Melatonin mitigates cold-induced damage to pepper seedlings by promoting redox homeostasis and regulating antioxidant profiling

Altaf, Muhammad Ahsan; Hao, Yuanyuan; Shu, Huangying; Jin, Weiheng; Chen, Chuhao; Li, Lin; Mumtaz, Muhammad Ali; Fu, Huizhen; Cheng, Shanhan; Zhu, Guopeng; Wang, Zhiwei

doi:10.1016/j.hpj.2023.02.006

Cited by 11 publications

(3 citation statements)

References 65 publications

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“…In this study, the free proline content of three desert plants was significantly increased after IAA immersion and application of exogenous melatonin to resist the damage caused by salt damage. Muhammad Ahsan Altaf et al 59 showed in a recent study that peppers exposed to CS showed a significant increase in proline levels, while MT application further increased the accumulation of proline in pepper leaves. Xian Xulin et al 60 found that exogenous MT treatment significantly enhanced the salinity-alkali tolerance, improved osmoregulation ability, and reduced cell membrane damage of M9-T337 seedlings, and the contents of Pro, SS, SP and St in the leaves of M9-T337 seedlings were further increased after the application of exogenous MT under saline-alkali stress.…”

Section: Disscussionmentioning

confidence: 99%

Synergistic effects of exogenous IAA and melatonin on seed priming and physiological biochemistry of three desert plants in saline-alkali soil

Zhang,

Wang,

et al. 2024

Plant Signaling & Behavior

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To investigate the synergistic effect of IAA and melatonin (MT) on three plants to alleviate the effects of salt damage on plants, we aim to determine the optimal concentrations of exogenous hormone treatments that improve salinity resistance for each species. In this experiment, three desert plants, Sarcozygium xanthoxylon , Nitraria tangutorum , and Ammopiptanthus mongolicus , which are common in Wuhai City, were used as plant materials. Two time periods (12 h,24 h) of exogenous hormone IAA (100 μmol/L) and exogenous melatonin concentration (0, 100, 200, 300 μmol/L) were used to treat the three desert plants in saline soil under different conditions of exogenous IAA and exogenous melatonin. The results indicate that under different concentrations of exogenous IAA and melatonin, the germination rate and vigor of the three desert plant species in saline-alkaline soil improved. However, as the concentration of melatonin increased, the germination rate and vigor of these desert plants were inhibited. Whereas, plant height, root length, leaf length, fresh weight, dry weight, and root vigor of the three desert plants were alleviated under different conditions of exogenous IAA and exogenous melatonin. under the action of two exogenous hormones, the low concentration of melatonin decreased their malondialdehyde content and increased their proline content. As melatonin levels increased, the activity of antioxidant enzymes also rose initially, followed by a subsequent decline. This study highlights the synergistic effects of two exogenous hormones on the critical role of cell osmomodulators and antioxidant enzyme activity in combating salinity damage in three desert plants.

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Section: Disscussionmentioning

confidence: 99%

Synergistic effects of exogenous IAA and melatonin on seed priming and physiological biochemistry of three desert plants in saline-alkali soil

Zhang,

Wang,

et al. 2024

Plant Signaling & Behavior

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“…Seeds treated with phytomelatonin promote the yield of early planted spring maize by stimulating early seedling growth under cold stress [3]. Altaf et al [82] demonstrated that phyto-melatonin reduced the adverse effects of cold stress in pepper by recovering root traits, plant growth, exchange of gases, pigment molecules, and related gene expression as compared to the non-cold stress plants. Phyto-melatonin increases the crop's growth and yield by improving its morpho-physiological and molecular activities under cold stress.…”

Section: Cold Stressmentioning

confidence: 99%

Melatonin Role in Plant Growth and Physiology under Abiotic Stress

Ahmad,

Zhu,

Zhou

et al. 2023

IJMS

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Phyto-melatonin improves crop yield by mitigating the negative effects of abiotic stresses on plant growth. Numerous studies are currently being conducted to investigate the significant performance of melatonin in crops in regulating agricultural growth and productivity. However, a comprehensive review of the pivotal performance of phyto-melatonin in regulating plant morpho-physiological and biochemical activities under abiotic stresses needs to be clarified. This review focused on the research on morpho-physiological activities, plant growth regulation, redox status, and signal transduction in plants under abiotic stresses. Furthermore, it also highlighted the role of phyto-melatonin in plant defense systems and as biostimulants under abiotic stress conditions. The study revealed that phyto-melatonin enhances some leaf senescence proteins, and that protein further interacts with the plant’s photosynthesis activity, macromolecules, and changes in redox and response to abiotic stress. Our goal is to thoroughly evaluate phyto-melatonin performance under abiotic stress, which will help us better understand the mechanism by which phyto-melatonin regulates crop growth and yield.

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“…These leaves had good leaf color, similar size dimensions, and were free from diseases and insect pests [21]. The CIRAS-3 PP Systems photosynthetic analyzer (Amesbury, MA, USA) was used to measure the light response indices of the leaves [22,23]. A PLC3 universal leaf cuvette light source leaf chamber was utilized, and 10 gradients ranging from 0 to 2500 µmol•m −2 •s −1 (2500, 2000, 1500, 1000, 750, 500, 300, 150, 75, 0 µmol•m −2 •s −1 ) were set by the light source.…”

Section: Experimental Plant Materialsmentioning

confidence: 99%

Performance Evaluation of New Table Grape Varieties under High Light Intensity Conditions Based on the Photosynthetic and Chlorophyll Fluorescence Characteristics

He,

Yadav,

Bai

et al. 2023

Horticulturae

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The evaluation of photosynthetic characteristics of plants is important for the success rate of germplasm introduction. To select grape varieties with higher adaptability and trait performance, this experiment is aimed at evaluating and comparing the photosynthetic indices, chlorophyll fluorescence parameters, photosynthetic pigment content, and leaf characteristics of five Chinese hybrid varieties. The results showed that under high light intensity stress, the leaf growth of ‘Ruidu Cuixia’ was most affected and its specific leaf weight was the lowest, while ‘Jing Hongbao’ had the highest chlorophyll content. The maximum net photosynthetic rate (Pnmax), maximum light quantum yield (Fv/Fm), and apparent quantum efficiency (AQE) were different among varieties. It was reported that the ‘Ruidu Zaohong’ variety had the highest Pnmax. ‘Ruidu Wuheyi’ was found to have the highest Fv/Fm, while the highest AQE was recorded for ‘Ruidu Cuixia’, with intercellular CO2 concentration (Ci) and stomatal conductance (gs) at 292.56 μmol·mol−1, 766.56 mmol·m−2·s−1, and 66.8 μmol·m−2·s−1, respectively. The indices of ABS/CSm, TRo/CSm, and DIo/CSm were significantly different among varieties, and these indices of ‘Ruidu Zaohong’ were the highest. Pn was positively correlated with Ci and Tr, gs were positively correlated with Fv and TRo/CSm. The specific leaf area was negatively correlated with Fv/Fm and ΦDIo. The results of the principal component analysis and TOPSIS comprehensive evaluation showed that ‘Jing Hongbao’ and ‘Ruidu Cuixia’ performed best. Overall, the measurement of the photosynthetic characteristics of the plants during the growing period provided valuable data for the varietal introduction strategies. The better photosynthetic performance of ‘Jing Hongbao’ and ‘Ruidu Cuixia’ indicates more adaptability to the long day, high light intensity, and the high-temperature climate of Xinjiang.

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Melatonin mitigates cold-induced damage to pepper seedlings by promoting redox homeostasis and regulating antioxidant profiling

Cited by 11 publications

References 65 publications

Synergistic effects of exogenous IAA and melatonin on seed priming and physiological biochemistry of three desert plants in saline-alkali soil

Synergistic effects of exogenous IAA and melatonin on seed priming and physiological biochemistry of three desert plants in saline-alkali soil

Melatonin Role in Plant Growth and Physiology under Abiotic Stress

Performance Evaluation of New Table Grape Varieties under High Light Intensity Conditions Based on the Photosynthetic and Chlorophyll Fluorescence Characteristics

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