salinity stress, the effects of exogenous melatonin on the antioxidant system and growth of tomato (Solanum lycopersicum L.) under 150 mM NaCl stress were investigated. The application of 100 μM melatonin compensated the growth inhibition caused by salt-stress. Melatonin treated seedlings had an increased fresh and dry masses of shoots and roots. The application of 1-200 µM melatonin notably enhanced the relative chlorophyll content (SPAD index), root characteristics, and gas exchange in tomato seedlings subjected to salt stress compared to seedlings treated with salt stress alone. Moreover, melatonin pretreatment minimized accumulation of reactive oxygen species and improved activities of antioxidative enzymes including catalase, superoxide dismutase, glutathione reductase, and ascorbate peroxidase.

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Section: Discussionmentioning

confidence: 73%

Section: Discussionmentioning

confidence: 89%

Section: Discussionmentioning

confidence: 92%

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Exogenous melatonin enhances salt stress tolerance in tomato seedlings

Altaf¹,

Shahid²,

Ren³

et al. 2020

Biologia plant.

View full text Add to dashboard Cite

show abstract

“…Moreover, melatonin mitigates salt stress by regulating polyamine metabolism in wheat seedlings. In cucumber seedlings grown under salt stress conditions, applying melatonin increased antioxidant enzyme activity, improved cell viability, and reduced malondialdehyde (MDA) content [16]. It has been shown that melatonin activates antioxidant systems, including the ascorbate-glutathione cycle and increased the concentration of ascorbic acid and glutathione [14,17].…”

Section: Introductionmentioning

confidence: 99%

Melatonin Regulatory Mechanisms and Phylogenetic Analyses of Melatonin Biosynthesis Related Genes Extracted from Peanut under Salinity Stress

ElSayed

Boulila

Rafudeen

et al. 2020

Plants

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Melatonin improves the tolerance of plants to various environmental stresses by protecting plant cells against oxidative stress damage. The objective of the current study was to determine whether exogenous melatonin (MT) treatments could help protecting peanut (Arachis hypogaea) seedlings against salinity stress. This was achieved by investigating enzymatic and non-enzymatic antioxidant systems and the expression of melatonin biosynthesis related genes in response to salinity stress with or without exogenous MT. The results showed a significant increase in the concentrations of reactive oxygen species (ROS) in peanut seedlings under salinity stress. The exogenous application of melatonin decreased the levels of ROS through the activation of antioxidant enzymes in peanut seedlings under salinity stress. Transcription levels of melatonin biosynthesis related genes such as N‐acetylserotonin methyltransferase (ASMT1, ASMT2, ASMT3), tryptophan decarboxylase (TDC), and tryptamine 5‐hydroxylase (T5H) were up-regulated with a 150 µM melatonin treatment under salinity stress. The results indicated that melatonin regulated the redox homeostasis by its ability to induce either enzymatic or non-enzymatic antioxidant systems. In addition, phylogenetic analysis of melatonin biosynthesis genes (ASMT1, ASMT2, ASMT3, TDC, T5H) were performed on a total of 56 sequences belonging to various plant species including five new sequences extracted from Arachis hypogaea (A. hypogaea). This was based on pairwise comparison among aligned nucleotides and predicted amino acids as well as on substitution rates, and phylogenetic inference. The analyzed sequences were heterogeneous and the A. hypogaea accessions were primarily closest to those of Manihot esculenta, but this needs further clarification.

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Melatonin mediated activation of MAP kinase pathway may reduce DNA damage stress in plants: A review

Maity

Guchhait²,

Pramanick

2022

BioFactors

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Melatonin is an important biomolecule found in diverse groups of organisms. Under different abiotic stresses, the synthesis of melatonin is markedly increased suggesting pivotal roles of melatonin in plants enduring stresses. Being an endogenous signaling molecule with antioxidant activity, melatonin alters many physiological responses and is found to be involved in regulating DNA damage responses. However, the molecular mechanisms of melatonin in response to DNA damage have not yet been studied. The present review aims to provide insights into the molecular mechanisms of melatonin in response to DNA damage in plants. We propose that the MAP kinase pathway is involved in regulating melatonin dependent response of plants under DNA damage stress. Where melatonin might activate MAPK via H2O2 or Ca2+ dependent pathways. The activated MAPK in turn might phosphorylate and activate SOG1 and repressor type MYBs to mitigate DNA damage under abiotic stress.

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Alleviating effects of exogenous melatonin on salt stress in cucumber

Cited by 134 publications

References 41 publications

Exogenous melatonin enhances salt stress tolerance in tomato seedlings

Exogenous melatonin enhances salt stress tolerance in tomato seedlings

Melatonin Regulatory Mechanisms and Phylogenetic Analyses of Melatonin Biosynthesis Related Genes Extracted from Peanut under Salinity Stress

Melatonin mediated activation of MAP kinase pathway may reduce DNA damage stress in plants: A review

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