Melatonin and resveratrol reverse the toxic effect of high boron (B) and modulate biochemical parameters in pepper plants ( Capsicum annuum L.)

Sarafi, Eleana; Tsouvaltzis, Pavlos; Chatzissavvidis, Christos; Siomos, Anastasios S.; Therios, Ioannis

doi:10.1016/j.plaphy.2016.12.018

Cited by 62 publications

(41 citation statements)

References 57 publications

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“…Plants treated with melatonin displayed no visible B toxicity symptoms, and leaves and fruits showed moderate B accumulation and high carbohydrate, carotenoid, and flavonoid contents. The authors took this as a demonstration of the clear protective activity of melatonin in reducing B absorption, suggesting its physiological relevance in B homeostasis [76]. Similar results and conclusions have been obtained in spinach plants exposed to high B concentrations (Table 1).…”

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

confidence: 69%

“…Thus, relevant changes in carbohydrate, lipid, amino acid, nitrogen, phosphorus, and sulfur metabolism indicate the beneficial physiological processes that occur in melatonin treated plants during abiotic stress [86,87,[106][107][108][109]. Melatonin is also involved in secondary metabolism, where it induces anthocyanin biosynthesis and flavonoids [110,111] and also regulates steps in the carotenoid biosynthesis [76,112]. Finally, melatonin regulates the expression of multiple elements (enzymes, receptors, and transcription factors) in the biosynthesis, catabolism, and signaling of auxin, gibberellins, cytokinins, ABA, ethylene, jasmonic acid, SA, brassinosteroid, strigolactones, and polyamines [41,46,48] (Figure 1).…”

Section: Abiotic Stressors Induce a Melatonin Burst That Activates Anmentioning

confidence: 99%

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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: 69%

Section: Abiotic Stressors Induce a Melatonin Burst That Activates Anmentioning

confidence: 99%

Role of Melatonin to Enhance Phytoremediation Capacity

Arnao

Hernández‐Ruíz

2019

Applied Sciences

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“…Melatonin is a multifunctional biomolecule and exerts multiple physiological and biochemical functions in plants [26][27][28]. Moreover, melatonin application has been shown to promote the plant resistance against a plethora of abiotic stress conditions such as salinity [29,30], drought [31,32], low temperature [33], boron [34,35], and heavy metal toxicity [36]. Melatonin can also improve the net photosynthetic rate of plants under various abiotic stresses, principally by maintaining the function of PSII and protecting chlorophyll molecules from degradation [26].…”

Section: Introductionmentioning

confidence: 99%

Melatonin Stimulates Activities and Expression Level of Antioxidant Enzymes and Preserves Functionality of Photosynthetic Apparatus in Hickory Plants (Carya cathayensis Sarg.) under PEG-Promoted Drought

et al. 2019

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Nowadays, drought is one of the major abiotic factors which negatively affects growth and development of several fruit tree species, including Chinese hickory plants (Carya cathayensis Sarg.). The present investigation was conducted to study the possible positive effects of melatonin in drought resistance of C. cathayensis plants along with associated mechanisms. It was observed that melatonin pre-treatment applied before limited water availability significantly contrasted drought-promoted negative effects in terms of plant growth and physiological responses. Significant improvement was observed in key biological parameters like relative water content, net photosynthetic rate, stomatal conductance, transpiration rate, maximum photosynthetic efficiency of photosystem II (PSII), and PSII electron transport rate. Antioxidant apparatus was also stimulated by melatonin and enhanced activities of superoxide dismutase (SOD), catalase (CAT), and ascorbate peroxidase (APX) were noticed along with higher accumulation of proline. Gene expression studies herein revealed that melatonin promoted the up-regulation of the expression of SOD (70.7%), CAT (32.7%), and APX (66.5%) genes. As a consequence, accumulation of malondialdehyde by-products and leaf symptoms were reduced in melatonin-treated plants. All these observations offer the clear evidence that pre-treatment with melatonin ameliorate the performance of Chinese hickory plants against drought stress.

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“…Tissue phenol determination of plant samples was made according to a method using the Folin-Ciocalteau reagent as described by Sarafi et al (2017), and expressed as mg gallic acid equivalent (GAE) g -1 of fresh weight (FW).…”

Section: Total Phenolsmentioning

confidence: 99%

“…Tissue flavonoid determination of plant samples was made according to a colorimetric method as described by Sarafi et al (2017). Rutin was used as the standard compound for the quantification of total flavonoids.…”

Section: Total Flavonoidsmentioning

confidence: 99%