Melatonin enhanced low-temperature combined with low-light tolerance of pepper (Capsicum annuum L.) seedlings by regulating root growth, antioxidant defense system, and osmotic adjustment

Li, Jing; Xie, Jianming; Yu, Jing; Lyv, Jian; Zhang, Junfeng; Ding, Dongxia; Li, Nenghui; Zhang, Jing; Bakpa, Emily Patience; Yang, Yan; Niu, Tianhang; Gao, Feng

doi:10.3389/fpls.2022.998293

Cited by 11 publications

(5 citation statements)

References 87 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Under ST and WL, the qN levels of P. tobira seedlings at Zhejiang were increased, implying that plants may safeguard the photosynthetic organs against damage caused by excessive light energy absorption.It has been demonstrated that melatonin enhances chlorophyll content and light energy conversion e ciency of PSII through the reprogramming of polyamine and ethylene metabolism under stressful conditions in alfalfa and cucumber(Zhang et al 2019;Jahan et al 2021;Liu et al 2022). Our results indicated that melatonin levels of P. tobira seedlings were reduced under ST, WL and ST + WL, compared to the controls, which was consistent with a previous study(Li et al 2022). These results suggested that the interaction between melatonin and photosynthetic pigments may confer P. tobira salt and waterlogging stresses.…”

supporting

confidence: 92%

Adaptive changes of ROS/RNS redox and melatonin synthesis under salt and waterlogging stresses in Pittosporum tobira

Pan,

Wang,

Teng

et al. 2024

Preprint

View full text Add to dashboard Cite

Plants have evolved a variety of complex mechanisms to resist the environmental factors including salt and waterlogging stresses. In this study, we described adaptive changes of Pittosporum tobira toward salt and/or waterlogging stresses by mediating ROS (reactive oxygen species)/RNS (reactive nitrogen species) redox and melatonin synthesis. When the P. tobira seedlings were subjected to salt stress, waterlogging stress, and salt-waterlogging stress, both the photosynthetic capacity and antioxidant capacity were significantly inhibited, accompanying with the alterations of MDA, H2O2, O2− and NO levels and melatonin metabolism. These observations were correlated with the changes in the activities of antioxidant enzymes (SOD, CAT, POD and APX) and melatonin biosynthetic enzymes (MEL, TDC, SNAT, SER, and 5-MT) as wells as in the expression of their encoding genes. Lower melatonin content was found in the seedlings treated by salt-waterlogging stress than in those treated by salt or waterlogging stress. Furthermore, the tolerances of the seedlings grown at Zhejiang province to salt and waterlogging stress were stronger than those grown at Fujian province. Our findings suggested that the MEL/ROS/RNS redox network induced by salt stress, waterlogging stress, salt-waterlogging stress may be a crucial mechanism for coping with adverse conditions in P. tobira.

show abstract

supporting

confidence: 92%

Adaptive changes of ROS/RNS redox and melatonin synthesis under salt and waterlogging stresses in Pittosporum tobira

Pan,

Wang,

Teng

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…Melatonin plays an integral role in regulating including plant growth, seed germination, flowering, senescence (Ibrahim et al, 2020;Nawaz et al, 2021;Sun et al, 2021). Moreover, many previous studies have confirmed that exogenous applied melatonin can alleviate the harmful effects of different stresses in many plant species (Zahedi et al, 2020;Nawaz et al, 2021;Sun et al, 2021;Li et al, 2022), because it is responsible for stimulating physiochemical responses against environmental conditions melatonin enhances photosynthesis, growth, carbon fixation. It also modulates gene expression related to plant hormones and regulates stress-specific genes (Nawaz et al, 2021).…”

Section: Introductionmentioning

confidence: 91%

Improvement of Tomato Performance Under Low Temperature Stress Using Some Bio-Stimulants Compared With Low Tunnel System

El-Sayed,

Hanafy,

Mohamed

2024

Zagazig Journal of Agricultural Research

View full text Add to dashboard Cite

Chilling injury is one of climate change challenges which effect negatively on plant growth of warm season crops. Low temperatures can be overcome by utilization high cost protected cultivation systems such as low tunnels. Open field experiment was conducted in Private farm, located in Mansouria District, at North of Giza Governorate, Egypt during two winter seasons of 2019/ 2020 and 2020/2021 to study the response of tomato cv. Platinum under low temperature conditions for foliar spray with: 1) Melatonin (100 μM); 2) acetyl salicylic acid (178 mM); 3) potassium silicate (250 mg/L); 4) the mix between acetyl salicylic acid (178 mM) and potassium silicate (250 mg/L); 5) water (control) compared with low tunnel and their effects on agronomic, quality traits and productivity with using of Auxin application as common agricultural recommendation in winter season. Our results revealed that plants of control showed the highest significant injury index on leaves and percentage of injury. All treatments reduced of injury index and injury %, especially the tunnel and the mix treatment. The mix between acetyl salicylic acid and potassium silicate significantly enhanced the agronomic traits such as plant height, number of branches, leaf area, shoot fresh weight and number of leaves/plants. All cold mitigators significantly decreased total sugars, proline and total phenols, except acetyl salicylic acid in total sugars in first season, melatonin in proline in first season and potassium silicate in phenols. The highest lycopene and TSS were recorded in the tunnel and the mix treatment, while the highest Vit C were detected for potassium silicate and followed by the Mix treatment then the tunnel. Except melatonin application in first season only, all cold alleviating compounds clearly increased fruit set, and total yield. Tunnel in first season only and the mix treatment in both seasons produced the highest significant early yield, total yield and number of fruits/ plants which were higher in fruit set percentage than other treatments. We suggested using the Mix treatment as low-cost alternative for low tunnels for tomato production under low temperature condition.

show abstract

“…When plants are under salinity stress, the root system first receives the stress signal and transmits this adverse effect to the stem and leaves, ultimately affecting the plant's growth and development [30]. Numerous studies have shown that MT significantly alleviates the inhibition of plant growth due to abiotic stresses [30][31][32]. In legumes, MT could improve alfalfa morphology to enhance salt tolerance through increasing plant height, root length, fresh dry weight, and chlorophyll content [33].…”

Section: Mt Treatment Effect On Phenotypic Characteristicsmentioning

confidence: 99%

The Physiological Mechanism of Melatonin Enhancing the Tolerance of Oat Seedlings under Saline–Alkali Stress

Wang,

Liang,

Xiang

et al. 2023

Agronomy

View full text Add to dashboard Cite

Exogenous melatonin (MT) regulates plant growth and mitigates stress in response to stress. To analyze the machinery of exogenous melatonin, which improves salt and alkaline tolerance in oats, MT’s function was identified in the oat seed germination stage in our previous study. In this study, morphogenesis, photosynthetic physiology, hormone levels, and ion homeostasis were evaluated using the same MT treatment concentration. The results revealed that compared to the S45 treatment, the 100 μmol·L−1 MT treatment efficiently increased the seedling height and main root length of oat seedlings; promoted secondary root development; enhanced the root volume and root surface area; maintained a higher photosynthetic pigment content (carotenoids; chlorophyll a; chlorophyll b); raised the leaf photosynthetic rate (Pn), intercellular CO2 concentration (Ci), conductance to H2O (Gs), and transpiration rate (Tr); enhanced the light energy absorption and conversion of leaves; increased the leaf GA3, Tryptamine (TAM), and IAA contents; and decreased ABA levels. Hierarchical cluster analysis revealed that MT treatment also increased the contents of P, K, Ca, Mn, Cu, Mg, Fe, Zn, Mo, Cd, Al, Se, Ni, Co, and Ti; decreased the Na/K ratio; and maintained cellular ionic homeostasis in oat seedlings under saline–alkali stress, as compared with the untreated group. These findings showed that MT treatment enhanced the adaptation of oat to saline–alkali stress through regulating the physiological process of seedling growth. This suggests that MT plays a different role in improving saline–alkali tolerance in the germination and seedling stages of oat.

show abstract

Melatonin enhanced low-temperature combined with low-light tolerance of pepper (Capsicum annuum L.) seedlings by regulating root growth, antioxidant defense system, and osmotic adjustment

Cited by 11 publications

References 87 publications

Adaptive changes of ROS/RNS redox and melatonin synthesis under salt and waterlogging stresses in Pittosporum tobira

Adaptive changes of ROS/RNS redox and melatonin synthesis under salt and waterlogging stresses in Pittosporum tobira

Improvement of Tomato Performance Under Low Temperature Stress Using Some Bio-Stimulants Compared With Low Tunnel System

The Physiological Mechanism of Melatonin Enhancing the Tolerance of Oat Seedlings under Saline–Alkali Stress

Contact Info

Product

Resources

About