Role of phytohormones in regulating abiotic stresses in wheat

Talaat, Neveen B.

doi:10.1016/b978-0-323-95368-9.00019-9

Cited by 4 publications

(10 citation statements)

References 130 publications

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“…According to the obtained results, MT-mediated improved barley productivity in water-scarce conditions can be ascribed to reduced photosynthetic pigment degradation, increased photosynthetic rate, overcome stomatal limitations, activated photosynthetic enzymes, improved endogenous hormonal acquisition, altered biological membrane structure, and reduced oxidative damage by suppressing H 2 O 2 production and activating antioxidant enzymes. This outcome is consistent with earlier research, which discovered that MT considerably enhanced plant growth and development in the presence of water scarcity [5,6,11,15,30,42,47,52]. These restorations in MT-treated plants are most likely the result of improved cell elongation and water content, reduced osmotic stress, as well as enhanced plant antioxidant activity [24,25,32,48].…”

Section: Discussionsupporting

confidence: 91%

“…This study's findings also showed that barley plants under water stress had oxidative damage, as seen by greater levels of H 2 O 2 , MDA, and EL as well as reduced MSI value. Similar outcomes are reported by [2,6,10,49,63]. Intriguingly, this experiment displayed a significant decline in the buildup of H 2 O 2 and MDA in stressed plants treated with MT.…”

Section: Discussionsupporting

confidence: 87%

“…The results of the current investigation showed that a lack of water had an adverse effect on the concentration of photosynthetic pigments, the activity of photochemical reactions, the capacity of gas exchange, the chlorophyll fluorescence system, and the Calvin cycle enzyme activity, which in turn reduced the efficiency of photosynthetic activity. Most studies have shown that photosynthetic pigment content can decrease as a result of water stress-induced oxidative damage caused by increased ROS formation [6,10,25,26]. Additionally, dryness caused a considerable decline in gas exchange and chlorophyll fluorescence properties [10,11] as well as a reduction in PSII activity [34,57,58].…”

Section: Discussionmentioning

confidence: 99%

“…Previous studies have shown that a lack of water causes an increase in reactive oxygen species (ROS) production, which causes oxidative damage to chloroplast and a decrease in chlorophyll content that limits photosynthesis [4,5]. Plant hormones such as indole-3-acetic acid, ethylene, jasmonic acid, gibberellic acid, cytokinins, abscisic acid, and salicylic acid are important signals for plant growth and development [6,7], and they also play a role in plant stress response [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

“…Similarly, MT treatment increases plant resistance to dehydration-induced leaf senescence by controlling the networks of genes and phytohormones, mostly by increasing IAA concentration and decreasing ABA content [46]. Under water stress conditions, it was discovered that MT and other phytohormones like indole-3-acetic acid, gibberellin, cytokinin, jasmonic acid, salicylic acid, and abscisic acid interact and that many MT-affected genes take part in different hormone signaling pathways [6,11,26]. These findings suggested that MT's ability to confer stress resistance may also be influenced by the control of hormone homeostasis.…”

Section: Introductionmentioning

confidence: 99%

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Drought Stress Alleviator Melatonin Reconfigures Water-Stressed Barley (Hordeum vulgare L.) Plants’ Photosynthetic Efficiency, Antioxidant Capacity, and Endogenous Phytohormone Profile

Talaat

2023

IJMS

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The production of crops is severely limited by water scarcity. We still do not fully understand the underlying mechanism of exogenous melatonin (MT)-mediated water stress tolerance in barley. This study is the first of its kind to show how MT can potentially mitigate changes in barley’s physio-biochemical parameters caused by water deficiency. Barley was grown under three irrigation levels (100%, 70%, and 30% of field capacity) and was foliar sprayed with 70 μM MT. The results showed that exogenously applied MT protected the photosynthetic apparatus by improving photosynthetic pigment content, photochemical reactions of photosynthesis, Calvin cycle enzyme activity, gas exchange capacity, chlorophyll fluorescence system, and membrane stability index. Furthermore, the increased levels of salicylic acid, gibberellins, cytokinins, melatonin, and indole-3-acetic acid, as well as a decrease in abscisic acid, indicated that foliar-applied MT greatly improved barley water stress tolerance. Additionally, by increasing the activity of antioxidant enzymes such as superoxide dismutase, catalase, ascorbate peroxidase, monodehydroascorbate reductase, dehydroascorbate reductase, and glutathione reductase and decreasing hydrogen peroxide content, lipid peroxidation, and electrolyte leakage, MT application lessened water stress-induced oxidative stress. According to the newly discovered data, MT application improves barley water stress tolerance by reprogramming endogenous plant hormone production and antioxidant activity, which enhances membrane stability and photosynthesis. This study unraveled MT’s crucial role in water deficiency mitigation, which can thus be applied to water stress management.

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Section: Discussionsupporting

confidence: 91%

Section: Discussionsupporting

confidence: 87%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Drought Stress Alleviator Melatonin Reconfigures Water-Stressed Barley (Hordeum vulgare L.) Plants’ Photosynthetic Efficiency, Antioxidant Capacity, and Endogenous Phytohormone Profile

Talaat

2023

IJMS

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Putrescine, in Combination with Gibberellic Acid and Salicylic Acid, Improves Date Palm Fruit Quality via Triggering Protein and Carbohydrate Accumulation and Enhancing Mineral, Amino Acid, Sugar, and Phytohormone Acquisition

Talaat,

Nesiem,

Gadalla

et al. 2023

J Plant Growth Regul

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Putrescine (Put), gibberellic acid (GA3), and salicylic acid (SA) are involved in improving fruit growth and development. This is the first study investigating the effect of 1 mM Put, 100 mg L-1 GA3, and 100 mg L-1 SA on Phoenix dactylifera, cv. Zaghloul fruits. The experiment was conducted in a completely randomized block design during two successive seasons and five treatments [control (distilled water spray), Put, Put + GA3, Put + SA, and Put + GA3 + SA] were sprayed at the Hababouk (cell division) stage and Kimri [unripe green (cell elongation)] stage. Our results showed that all treatments significantly improved the yield and quality of ‘Zaghloul’ fruit by increasing the dry matter, crude fiber, ash, total soluble solids, (reducing, non-reducing, and total soluble) sugars, carbohydrate, protein, nitrogen, phosphorus, potassium, calcium, magnesium, sodium, zinc, iron, and manganese content as well as the peroxidase and catalase activity. Compared with the control treatment, exogenous applications also enhanced the amino acid (glutamic acid, aspartic acid, proline, glycine, alanine, arginine, cysteine, histidine, isoleucine, leucine, lysine, methionine, phenylalanine, serine, threonine, tyrosine, valine) acquisition and phytohormone (indole-3-acetic acid, cytokinins, GA3, SA) content, while decreasing the percentage of moisture, total acidity, total phenols, and tannins. The novel evidence indicates that among all treatments, application of diamine (Put), in combination with phytohormones (GA3 and SA), has the greatest effect on improving ‘Zaghloul’ fruit yield by up-regulating the nutrient acquisition, sugar accumulation, amino acid profile, antioxidant response, and phytohormone performance. These findings support the use of Put in conjunction with GA3 and SA to improve fruit yield and quality.

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Gibberellic Acid and Salicylic Acid Dual Application Improves Date Palm Fruit Growth by Regulating the Nutrient Acquisition, Amino Acid Profile, and Phytohormone Performance

Talaat,

Nesiem,

Gadalla

et al. 2023

J Soil Sci Plant Nutr

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Gibberellic acid (GA3) and salicylic acid (SA) are crucial phytohormones that support fruit development. The objective of this study was to investigate the mechanism of spraying 100 mg L−1 GA3 and 100 mg L−1 SA in improving the Phoenix dactylifera, cv. Zaghloul fruit yield and quality. The experiment was conducted in a randomized complete block design during two successive growing seasons and four treatments [control (distilled water spray), 100 mg L−1 GA3, 100 mg L−1 SA, and 100 mg L−1 GA3 + 100 mg L−1 SA] were sprayed at the Hababouk and Kimri stages of date palm “Zaghloul” cv. The findings revealed that the GA3 and/or SA applications are necessary for improving the growth and development of “Zaghloul” fruit, which were associated with an increase in the content of dry matter, crude fiber, ash, total soluble solids, total soluble sugars, carbohydrate, protein, and essential nutrients. Moreover, compared with the control treatment, GA3 and/or SA exogenous treatments improved the activity of peroxidase and catalase, as well as the content of amino acids and phytohormones, while decreasing the content of moisture, total acidity, total phenol, and tannins. The results provide evidence that using GA3 in conjunction with SA has the greatest effect on improving “Zaghloul” fruit yield by up regulating the sugar accumulation, amino acid profile, nutrient acquisition, antioxidant capacity, and phytohormone performance. Consequently, combining GA3 with SA can be an effective strategy for enhancing fruit yield and quality.

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Role of phytohormones in regulating abiotic stresses in wheat

Cited by 4 publications

References 130 publications

Drought Stress Alleviator Melatonin Reconfigures Water-Stressed Barley (Hordeum vulgare L.) Plants’ Photosynthetic Efficiency, Antioxidant Capacity, and Endogenous Phytohormone Profile

Drought Stress Alleviator Melatonin Reconfigures Water-Stressed Barley (Hordeum vulgare L.) Plants’ Photosynthetic Efficiency, Antioxidant Capacity, and Endogenous Phytohormone Profile

Putrescine, in Combination with Gibberellic Acid and Salicylic Acid, Improves Date Palm Fruit Quality via Triggering Protein and Carbohydrate Accumulation and Enhancing Mineral, Amino Acid, Sugar, and Phytohormone Acquisition

Gibberellic Acid and Salicylic Acid Dual Application Improves Date Palm Fruit Growth by Regulating the Nutrient Acquisition, Amino Acid Profile, and Phytohormone Performance

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