Melatonin enhances salt tolerance in sorghum by modulating photosynthetic performance, osmoregulation, antioxidant defense, and ion homeostasis

Open Life Sciences, Journal Year: 2023, Volume and Issue: 18(1)

Published: Jan. 1, 2023

Melatonin is a potent antioxidant that can prevent plant damage caused by adverse stresses. It remains unclear whether exogenous melatonin mitigate the effects of salt stress on seed germination and seedling growth sorghum (Sorghum bicolor (L.) Moench). The aim this study was to decipher protective mechanisms (100 μmol/L) seedlings under NaCl-induced (120 mmol/L). Plant morphological, photosynthetic, physiological characteristics were analyzed at different timepoints after sowing. Results showed inhibited germination, growth, biomass accumulation reducing photosynthetic pigment contents, efficiency, root vigor, mineral uptake. In contrast, priming with enhanced biosynthesis, K+ content stress. application additionally activities enzymes (superoxide dismutase, catalase, ascorbate peroxidase, glutathione reductase) increased levels non-enzymatic antioxidants (reduced glutathione, ascorbic acid) in leaves. These changes accompanied increase leaf contents soluble sugars, proteins, proline, as well decrease hydrogen peroxide accumulation, malondialdehyde content, electrolyte leakage. Our findings indicate alleviate stress-induced through multifaceted mechanisms, such improving performance facilitating ion homeostasis osmoregulation, promoting defense reactive oxygen species scavenging.

Language: Английский

---

A meta-analysis of photosynthetic efficiency and stress mitigation by melatonin in enhancing wheat tolerance

BMC Plant Biology, Journal Year: 2024, Volume and Issue: 24(1)

Published: May 21, 2024

Abstract Background Our meta-analysis examines the effects of melatonin on wheat under varying abiotic stress conditions, focusing photosynthetic parameters, chlorophyll fluorescence, leaf water status, and pigments. We initially collected 177 publications addressing impact wheat. After meticulous screening, 31 published studies were selected, encompassing 170 observations 73 65 240 Results The analysis revealed significant heterogeneity across (I² > 99.90%) for aforementioned parameters evidence publication bias, emphasizing complex interaction between application plant physiological responses. Melatonin enhanced overall response ratio (ln RR ) rates, stomatal conductance, transpiration fluorescence yields by 20.49, 22.39, 30.96, 1.09%, respectively, compared to control (no melatonin). most notable controlled environmental conditions. Moreover, significantly improved content reduced potential, particularly hydroponic conditions varied stresses, highlighting its role in mitigating stress. also increases pigments with soil drenching foliar spray, these considered effective methods. Furthermore, influenced SPAD intercellular CO 2 concentrations, suggesting capacity optimize efficiency. Conclusions This synthesis confirms that enhances wheat’s resilience improving Despite observed consistent beneficial melatonin, specific methods e.g. demonstrate utility as a growth regulator management. These findings encourage focused research strategies maximize benefits farming, thus contributing sustainable agricultural practices.

Language: Английский

---

Study on the Biological Characteristics of Dark Septate Endophytes under Drought and Cadmium Stress and Their Effects on Regulating the Stress Resistance of Astragalus membranaceus

Journal of Fungi, Journal Year: 2024, Volume and Issue: 10(7), P. 491 - 491

Published: July 16, 2024

is a famous traditional medicinal plant. However, drought and cadmium (Cd) pollution are the main abiotic stress factors that affect plant growth yield ability to improve host's resistance through use of beneficial endophytic fungi. To evaluate tolerance dark septate endophytes (DSE) various stresses, 10 DSE strains [

Language: Английский

---

Effects of exogenous melatonin on wheat quality under drought stress and rehydration

Plant Growth Regulation, Journal Year: 2024, Volume and Issue: 103(3), P. 471 - 490

Published: Feb. 27, 2024

Language: Английский

---

SlbHLH1 mediates ABA treatment-retarded chilling injury by repressing SlPP2C29 in tomato fruit

Plant Science, Journal Year: 2024, Volume and Issue: 344, P. 112086 - 112086

Published: April 9, 2024

Language: Английский

---

Nanobiotechnology-mediated regulation of reactive oxygen species homeostasis under heat and drought stress in plants

Frontiers in Plant Science, Journal Year: 2024, Volume and Issue: 15

Published: Aug. 27, 2024

Global warming causes heat and drought stress in plants, which affects crop production. In addition to osmotic protein inactivation, reactive oxygen species (ROS) overaccumulation under is a secondary that further impairs plant performance. Chloroplasts, mitochondria, peroxisomes, apoplasts are the main ROS generation sites heat- drought-stressed plants. this review, we summarize scavenging plants highlight potential applications of nanobiotechnology for enhancing tolerance these stresses.

Language: Английский

---

Role of Melatonin in Directing Plant Physiology

Agronomy, Journal Year: 2023, Volume and Issue: 13(9), P. 2405 - 2405

Published: Sept. 18, 2023

Melatonin (MT), a naturally occurring compound, is found in various species worldwide. In 1958, it was first identified the pineal gland of dairy cows. MT an “old friend” but “new compound” for plant biology. It brings experts and research minds from broad field sciences due to its considerable influence on systems. The production process plants animals distinct, where has been expressed explicitly chloroplasts mitochondria plants. Tryptophan acts as precursor formation phyto-melatonin, along with intermediates including tryptamine, serotonin, N-acetyl 5-methoxy tryptamine. plays vital role growth phases such seed germination seedling crop significantly impacts gas exchange, thereby improving physio-chemical functions During stress, excessive generation accumulation reactive oxygen (ROS) causes protein oxidation, lipid peroxidation, nucleic acid damage, enzyme inhibition. Because directly antioxidant awakens defense system during stress reduces ROS, which results decreasing cellular oxidative damage. can enhance development response abiotic stresses drought, salinity, high temperature, flooding, heavy metals by regulating mechanism However, these reactions differ are based level kind stress. physiological towards development, tolerance stresses, approaches enhancing endogenous systems broadly reviewed suggested that steering compound directing major under changing climate future.

Language: Английский

---

Odyssey of environmental and microbial interventions in maize crop improvement

Frontiers in Plant Science, Journal Year: 2025, Volume and Issue: 15

Published: Jan. 9, 2025

Maize (Zea mays) is India's third-largest grain crop, serving as a primary food source for at least 30% of the population and sustaining 900 million impoverished people globally. The growing human has led to an increasing demand maize grains. However, cultivation faces significant challenges due variety environmental factors, including both biotic abiotic stresses. Abiotic stresses such salinity, extreme temperatures, drought, along with factors like bacterial, fungal, viral infections, have drastically reduced production quality worldwide. interaction between these complex; instance, stress can heighten plant's susceptibility pathogens, while overabundance pests exacerbate response stress. Given complexity interactions, comprehensive studies are crucial understanding how simultaneous presence affects crop productivity. Despite importance this issue, there lack data on combinations impact in key agricultural regions. This review focuses developing stress-tolerant varieties, which will be essential maintaining yields future. One promising approach involves use Plant Growth-Promoting Rhizobacteria (PGPR), soil bacteria that colonize rhizosphere interact plant tissues. Scientists increasingly exploring microbial strategies enhance maize's resistance Throughout process, insect microorganisms pose threats maize, diminishing quantity grain. Among various causing degradation, insects most prevalent, followed by fungal infections. also delves into latest advancements applying beneficial rhizobacteria across different agroecosystems, highlighting current trends offering insights future developments under normal conditions.

Language: Английский

---

Reprograming stress memory in plants: primeomics

Elsevier eBooks, Journal Year: 2025, Volume and Issue: unknown, P. 17 - 31

Published: Jan. 1, 2025

Language: Английский

---

Exogenous Melatonin Improves Drought Tolerance by Regulating the Antioxidant Defense System and Photosynthetic Efficiency in Fodder Soybean Seedings

Plants, Journal Year: 2025, Volume and Issue: 14(3), P. 460 - 460

Published: Feb. 5, 2025

Fodder soybean (Glycine max L.) with high protein and yield is a popular forage grass in northeast China. Seasonal drought inhibits its growth development during seedling stage. The objective of this study was to observe morpho-physiological changes fodder seedlings under melatonin (MT) treatments identify appropriate concentration alleviate the damage. Two varieties commonly used China were treated 0, 50, 100, 150 μM at soil water content 30%. results indicated that applying enhanced height, biomass altered root morphology water-deficient conditions. different concentrations significantly reduced contents H2O2, O2− MDA, while boosting capacity antioxidant defense system osmotic adjustment substances. Meanwhile, increases light energy capture transmission efficiency observed. Furthermore, treatment regulated expression levels genes associated photosynthesis system. Notably, 100 produced most favorable effect all These research provide new information for enhancing tolerance using chemical measures.

Language: Английский

---