Melatonin Promotes Seed Germination via Regulation of ABA Signaling Under Low Temperature Stress in Cucumber

Zhang, Haijun; Qiu, Yanhong; Ji, Yanhai; Wu, Xuan; Xiao, Xu; Wu, Ping

doi:10.1007/s00344-022-10698-y

Cited by 12 publications

(13 citation statements)

References 59 publications

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“…It acts as an antioxidant and detoxifies ROS and RNS by enhancing the antioxidant enzyme activity under stress conditions [13]. Melatonin act as a promoter of seed germination [14] and lateral root formation [15], regulates flowering [16], and delays leaf senescence [17] to manage and control plant growth and development under challenging environments.…”

Section: Introductionmentioning

confidence: 99%

Melatonin Enhances the Photosynthesis and Antioxidant Enzyme Activities of Mung Bean under Drought and High-Temperature Stress Conditions

Kuppusamy,

Alagarswamy,

Karuppusami

et al. 2023

Plants

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Mung bean, a legume, is sensitive to abiotic stresses at different growth stages, and its yield potential is affected by drought and high-temperature stress at the sensitive stage. Melatonin is a multifunctional hormone that plays a vital role in plant stress defense mechanisms. This study aimed to evaluate the efficiency of melatonin under individual and combined drought and high-temperature stress in mung bean. An experiment was laid out with five treatments, including an exogenous application of 100 µM melatonin as a seed treatment, foliar spray, and a combination of both seed treatment and foliar spray, as well as absolute control (ambient condition) and control (stress without melatonin treatment). Stresses were imposed during the mung bean’s reproductive stage (31–40 DAS) for ten days. Results revealed that drought and high-temperature stress significantly decreased chlorophyll index, Fv/Fm ratio, photosynthetic rate, stomatal conductance, and transpiration rate through increased reactive oxygen species (ROS) production. Foliar application of melatonin at 100 µM concentration enhanced the activity of antioxidant enzymes such as superoxide dismutase, catalase, and ascorbate peroxidase and the concentration of metabolites involved in osmoregulation and ion homeostasis; thereby, it improves physiological and yield-related traits in mung bean under individual and combined stress at the reproductive stage.

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Section: Introductionmentioning

confidence: 99%

Melatonin Enhances the Photosynthesis and Antioxidant Enzyme Activities of Mung Bean under Drought and High-Temperature Stress Conditions

Kuppusamy,

Alagarswamy,

Karuppusami

et al. 2023

Plants

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“…236 MEL pretreatment improved seed vigor (evidenced by tetrazolium test) and biosynthesis of GAs while reduced MDA contents and ABA biosynthesis, thus increased SG under CS. 237 In conclusion, MEL interacts with ROS/RNS to regulate SG, however the interactive role of MEL with ROS/RNS also depends on the nature of ROS either as oxidative or as signaling. 218 Moreover, growth conditions, concentration of MEL applied, and plant species may influence such interaction.…”

Section: Crosstalk Between Mel and Ros/rnsmentioning

confidence: 89%

“…Likewise, MEL‐NO crosstalk controls adventitious root development in tomato, which is important for abiotic stress tolerance 236 . MEL pretreatment improved seed vigor (evidenced by tetrazolium test) and biosynthesis of GAs while reduced MDA contents and ABA biosynthesis, thus increased SG under CS 237 . In conclusion, MEL interacts with ROS/RNS to regulate SG, however the interactive role of MEL with ROS/RNS also depends on the nature of ROS either as oxidative or as signaling 218 .…”

Section: Mel‐induced Common Responses For Regulating Sg Under Abiotic...mentioning

confidence: 99%

“…However, ABA cannot always be considered as a “universal” stress hormone since it acts as a negative regulator of fluoride tolerance which is more tightly regulated in rice in an ABA‐independent manner 245 . However, MEL decreases ABA contents, plausibly by preventing the binding of PYL, to protein phosphatase type 2C and blocking the activation of subfamily 2 of SNF1‐related kinase with concomitant abolishing of the phosphorylation of the ABA‐responsive element‐binding factor, which resultantly may increase SG 237 . Another study showed that MEL pretreatment improved SG in suppressor of the G2 allele of skp1 ( OsSGT1 ) overexpression rice lines under chromium stress 246 .…”

Section: Mel‐induced Common Responses For Regulating Sg Under Abiotic...mentioning

confidence: 99%

“…245 However, MEL decreases ABA contents, plausibly by preventing the binding of PYL, to protein phosphatase type 2C and blocking the activation of subfamily 2 of SNF1-related kinase with concomitant abolishing of the phosphorylation of the ABA-responsive element-binding factor, which resultantly may increase SG. 237 Another study showed that MEL pretreatment improved SG in suppressor of the G2 allele of skp1 (OsSGT1) overexpression rice lines under chromium stress. 246 However, the restored expression of OsSGT1 could not rescue the weak germination of sgt1-1abi5, but the expression of OsABI5 significantly restored the MELameliorated SG and the expression of ascorbate 3) NO (RNS) increases endogenous MEL levels via triggering its biosynthesis, which in return increases endogenous NO level by triggering the activity of NOS like and NR for NO biosynthesis, thus making MEL-NO loop.…”

Section: Catalasementioning

confidence: 99%

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Melatonin as a key regulator in seed germination under abiotic stress

Wang,

Tanveer,

Wang

et al. 2024

Journal of Pineal Research

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Seed germination (SG) is the first stage in a plant's life and has an immense importance in sustaining crop production. Abiotic stresses reduce SG by increasing the deterioration of seed quality, and reducing germination potential, and seed vigor. Thus, to achieve a sustainable level of crop yield, it is important to improve SG under abiotic stress conditions. Melatonin (MEL) is an important biomolecule that interplays in developmental processes and regulates many adaptive responses in plants, especially under abiotic stresses. Thus, this review specifically summarizes and discusses the mechanistic basis of MEL‐mediated SG under abiotic stresses. MEL regulates SG by regulating some stress‐specific responses and some common responses. For instance, MEL induced stress specific responses include the regulation of ionic homeostasis, and hydrolysis of storage proteins under salinity stress, regulation of C‐repeat binding factors signaling under cold stress, starch metabolism under high temperature and heavy metal stress, and activation of aquaporins and accumulation of osmolytes under drought stress. On other hand, MEL mediated regulation of gibberellins biosynthesis and abscisic acid catabolism, redox homeostasis, and Ca2+ signaling are amongst the common responses. Nonetheless factors such as endogenous MEL contents, plant species, and growth conditions also influence above‐mentioned responses. In conclusion, MEL regulates SG under abiotic stress conditions by interacting with different physiological mechanisms.

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Melatonin as a Key Factor for Regulating and Relieving Abiotic Stresses in Harmony with Phytohormones in Horticultural Plants — a Review

Ali,

Nasser,

Abdelhamid

et al. 2023

J Soil Sci Plant Nutr

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Melatonin was found in plants in the late 1990s, but its function, signaling, and interaction with other phytohormones still unclear. Melatonin research in plants has increased substantially in recent years, including reports on the impact of this putative plant hormone under biotic and abiotic stress situations. Temperature extremes, salt, drought, hypoxia or anoxia, nutrient deficiency, herbicides, UV radiation stress, and heavy metal toxicity are all important obstacles to horticulture crop production worldwide. To deal with these environmental challenges, plants have evolved complex signaling networks. Phytohormones are essential for controlling plant growth, development, and stress responses. Melatonin, a pleiotropic chemical present in a variety of species, has recently emerged as a powerful regulator of plant abiotic stress tolerance. The purpose of this review is to investigate the interplay between melatonin and phytohormones in the control of abiotic stress responses in horticultural crops. We explore the interactions of melatonin with several phytohormones under various abiotic stresses.

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Melatonin Promotes Seed Germination via Regulation of ABA Signaling Under Low Temperature Stress in Cucumber

Cited by 12 publications

References 59 publications

Melatonin Enhances the Photosynthesis and Antioxidant Enzyme Activities of Mung Bean under Drought and High-Temperature Stress Conditions

Melatonin Enhances the Photosynthesis and Antioxidant Enzyme Activities of Mung Bean under Drought and High-Temperature Stress Conditions

Melatonin as a key regulator in seed germination under abiotic stress

Melatonin as a Key Factor for Regulating and Relieving Abiotic Stresses in Harmony with Phytohormones in Horticultural Plants — a Review

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