Melatonin in Plant Defense against Abiotic Stress

Rehaman, Abdul; Mishra, Awdhesh Kumar; Ferdose, Asma; Per, Tasir S.; Hanief, Mohd; Jan, Arif Tasleem; Asgher, Mohd

doi:10.3390/f12101404

Cited by 40 publications

(19 citation statements)

References 210 publications

(291 reference statements)

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“…The antioxidation of MT partially explains the fact that it enhances the ability of plants to withstand abiotic stress [ 78 ], and scholars believe that MT is a candidate drug for the natural biological stimulation treatment of field crops [ 79 ]. In recent years, the discussion about MT has mainly focused on the fact that MT provides a wide range of stress regulation in plants and the perfection of the evidence of MT as a plant hormone [ 27 , 80 , 81 ]. Based on the results of this study, we believe that MT does not show stress specificity in the function of regulating plant growth; that is, the relative effect of MT on plant growth regulation is not affected by the presence of intensity of salt stress ( Figure 5 ).…”

Section: Discussionmentioning

confidence: 99%

Basic Cognition of Melatonin Regulation of Plant Growth under Salt Stress: A Meta-Analysis

Yan

Zhao

et al. 2022

Antioxidants

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Salt stress severely restricts the growth of plants and threatens the development of agriculture throughout the world. Worldwide studies have shown that exogenous melatonin (MT) can effectively improve the growth of plants under salt stress. Through a meta-analysis of 549 observations, this study first explored the effects of salt stress characteristics and MT application characteristics on MT regulated plant growth under salt stress. The results show that MT has a wide range of regulatory effects on plant growth indicators under salt stress, of which the regulatory effect on root indexes is the strongest, and this regulatory effect is not species-specific. The intensity of salt stress did not affect the positive effect of MT on plant growth, but the application effect of MT in soil was stronger than that in rooting medium. This meta-analysis also revealed that the foliar application of a concentration between 100–200 μM is the best condition for MT to enhance plant growth under salt stress. The results can inspire scientific research and practical production, while seeking the maximum improvement in plant salt tolerance under salt stress.

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Section: Discussionmentioning

confidence: 99%

Basic Cognition of Melatonin Regulation of Plant Growth under Salt Stress: A Meta-Analysis

Yan

Zhao

et al. 2022

Antioxidants

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“…The use of phytohormones and other physiologically active compounds in agricultural production is a cost-effective and environmentally safe way to increase the salt tolerance of plants. In recent years, melatonin has been shown to be highly effective as a protective molecule against the damaging effects of many abiotic factors and biopathogens [ 10 , 11 , 12 , 13 , 14 , 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Priming Potato Plants with Melatonin Protects Stolon Formation under Delayed Salt Stress by Maintaining the Photochemical Function of Photosystem II, Ionic Homeostasis and Activating the Antioxidant System

Efimova

Danilova

Zlobin

et al. 2023

IJMS

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Melatonin is among one of the promising agents able to protect agricultural plants from the adverse action of different stressors, including salinity. We aimed to investigate the effects of melatonin priming (0.1, 1.0 and 10 µM) on salt-stressed potato plants (125 mM NaCl), by studying the growth parameters, photochemical activity of photosystem II, water status, ion content and antioxidant system activity. Melatonin as a pleiotropic signaling molecule was found to decrease the negative effect of salt stress on stolon formation, tissue water content and ion status without a significant effect on the expression of Na+/H+-antiporter genes localized on the vacuolar (NHX1 to NHX3) and plasma membrane (SOS1). Melatonin effectively decreases the accumulation of lipid peroxidation products in potato leaves in the whole range of concentrations studied. A melatonin-induced dose-dependent increase in Fv/Fm together with a decrease in uncontrolled non-photochemical dissipation Y(NO) also indicates decreased oxidative damage. The observed protective ability of melatonin was unlikely due to its influence on antioxidant enzymes, since neither SOD nor peroxidase were activated by melatonin. Melatonin exerted positive effects on the accumulation of water-soluble low-molecular-weight antioxidants, proline and flavonoids, which could aid in decreasing oxidative stress. The most consistent positive effect was observed on the accumulation of carotenoids, which are well-known lipophilic antioxidants playing an important role in the protection of photosynthesis from oxidative damage. Finally, it is possible that melatonin accumulated during pretreatment could exert direct antioxidative effects due to the ROS scavenging activity of melatonin molecules.

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“…This phenomenon has profound implications for agriculture, forestry, and global food security issues. However, plants have evolved multiple regulatory pathways involving many transcription factor families to receive and respond to different stress signals [ 2 , 3 ]. Various protein families are able to regulate plant physiological processes by modifying gene expression, altering signalling, and interfering with biosynthesis to improve their adaptability [ 4 , 5 , 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

Genome-Wide Identification and Expression Analysis of the Zinc Finger Protein Gene Subfamilies under Drought Stress in Triticum aestivum

Shen

Wang

et al. 2022

Plants

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The zinc finger protein (ZFP) family is one of plants’ most diverse family of transcription factors. These proteins with finger-like structural domains have been shown to play a critical role in plant responses to abiotic stresses such as drought. This study aimed to systematically characterize Triticum aestivum ZFPs (TaZFPs) and understand their roles under drought stress. A total of 9 TaC2H2, 38 TaC3HC4, 79 TaCCCH, and 143 TaPHD were identified, which were divided into 4, 7, 12, and 14 distinct subgroups based on their phylogenetic relationships, respectively. Segmental duplication dominated the evolution of four subfamilies and made important contributions to the large-scale amplification of gene families. Syntenic relationships, gene duplications, and Ka/Ks result consistently indicate a potential strong purifying selection on TaZFPs. Additionally, TaZFPs have various abiotic stress-associated cis-acting regulatory elements and have tissue-specific expression patterns showing different responses to drought and heat stress. Therefore, these genes may play multiple functions in plant growth and stress resistance responses. This is the first comprehensive genome-wide analysis of ZFP gene families in T. aestivum to elucidate the basis of their function and resistance mechanisms, providing a reference for precise manipulation of genetic engineering for drought resistance in T. aestivum.

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Melatonin in Plant Defense against Abiotic Stress

Cited by 40 publications

References 210 publications

Basic Cognition of Melatonin Regulation of Plant Growth under Salt Stress: A Meta-Analysis

Basic Cognition of Melatonin Regulation of Plant Growth under Salt Stress: A Meta-Analysis

Priming Potato Plants with Melatonin Protects Stolon Formation under Delayed Salt Stress by Maintaining the Photochemical Function of Photosystem II, Ionic Homeostasis and Activating the Antioxidant System

Genome-Wide Identification and Expression Analysis of the Zinc Finger Protein Gene Subfamilies under Drought Stress in Triticum aestivum

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