Melatonin pretreatment improves vanadium stress tolerance of watermelon seedlings by reducing vanadium concentration in the leaves and regulating melatonin biosynthesis and antioxidant-related gene expression

Nawaz, Muhammad Azher; Jiao, Yanyan; Chen, Chen; Shireen, Fareeha; Zheng, Zuhua; Imtiaz, Muhammad; Bie, Zhilong; Huang, Yuan

doi:10.1016/j.jplph.2017.11.003

Cited by 267 publications

(155 citation statements)

References 71 publications

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“…In V treated plants, melatonin also renewed plant growth and increased photosynthesis efficiency; the antioxidant enzyme pool was also improved. Taken together, this evidence underlines the protective role of melatonin in increasing V tolerance [75].…”

Section: Metals As a Severe Abiotic Stress And Effects Induced By Melsupporting

confidence: 63%

Role of Melatonin to Enhance Phytoremediation Capacity

Arnao

Hernández‐Ruíz

2019

Applied Sciences

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Phytoremediation is a green technology that aims to take up pollutants from soil or water. Metals are one of the targets of these techniques due to their high toxicity in biological systems, including plants and animals. Their elimination or, at least, decrease will help keep them from being incorporated in the trophic chain and thus reaching animal and human food. The metal removal efficiency of plants is closely related to their growth rate, tolerance, and their adaptability to different environments. Melatonin (N-acetyl-5-methoxytryptamine) is a ubiquitous molecule present in animals, plants, fungi, and bacteria. In plants, it plays an important role related to antioxidant activity, but also as an important redox network regulator. Thus, melatonin has been defined as a biostimulator of plant growth, especially under environmental stress conditions, whether abiotic (water deficit and waterlogging, extreme temperature, UV radiation, salinity, alkalinity, specific mineral deficit/excess, metals and other toxic compounds, etc.) or biotic (bacteria, fungi, and viruses). Exogenous melatonin treated plants have been seen to have a high tolerance to stressors, minimizing possible harmful effects through the control of reactive oxygen species (ROS) levels and activating antioxidative responses. Furthermore, important gene expression changes in stress specific transcription factors have been demonstrated. Melatonin is capable of mobilizing toxic metals, through phytochelatins, transporting this, while sequestration adds to the biostimulator effect of melatonin on plants, improving plant tolerance against toxic pollutants. Furthermore, melatonin improves the uptake of nitrogen (N), phosphorus (P), and sulfur (S) in stress situations, enhancing cell metabolism. In light of the above, the application of melatonin seems to be a useful option for clearing toxic pollutants from the environment by improving phytoremediation. Interestingly, a variety of stressors induce melatonin biosynthesis in plants, and the study of this endogenous response in hyperaccumulator plants may be even more interesting as a natural response of the phytoremediation of diverse plants.

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Section: Metals As a Severe Abiotic Stress And Effects Induced By Melsupporting

confidence: 63%

Role of Melatonin to Enhance Phytoremediation Capacity

Arnao

Hernández‐Ruíz

2019

Applied Sciences

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“…It was found that MEL application significantly reduced the Cd content in M aquaticum shoots, and in G parviflora , suggesting active involvement of MEL in improving remediation efficiency of plants. Similarly, MEL application lowered the concentration of vanadium in the leaves and stem of watermelon plants by reducing its translocation from the root to shoot . This evidence has shown the active involvement of exogenous/endogenous MEL in supporting phyto‐remediative capacities of plants by restricting the mobility in the rhizosphere and aerial parts, along with boosting the activities of other key processes such as vacuolar transporter, phytochelatins, and GSH which are further involved in the sequestration and detoxification of these pollutants in plants.…”

Section: Mel Prospects In Phytoremediationmentioning

confidence: 83%

Phytomelatonin: Recent advances and future prospects

Kanwar

Zhou

2018

Journal of Pineal Research

175

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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“…Watermelon grafting onto rootstocks enhanced the nitrogen uptake efficiency and nitrogen use efficiency by 21% and 38%, respectively [30]. According to some previous studies, rootstocks enhance nutrient [14,39,40] and cytokinin supply to the scion, improve growth and dry matter accumulation, and trigger the gene expression of nitrate reductase and nitrite reductase enzymes [4,22,43]. In fruit crops, such as grapes, nitrate uptake is favored by the presence of rootstocks and the characteristics of the scion.…”

Section: Discussionmentioning

confidence: 98%

Nitrogen Use Efficiency of Watermelon Grafted onto 10 Wild Watermelon Rootstocks under Low Nitrogen Conditions

et al. 2018

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Nitrogen availability is the key determinant of plant growth and development. The improvement of nitrogen use efficiency (NUE) in crops is an important consideration. In fruit and vegetables, such as watermelon, rootstocks are often utilized to control soil borne diseases and improve plant performance to a range of abiotic stresses. In this study, we evaluated the efficacy of 10 wild watermelon rootstocks (ZXG-516, ZXG-941, ZXG-945, ZXG-1250, ZXG-1251, ZXG-1558, ZXG-944, ZXG-1469, ZXG-1463, and ZXG-952) to improve the plant growth and nitrogen use efficiency (NUE) of the watermelon cultivar: Zaojia 8424. Nitrogen use efficiency (NUE) is a comprehensive parameter that represents the ability of a plant to absorb nitrogen (N) and convert the supplied resources to the dry biomass. Wild watermelon rootstocks substantially improved plant growth, rate of photosynthesis, stomatal conductivity, intercellular carbon dioxide concentration, rate of transpiration, nitrogen uptake efficiency, nitrogen use efficiency, and nitrogen utilization efficiency of watermelon. NUE of watermelon grafted onto ZXG-945, ZXG-1250, and ZXG-941 was improved by up to 67%, 77%, and 168%, respectively, at optimum N supply. Similarly, at low N supply (0.2 mM), NUE of watermelon grafted onto ZXG-1558 and ZXG-516 was improved by up to 104% and 175%, respectively. In conclusion, grafting onto some wild rootstocks can improve nitrogen use efficiency of watermelon, and this improved nitrogen use efficiency could be attributed to better N uptake efficiency of wild watermelon rootstocks.

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Melatonin pretreatment improves vanadium stress tolerance of watermelon seedlings by reducing vanadium concentration in the leaves and regulating melatonin biosynthesis and antioxidant-related gene expression

Cited by 267 publications

References 71 publications

Role of Melatonin to Enhance Phytoremediation Capacity

Role of Melatonin to Enhance Phytoremediation Capacity

Phytomelatonin: Recent advances and future prospects

Nitrogen Use Efficiency of Watermelon Grafted onto 10 Wild Watermelon Rootstocks under Low Nitrogen Conditions

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