Effects of exogenous melatonin and glutathione on zinc toxicity in safflower (Carthamus tinctorius L.) seedlings

Goodarzi, Asiyeh; Namdjoyan, Shahram; Soorki, Ali Abolhasani

doi:10.1016/j.ecoenv.2020.110853

Cited by 63 publications

(28 citation statements)

References 48 publications

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“…Plant HM toxicity can also be repelled by stimulating the biosynthesis of metal-binding peptides, such as phytochelatins (PCs) [ 164 ]. Application of MT and GSH in safflower seedlings under Zn stress, increased the PC content, which could be partially related to the enhancing role of MT in encouraging transcription of the genes engaged in encoding the enzymes accountable for the biosynthesis PCs [ 165 ]. MT upregulated several metal transporter genes, including ZIP12 (zinc-iron permease 12), HMA4 (heavy metal ATPase 4), YSL2 (yellow stripe-like transporter 2), and YSL7 (yellow stripe-like transporter 7) subjected to long-distance transport of Cd and stimulated the transport of Cd beyond the radish root cell and CAX4 (vacuolar cation/proton exchanger 4), ATP-binding cassette (ABC) transporters ( ABCC14 , ABCB21 , ABCG39 ) responsible for sequestration of Cd into the vacuole [ 166 ].…”

Section: Mechanisms Of Melatonin-mediated Heavy Metal Stress Tolerancementioning

confidence: 99%

Melatonin Modulates Plant Tolerance to Heavy Metal Stress: Morphological Responses to Molecular Mechanisms

Hoque

Tahjib‐Ul‐Arif

Hannan

et al. 2021

IJMS

122

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Heavy metal toxicity is one of the most devastating abiotic stresses. Heavy metals cause serious damage to plant growth and productivity, which is a major problem for sustainable agriculture. It adversely affects plant molecular physiology and biochemistry by generating osmotic stress, ionic imbalance, oxidative stress, membrane disorganization, cellular toxicity, and metabolic homeostasis. To improve and stimulate plant tolerance to heavy metal stress, the application of biostimulants can be an effective approach without threatening the ecosystem. Melatonin (N-acetyl-5-methoxytryptamine), a biostimulator, plant growth regulator, and antioxidant, promotes plant tolerance to heavy metal stress by improving redox and nutrient homeostasis, osmotic balance, and primary and secondary metabolism. It is important to perceive the complete and detailed regulatory mechanisms of exogenous and endogenous melatonin-mediated heavy metal-toxicity mitigation in plants to identify potential research gaps that should be addressed in the future. This review provides a novel insight to understand the multifunctional role of melatonin in reducing heavy metal stress and the underlying molecular mechanisms.

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Section: Mechanisms Of Melatonin-mediated Heavy Metal Stress Tolerancementioning

confidence: 99%

Melatonin Modulates Plant Tolerance to Heavy Metal Stress: Morphological Responses to Molecular Mechanisms

Hoque

Tahjib‐Ul‐Arif

Hannan

et al. 2021

IJMS

122

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show abstract

“…Although exogenous selenocysteine could ameliorate Cd phytotoxicity, a basal level of endogenous MET was required for Se-conferred Cd tolerance, which may enhance the detoxification of Cd [ 77 ]. On the other hand, Goodarzi et al [ 78 ] showed that the application of MET, GSH, and in particular, the combination of these two signaling molecules, could significantly reduce the dangerous effects of Zn-induced toxicity in safflower ( Carthamus tinctorius ) by reducing Zn accumulation in the shoots of safflower seedlings, and stimulating various antioxidant defense systems [ 78 ]. In addition, Siddiqui et al [ 79 ] found that a combination of MET and Ca 2+ was more efficient than their separate use to increase the tolerance of Vicia faba plants under metalloid As toxicity.…”

Section: Roles Of Met In Metal Toxicity Tolerancementioning

confidence: 99%

ROS and NO Phytomelatonin-Induced Signaling Mechanisms under Metal Toxicity in Plants: A Review

et al. 2021

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Metal toxicity in soils, along with water runoff, are increasing environmental problems that affect agriculture directly and, in turn, human health. In light of finding a suitable and urgent solution, research on plant treatments with specific compounds that can help mitigate these effects has increased, and thus the exogenous application of melatonin (MET) and its role in alleviating the negative effects of metal toxicity in plants, have become more important in the last few years. MET is an important plant-related response molecule involved in growth, development, and reproduction, and in the induction of different stress-related key factors in plants. It has been shown that MET plays a protective role against the toxic effects induced by different metals (Pb, Cd, Cu, Zn, B, Al, V, Ni, La, As, and Cr) by regulating both the enzymatic and non-enzymatic antioxidant plant defense systems. In addition, MET interacts with many other signaling molecules, such as reactive oxygen species (ROS) and nitric oxide (NO) and participates in a wide variety of physiological reactions. Furthermore, MET treatment enhances osmoregulation and photosynthetic efficiency, and increases the concentration of other important antioxidants such as phenolic compounds, flavonoids, polyamines (PAs), and carotenoid compounds. Some recent studies have shown that MET appeared to be involved in the regulation of metal transport in plants, and lastly, various studies have confirmed that MET significantly upregulated stress tolerance-related genes. Despite all the knowledge acquired over the years, there is still more to know about how MET is involved in the metal toxicity tolerance of plants.

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“…Although exogenous selenocysteine could ameliorate Cd phytotoxicity, a basal level of endogenous MET was required for Se-conferred Cd tolerance, which may enhance the detoxification of Cd [52]. On the other hand, Goodarzi et al (2020) showed that they application of MET, GSH, and in particular, the combination of these two signaling molecules, could significantly reduce the dangerous effects of Zn-induced toxicity in safflower (Carthamus tinctorius L.) by reducing Zn accumulation in the shoots of safflower seedlings, and stimulating various antioxidant defense systems [53]. In addition, Siddiqui et al (2020) found that a combination of MET and Ca2+ was more efficient than their separate use to increase the tolerance of Vicia faba plants under metalloid arsenic (As) toxicity.…”

Section: Regulation Of Metal Transport By Metmentioning

confidence: 99%

“…Pers.) [128] maize (Z. mays L.) [120] Ulva (green macroalga) [141] Cd mallow (Malva parviflora, Malvaceae) [49] Spinacia oleracea L. [142] strawberries (Fragaria × ananassa) [81] alfalfa [130] tomato [131][132][133] wheat [124,134] Cyphomandra betacea [135] Malachium aquaticum [136] Galinsoga parviflora [136] Perilla frutescens [137] rice [138,139] Ulva [140,141] rapeseed (Brassica napus) [48] cucumber (Cucumis sativus L.) [95] Cu cucumber (Cucumis sativus L.) [100] melon (Cucumis melo L.) [45] Zn Ulva (green macroalga) [141] wheat (Triticum aestivum L.) [143] safflower (Carthamus tinctorius L.) [53] Al soybean (Glycine max L.) [148] wheat [149] rapeseed (Brassica napus) [48] V watermelon (Citrullus lanatus) [50] Ni tomato (S. lycopersicum L.) [144] Cr wheat (Triticum aestivum L.) [145] canola (Brassica napus L.) [147] B wheat (Triticum aestivum ) [30] As rosemary (Rosmarinus officinalis L.) [150] rice (Oryza sativa L.) [41,51] AsA-GSH cycle Pb bermudagrass (Cynodon dactylon L.) [128] maize (Z. mays L.) [120] Ulva (green macroalga)…”

Section: Plant Specie Referencesmentioning

confidence: 99%

ROS and NO Phytomelatonin-Induced Signaling Mechanisms Under Metal Toxicity in Plants: A Review

Pardo-Hernández¹,

López-Delacalle²,

Marti-Guillen³

et al. 2021

Preprint

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Metal toxicity in soils, along with water runoff, are increasing environmental problems that affect agriculture directly and, in turn, human health. In light of finding a suitable and urgent solution, research on plant treatments with specific compounds that can help mitigate these effects has increased, and thus the exogenous application of melatonin (MET) and its role in alleviating the negative effects of metal toxicity in plants, have become more important in the last few years. MET is an important plant-related response molecule involved in growth, development, and reproduction, and in the induction of different stress-related key factors in plants. It has been shown that MET plays a protective role against the toxic effects induced by different metals (Pb, Cd, Cu, Zn, B, Al, V, Ni, La, As, and Cr) by regulating both the enzymatic and non-enzymatic antioxidant plant defense systems. In addition, MET interacts with many other signaling molecules, such as reactive oxygen species (ROS) and nitric oxide (NO), and participates in a wide variety of physiological reactions. Furthermore, MET treatment enhances osmoregulation and photosynthetic efficiency and increases the concentration of other important antioxidants such as phenolic compounds, flavonoids, polyamines (PAs), and carotenoid compounds. Some recent studies have shown that MET appeared to be involved in the regulation of metal transport in plants, and lastly, various studies have confirmed that MET significantly upregulated stress tolerance-related genes. Despite all the knowledge acquired over the years, there is still more to know about how MET is involved in the metal toxicity tolerance of plants.

show abstract

Effects of exogenous melatonin and glutathione on zinc toxicity in safflower (Carthamus tinctorius L.) seedlings

Cited by 63 publications

References 48 publications

Melatonin Modulates Plant Tolerance to Heavy Metal Stress: Morphological Responses to Molecular Mechanisms

Melatonin Modulates Plant Tolerance to Heavy Metal Stress: Morphological Responses to Molecular Mechanisms

ROS and NO Phytomelatonin-Induced Signaling Mechanisms under Metal Toxicity in Plants: A Review

ROS and NO Phytomelatonin-Induced Signaling Mechanisms Under Metal Toxicity in Plants: A Review

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