Exogenous Melatonin Modulated Drought Stress by Regulating Physio-Biochemical Attributes and Fatty acid Profile of Sweet Cherry (Prunus avium L.)

Hojjati, Mohammad; Jahromi, Marzieh Ghanbari; Abdossi, Vahid; ‎Torkashvand, Ali Mohammadi

doi:10.1007/s00344-023-11085-x

Cited by 11 publications

(1 citation statement)

References 56 publications

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“…In contrast, antioxidants will reduce levels of (i) malondialdehyde, (ii) free radicals, and (iii) electrolyte leakage [32,33]. The effect of melatonin on crops is presented in Supplementary Table S1 [34][35][36][37][38][39][40][41][42][43][44][45][46][47]. Based on this, we hypothesize that melatonin could increase the antioxidant defense system, resulting in increased photosynthetic rate and yield.…”

Section: Introductionmentioning

confidence: 96%

Melatonin Decreases Negative Effects of Combined Drought and High Temperature Stresses through Enhanced Antioxidant Defense System in Tomato Leaves

Annadurai,

Alagarsamy,

Karuppasami

et al. 2023

Horticulturae

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In tomato (Lycopersicon esculentum L.), the effects of combined drought (D) and high temperature (HT) stress during the flowering stage had not been studied in detail. Therefore, this study was conducted with an objective of quantifying the effects of foliar spray of melatonin under individual and combined drought and HT stress. At flowering stage, D stress was imposed through withholding irrigation, while HT stress was imposed through exposing the plants to ambient temperature (AT) along with an increase of +5 °C. Under D + HT, plants were first subjected to drought followed by a + 5 °C increase in AT. The duration of individual or combined stress was ten days. At 80% available soil moisture, 100 µM melatonin was sprayed on D, HT, or D + HT treated plants. Among the stresses, D + HT stress increased the thylakoid membrane damage and decreased the photosynthetic rate and fruit yield more than D or HT stress. Foliar spray of 100 µM melatonin produced decreased thylakoid membrane damage [D: 31%, HT: 26%, and D + HT: 18%] and increased antioxidant enzyme, viz., superoxide dismutase, catalase, peroxidase, ascorbate peroxidase, and glutathione reductase, activity over stress-control plants. The photosynthetic rate [D: 24%, HT: 22%, and D + HT: 19%] and fruit yield [D: 32%, HT: 23%, and D + HT: 16%] were increased over stress-control plants. Hence, it is evident that the increased photosynthetic rate and fruit yield in D + HT and 100 µM melatonin-sprayed plants may be associated with an increased antioxidant defense system. Melatonin as a novel biostimulator has a great potential in scavenging free radicals through increased antioxidant activity, which shields the photosynthetic membrane from damage and therefore helps in stress mitigation.

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Section: Introductionmentioning

confidence: 96%

Melatonin Decreases Negative Effects of Combined Drought and High Temperature Stresses through Enhanced Antioxidant Defense System in Tomato Leaves

Annadurai,

Alagarsamy,

Karuppasami

et al. 2023

Horticulturae

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Variability in strawberry tunnels impacts fruit quality and limits melatonin effects

Arabia,

Pallarés,

Munné‐Bosch

et al. 2024

J Sci Food Agric

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BACKGROUNDFluctuations in environmental conditions within fields and crop plant performance can greatly affect production and quality standards. These factors are particularly relevant for producers, who require sustained optimal production to profit from small margins. Fluctuations might be exacerbated at the end of the crop season, where neither of the aforementioned factors are optimal. In the present integrated study, we assess strawberries' nutritional quality and the impact of harvest timing, tunnel conditions and inter‐individual variability in a Mediterranean production tunnel divided into blocks, where two harvests were performed 3 weeks apart. In addition, the effects of sprayed melatonin at the end of productive season were also evaluated.RESULTSEnd‐season harvesting negatively impacted fruit hydration, antioxidant capacity and ripening‐related hormones in strawberry fruits. Additionally, tunnel distribution influenced fruit nutritional quality, with light radiation being the main variable factor disturbing antioxidant contents. Nutrients exhibited high inter‐individual plant variability, accounting for 20% variation, and were strongly correlated with fruit hydration and ripening‐related phytohormones. Finally, melatonin applications affected neither fruit production, nor nutritional parameters, for which the effects were masked by the intrinsic strawberry variability. Overall, the results underline the limitations of this type of application for field implementation.CONCLUSIONFruit quality variation in strawberry fields is explained by environmental and inter‐individual variability. Likewise, the implementation of regulatory molecules such as melatonin in field applications relies on crop homogeneity and might have limited applicability in heterogeneous productive systems. Consequently, identifying and reducing microclimate variability in productive fields is paramount for advancing agricultural practices to uphold unwavering standards on fruit quality. © 2024 The Author(s). Journal of the Science of Food and Agriculture published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.

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Enhancing drought stress tolerance in horticultural plants through melatonin-mediated phytohormonal crosstalk

Dzinyela,

Hwarari,

Opoku

et al. 2024

Plant Cell Rep

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Exogenous Melatonin Modulated Drought Stress by Regulating Physio-Biochemical Attributes and Fatty acid Profile of Sweet Cherry (Prunus avium L.)

Cited by 11 publications

References 56 publications

Melatonin Decreases Negative Effects of Combined Drought and High Temperature Stresses through Enhanced Antioxidant Defense System in Tomato Leaves

Melatonin Decreases Negative Effects of Combined Drought and High Temperature Stresses through Enhanced Antioxidant Defense System in Tomato Leaves

Variability in strawberry tunnels impacts fruit quality and limits melatonin effects

Enhancing drought stress tolerance in horticultural plants through melatonin-mediated phytohormonal crosstalk

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