Melatonin-mediated photosynthetic performance of tomato seedlings under high-temperature stress

Jahan, Mohammad Shah; Guo, Shirong; Sun, Jian; Shu, Sheng; Wang, Yu; El-Yazied, Ahmed Abou; Alabdallah, Nadiyah M.; Hikal, Mohamed; Mohamed, M. H. M.; Ibrahim, Mohamed; Hasan, Md. Mahadi

doi:10.1016/j.plaphy.2021.08.002

Cited by 137 publications

(96 citation statements)

References 63 publications

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“…In this study, we found that the Fv/Fm, qP, Y(II), and ETR(II) indexes of HTH-sensitive ‘JIN TAI LANG’ variety decreased under HTH stress and decreased rapidly with the extension of stress days ( Figure 5 ). The results showed that under the HTH stress, the photosynthetic activity of the photosystem II reaction center in the open state of the ‘JIN TAI LANG’ variety was lower, the light energy efficiency captured by the open PSII reaction center was lower, the maximum light energy conversion efficiency and actual light energy conversion efficiency were significantly affected, and the relative electron transfer rate of photosystem II was slower, which was consistent with the conclusion of previous studies [ 52 ]. The NPQ index of the two cultivars also decreased gradually under stress, indicating that the extremely HTHstress resulted in the destruction of the photosynthetic structure, reduced the photoprotective ability to dissipate excess light energy as heat, and gradually lost the ability of heat dissipation [ 53 ].…”

Section: Discussionsupporting

confidence: 90%

Physiological and Transcriptomic Analysis Reveals the Responses and Difference to High Temperature and Humidity Stress in Two Melon Genotypes

Weng

Rehman

et al. 2022

IJMS

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Due to the frequent occurrence of continuous high temperatures and heavy rain in summer, extremely high-temperature and high-humidity environments occur, which seriously harms crop growth. High temperature and humidity (HTH) stress have become the main environmental factors of combined stress in summer. The responses of morphological indexes, physiological and biochemical indexes, gas exchange parameters, and chlorophyll fluorescence parameters were measured and combined with chloroplast ultrastructure and transcriptome sequencing to analyze the reasons for the difference in tolerance to HTH stress in HTH-sensitive ‘JIN TAI LANG’ and HTH-tolerant ‘JIN DI’ varieties. The results showed that with the extension of stress time, the superoxide dismutase (SOD), peroxidase (POD), and ascorbate peroxidase (APX) activities of the two melon varieties increased rapidly, the leaf water content increased, and the tolerant varieties showed stronger antioxidant capacity. Among the sensitive cultivars, Pn, Fv/Fm, photosystem II, and photosystem I chlorophyll fluorescence parameters were severely inhibited and decreased rapidly with the extension of stress time, while the HTH-tolerant cultivars slightly decreased. The cell membrane and chloroplast damage in sensitive cultivars were more severe, and Lhca1, Lhca3, and Lhca4 proteins in photosystem II and Lhcb1-Lhcb6 proteins in photosystem I were inhibited compared with those in the tolerant cultivar. These conclusions may be the main reason for the different tolerances of the two cultivars. These findings will provide new insights into the response of other crops to HTH stress and also provide a basis for future research on the mechanism of HTH resistance in melon.

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Section: Discussionsupporting

confidence: 90%

Physiological and Transcriptomic Analysis Reveals the Responses and Difference to High Temperature and Humidity Stress in Two Melon Genotypes

Weng

Rehman

et al. 2022

IJMS

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“…In this study, exposing plants to salt stress resulted in a significant decrease in their membrane stability index (MSI) and a greater increase in H 2 O 2 and malondialdehyde (MDA) (Figure 2). Generally, under abiotic stress conditions, the excessive generation of reactive oxygen species (ROS) is a common response in many plant species to oxidative damage [45][46][47][48]. These harmful molecules can lead to destruction of cell membrane structure by affecting the structure and function of the protein and lipid bilayers [49].…”

Section: Discussionmentioning

confidence: 99%

Exogenous Application of Alpha-Lipoic Acid Mitigates Salt-Induced Oxidative Damage in Sorghum Plants through Regulation Growth, Leaf Pigments, Ionic Homeostasis, Antioxidant Enzymes, and Expression of Salt Stress Responsive Genes

Youssef

Raafat

El-Yazied

et al. 2021

Plants

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In plants, α-Lipoic acid (ALA) is considered a dithiol short-chain fatty acid with several strong antioxidative properties. To date, no data are conclusive regarding its effects as an exogenous application on salt stressed sorghum plants. In this study, we investigated the effect of 20 µM ALA as a foliar application on salt-stressed sorghum plants (0, 75 and 150 mM as NaCl). Under saline conditions, the applied-ALA significantly (p ≤ 0.05) stimulated plant growth, indicated by improving both fresh and dry shoot weights. A similar trend was observed in the photosynthetic pigments, including Chl a, Chl b and carotenoids. This improvement was associated with an obvious increase in the membrane stability index (MSI). At the same time, an obvious decrease in the salt induced oxidative damages was seen when the concentration of H2O2 and malondialdehyde (MDA) was reduced in the salt stressed leaf tissues. Generally, ALA-treated plants demonstrated higher antioxidant enzyme activity than in the ALA-untreated plants. A moderate level of salinity (75 mM) induced the highest activities of superoxide dismutase (SOD), guaiacol peroxidase (G-POX), and ascorbate peroxidase (APX). Meanwhile, the highest activity of catalase (CAT) was seen with 150 mM NaCl. Interestingly, applied-ALA led to a substantial decrease in the concentration of both Na and the Na/K ratio. In contrast, K and Ca exhibited a considerable increase in this respect. The role of ALA in the regulation of K+/Na+ selectivity under saline condition was confirmed through a molecular study (RT-PCR). It was found that ALA treatment downregulated the relative gene expression of plasma membrane (SOS1) and vacuolar (NHX1) Na+/H+ antiporters. In contrast, the high-affinity potassium transporter protein (HKT1) was upregulated.

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“…All the major processes, such as photosynthesis, and the energy of plants are also affected by salinity stress. Salinity reduced the ability of plants to absorb water, leading to growth reduction, as well as to impaired metabolic processes similar to those caused by water stress [ 10 , 11 ] and heat stress [ 12 ]. The negative effect of salinity stress on growth, physiological aspects, and productivity has been observed in different plant species, such as the faba bean ( Vicia faba ) [ 13 , 14 ], common bean ( Phaseolus vulgaris ) [ 15 , 16 ], wheat ( Triticum aestivum ) [ 17 ], basil ( Ocimum basilicum ) [ 18 ], and lupine (Lupinus termis) [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Salt Stress and Foliar Application of Salicylic Acid on Morphological, Biochemical, Anatomical, and Productivity Characteristics of Cowpea (Vigna unguiculata L.) Plants

El-Taher

El-Raouf

Osman

et al. 2021

Plants

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The present study aimed to investigate the impact of salinity on vegetative growth, chemical constituents, and yields of cowpeas (Vigna unguiculata) and the possible benefits of salicylic acid (SA) on these plants after damage from salinity. To achieve these objectives, two pot experiments were carried out at the Faculty of Agriculture, Al-Azhar University, Egypt, during the two growing seasons of 2019 and 2020. The results revealed that salinity significantly decreased, and SA treatment substantially increased the plant height, number of compound leaves, number of internodes per plant, fresh weights of leaves and stems, productivity, photosynthetic pigments content, and concentrations of nitrogen (N), phosphorus (P), and potassium (K) of the cowpea plants compared with the control. The anatomical structure of stems and leaves of the plants were also investigated, and it was found that positive variations in the anatomical structure of the median portion of the main stems and blades of mature foliage leaves were detected in the stressed and SA-treated plants. In conclusion, SA treatment increased the salt stress tolerance of cowpea plants by improving the morphological and physiological attributes of the plants.

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Melatonin-mediated photosynthetic performance of tomato seedlings under high-temperature stress

Cited by 137 publications

References 63 publications

Physiological and Transcriptomic Analysis Reveals the Responses and Difference to High Temperature and Humidity Stress in Two Melon Genotypes

Physiological and Transcriptomic Analysis Reveals the Responses and Difference to High Temperature and Humidity Stress in Two Melon Genotypes

Exogenous Application of Alpha-Lipoic Acid Mitigates Salt-Induced Oxidative Damage in Sorghum Plants through Regulation Growth, Leaf Pigments, Ionic Homeostasis, Antioxidant Enzymes, and Expression of Salt Stress Responsive Genes

Effect of Salt Stress and Foliar Application of Salicylic Acid on Morphological, Biochemical, Anatomical, and Productivity Characteristics of Cowpea (Vigna unguiculata L.) Plants

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