Melatonin and Abiotic Stress Tolerance in Crop Plants

Colombage, Roshira; Singh, Mohan B.; Bhalla, Prem L.

doi:10.3390/ijms24087447

Cited by 51 publications

(14 citation statements)

References 147 publications

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“…Also, SIRT3 is upregulated by oxidative stress in both mammalian as well as in invertebrate neurons which in turn stimulates the detoxification of ROS due to its capacity to promote the activity of SOD ( 106 ). This latter observation suggests the possibility that oxidative stress is consequential in the reported compensatory rise in subcellular melatonin production, as commonly observed in plants and which has also been reported in algae ( 97 , 107 ), which in turn upregulates the SIRT3/FOXO/SOD2 pathway, thereby helping to maintain oxidative homeostasis under elevated oxidative stress conditions. This would obviously be a very important function of Source # 2 melatonin in animals.…”

Section: Extrapineal Melatonin (Source # 2)supporting

confidence: 70%

Dual sources of melatonin and evidence for different primary functions

Reiter,

Sharma,

Tan

et al. 2024

Front. Endocrinol.

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This article discusses data showing that mammals, including humans, have two sources of melatonin that exhibit different functions. The best-known source of melatonin, herein referred to as Source #1, is the pineal gland. In this organ, melatonin production is circadian with maximal synthesis and release into the blood and cerebrospinal fluid occurring during the night. Of the total amount of melatonin produced in mammals, we speculate that less than 5% is synthesized by the pineal gland. The melatonin rhythm has the primary function of influencing the circadian clock at the level of the suprachiasmatic nucleus (the CSF melatonin) and the clockwork in all peripheral organs (the blood melatonin) via receptor-mediated actions. A second source of melatonin (Source # 2) is from multiple tissues throughout the body, probably being synthesized in the mitochondria of these cells. This constitutes the bulk of the melatonin produced in mammals and is concerned with metabolic regulation. This review emphasizes the action of melatonin from peripheral sources in determining re-dox homeostasis, but it has other critical metabolic effects as well. Extrapineal melatonin synthesis does not exhibit a circadian rhythm and it is not released into the blood but acts locally in its cell of origin and possibly in a paracrine matter on adjacent cells. The factors that control/influence melatonin synthesis at extrapineal sites are unknown. We propose that the concentration of melatonin in these cells is determined by the subcellular redox state and that melatonin synthesis may be inducible under stressful conditions as in plant cells.

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Section: Extrapineal Melatonin (Source # 2)supporting

confidence: 70%

Dual sources of melatonin and evidence for different primary functions

Reiter,

Sharma,

Tan

et al. 2024

Front. Endocrinol.

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“…Melatonin significantly influences the plant system’s expression of stress-responsive genes ( Ali et al., 2023 ; Colombage et al., 2023 ). These genes often directly involved in the plant system’s defense mechanisms.…”

Section: Melatonin: Roles In Abiotic Stress Responsesmentioning

confidence: 99%

Melatonin interaction with abscisic acid in the regulation of abiotic stress in Solanaceae family plants

Ali,

Pan,

Liu

et al. 2023

Front. Plant Sci.

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Solanaceous vegetable crops are cultivated and consumed worldwide. However, they often confront diverse abiotic stresses that significantly impair their growth, yield, and overall quality. This review delves into melatonin and abscisic acid (ABA) biosynthesis and their roles in abiotic stress responses. It closely examines the intricate interplay between melatonin and ABA in managing stress within plants, revealing both collaborative and antagonistic effects and elucidating the underlying molecular mechanisms. Melatonin and ABA mutually influence each other’s synthesis, metabolism and that of other plant hormones, a key focus of this study. The study highlights melatonin’s role in aiding stress management through ABA-dependent pathways and key genes in the melatonin-ABA interaction. Specifically, melatonin downregulates ABA synthesis genes and upregulates catabolism genes, leading to reduced ABA levels. It also directly scavenges H2O2, enhancing antioxidant enzyme activities, thereby underscoring their collaborative role in mediating stress responses. Moreover, the interplay between melatonin and ABA plays an essential role in multiple physiological processes of plants, including stomatal behaviors, wax accumulation, delay leaf senescence, seed germination, and seedlings growth, among others. Recognizing these relationships in Solanaceae vegetable crops holds great importance for improving agricultural practices and crop quality. In summary, this review offers a comprehensive overview of recent studies on the melatonin and ABA interplay, serving as a valuable resource for researchers and breeders dedicated to fortifying crop resilience and productivity within challenging environments.

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“…H 2 O 2 has strong oxidability and toxicity when its content too high 30 . AsA, also known as vitamin C, 31 has strong reducibility and can remove peroxidation substances in organisms.…”

Section: Resultsmentioning

confidence: 99%

Stereoselectivity of paclobutrazol enantiomers to oxidative stress in wheat

Yang,

Li,

Liang

et al. 2024

Chirality

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Chiral pesticides have the special chiral structures, so enantioselective biological effects are usually observed in living organisms. Current study used paclobutrazol as a case study and explored the enantioselective degradation and oxidative stress effect on wheat. The results demonstrated that the degradation of R‐paclobutrazol was faster than S‐paclobutrazol significantly and improved the content of MDA and O2− in wheat plants, which proved that the R‐paclobutrazol induced oxidative damage in wheat, showing selective biological effects, and S‐paclobutrazol was friendly to wheat. This study provided a theoretical basis for the selective activity of chiral pesticides and the development of chiral pesticide monomers.

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Melatonin and Abiotic Stress Tolerance in Crop Plants

Cited by 51 publications

References 147 publications

Dual sources of melatonin and evidence for different primary functions

Dual sources of melatonin and evidence for different primary functions

Melatonin interaction with abscisic acid in the regulation of abiotic stress in Solanaceae family plants

Stereoselectivity of paclobutrazol enantiomers to oxidative stress in wheat

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