Melatonin-mediated temperature stress tolerance in plants

GM crops & food, Journal Year: 2022, Volume and Issue: 13(1), P. 196 - 217

Published: Aug. 19, 2022

Global climate changes cause extreme temperatures and a significant reduction in crop production, leading to food insecurity worldwide. Temperature extremes (including both heat cold stresses) is one of the most limiting factors plant growth development severely affect physiology, biochemical, molecular processes. Biostimulants like melatonin (MET) have multifunctional role that acts as “defense molecule” safeguard plants against noxious effects temperature stress. MET treatment improves tolerance by improving several defense mechanisms. Current research also suggests interacts with other molecules, phytohormones gaseous which greatly supports adaptation Genetic engineering via overexpression or CRISPR/Cas system biosynthetic genes uplifts levels transgenic enhances stress tolerance. This review highlights critical production We documented how molecules alleviate MET-mediated breeding would be great potential helping adverse creating plants.

Language: Английский

---

Melatonin and Abiotic Stress Tolerance in Crop Plants

International Journal of Molecular Sciences, Journal Year: 2023, Volume and Issue: 24(8), P. 7447 - 7447

Published: April 18, 2023

Increasing food demand by the growing human population and declining crop productivity due to climate change affect global security. To meet challenges, developing improved crops that can tolerate abiotic stresses is a priority. Melatonin in plants, also known as phytomelatonin, an active component of various cellular mechanisms alleviates oxidative damage hence supporting plant survive stress conditions. Exogenous melatonin strengthens this defence mechanism enhancing detoxification reactive by-products, promoting physiological activities, upregulating stress-responsive genes alleviate during stress. In addition its well-known antioxidant activity, protects against regulating hormones, activating ER genes, increasing protein homoeostasis, heat shock transcription factors proteins. Under stress, enhances unfolded response, endoplasmic reticulum-associated degradation, autophagy, which ultimately protect cells from programmed cell death promotes repair resulting increased survival.

Language: Английский

---

Melatonin-priming enhances maize seedling drought tolerance by regulating the antioxidant defense system

PLANT PHYSIOLOGY, Journal Year: 2023, Volume and Issue: 191(4), P. 2301 - 2315

Published: Jan. 20, 2023

Abstract Drought stress (DS) challenges sustainable agriculture production by limiting crop growth and development. The objective of the study was to evaluate effect melatonin-priming on enzymatic non-enzymatic antioxidant defense mechanisms its relation with leaf ultrastructure stomatal traits in maize (Zea mays L) seedlings under DS (PEG-6000). drastically decreased seed germination, plant growth, chlorophyll content due excessive reactive oxygen species (ROS) production. Melatonin-priming significantly (P < 0.05) increased root length, shoot fresh seedling weight, proline content, total soluble protein sugar aperture size 101%, 30%, 133%, 51%, 22%, 59%, 54%, 20%, 424%, compared no priming (NP) DS, respectively. Similarly, improved reduced amount loss oxidative damage seedlings. Melatonin 500 µM melatonin (M2) greatly superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), glutathione, ascorbate (AsA) activity, 65%, 63%, 94%, 41%, 55% NP 0.26%, 8%, 33%, 42%, 15% no-stress (NS), also malondialdehyde electrolyte leakage, hydrogen peroxide (H2O2) anion (O2−) 26%, 31%, 33% 18%, 10%, 11% NS, In response stabilized chloroplast structure, sustained cell expansion, protected walls, traits, including number, width. Our results suggest that improves drought tolerance alleviating negative ROS.

Language: Английский

---

Nitrogen Fertilizer Modulates Plant Growth, Chlorophyll Pigments and Enzymatic Activities under Different Irrigation Regimes

Agronomy, Journal Year: 2022, Volume and Issue: 12(4), P. 845 - 845

Published: March 30, 2022

Nitrogen fertilization and irrigation patterns have been extensively studied for common maize (Zea mays L.), but there is limited published work Zhengda 619, especially in subtropical areas. (N) fertilizer play an important role crop growth yield improvements. The study aimed to investigate the yield, growth, chlorophyll content, reactive oxygen species (ROS) enzyme activities of hybrid (Zhengda 619) under greenhouse conditions. Individual plants grown plastic pots were subjected two types—low (LW; 60% field capacity) high water (HW; 80% capacity)—and five N rates. Our results demonstrate that LW increased dry matter, kernel leaf chlorophyll, total root length, diameter, volume, surface area, as well soil enzymes plant antioxidant enzymes, while it lowered malondialdehyde (MDA), proline, ROS. Moreover, most above parameters with increasing application rates up N3 due availability enzymes. It concluded could improve decrease ROS, ultimately resulting a higher irrigation.

Language: Английский

---

Phytomelatonin: A master regulator for plant oxidative stress management

Plant Physiology and Biochemistry, Journal Year: 2023, Volume and Issue: 196, P. 260 - 269

Published: Jan. 23, 2023

Language: Английский

---

Melatonin Enhances the Photosynthesis and Antioxidant Enzyme Activities of Mung Bean under Drought and High-Temperature Stress Conditions

Plants, Journal Year: 2023, Volume and Issue: 12(13), P. 2535 - 2535

Published: July 3, 2023

Mung bean, a legume, is sensitive to abiotic stresses at different growth stages, and its yield potential affected by drought high-temperature stress the stage. Melatonin multifunctional hormone that plays vital role in plant defense mechanisms. This study aimed evaluate efficiency of melatonin under individual combined mung bean. An experiment was laid out with five treatments, including an exogenous application 100 µM as seed treatment, foliar spray, combination both treatment well absolute control (ambient condition) (stress without treatment). Stresses were imposed during bean's reproductive stage (31-40 DAS) for ten days. Results revealed significantly decreased chlorophyll index, Fv/Fm ratio, photosynthetic rate, stomatal conductance, transpiration rate through increased reactive oxygen species (ROS) production. Foliar concentration enhanced activity antioxidant enzymes such superoxide dismutase, catalase, ascorbate peroxidase metabolites involved osmoregulation ion homeostasis; thereby, it improves physiological yield-related traits bean

Language: Английский

---

Melatonin-Mediated Molecular Responses in Plants: Enhancing Stress Tolerance and Mitigating Environmental Challenges in Cereal Crop Production

International Journal of Molecular Sciences, Journal Year: 2024, Volume and Issue: 25(8), P. 4551 - 4551

Published: April 21, 2024

Cereal crops are crucial for global food security; however, they susceptible to various environmental stresses that significantly hamper their productivity. In response, melatonin has emerged as a promising regulator, offering potential benefits stress tolerance and crop growth. This review explores the effects of on maize, sorghum, millet, rice, barley, wheat, aiming enhance resilience stress. The application shown outcomes, improving water use efficiency reducing transpiration rates in millet under drought conditions. Furthermore, it enhances salinity heavy metal by regulating activity stress-responsive genes. Similarly, sorghum its resistance high temperatures, low humidity, nutrient deficiency, potentially involving modulation antioxidant defense aspects related photosynthetic Melatonin also exerts protective against drought, salinity, metal, extreme waterlogging barley decreasing reactive oxygen species (ROS) production through system. molecular reactions upregulated photosynthesis, mechanisms, metabolic pathway, genes downregulated susceptibility conclusion, serves versatile tool cereal crops, bolstering promoting sustainable development. Further investigations warranted elucidate underlying mechanisms refine techniques fully harness role systems.

Language: Английский

---

Melatonin and its cross-talk with other signaling molecules under abiotic stress

Plant Stress, Journal Year: 2024, Volume and Issue: 11, P. 100410 - 100410

Published: Feb. 24, 2024

Melatonin is a hormone-like substance that serves as secondary metabolite associated with variety of physiological, hormonal, and natural processes at the cell, tissue, organ levels. It acts plant biostimulant increase tolerance against abiotic stresses like ssalinity, drought, heat, cold heavy metals. in plants, also called phytomelatonin, participating cellular mechanisms ameliorates oxidative toxicity, hence helps to stand stress conditions. These exclusive properties strengthen defense capacity by stimulating detoxification reactive oxygen species (ROS), promoting physiological attributes, activation stress-responsive genes ameliorate toxicity caused stress. As key molecule, it exhibits several important molecular interactions nitric oxide (NO), calcium (Ca2+), hydrogen peroxide (H2O2) sulfide (H2S). In this review article, we discuss salient role melatonin morphological adaptation well its involvement mitigation. Besides, under stress, interaction NO, Ca2+, H2O2, H2S has been demonstrated. This study will provide reference for elucidating regulatory mechanism influencing resistance plants.

Language: Английский

---

Exogenous melatonin enhances heat stress tolerance in sweetpotato by modulating antioxidant defense system, osmotic homeostasis and stomatal traits

Horticultural Plant Journal, Journal Year: 2024, Volume and Issue: unknown

Published: May 1, 2024

Heat stress hinders the growth and productivity of sweetpotato plants, predominantly through oxidative damage to cellular membranes. Therefore, development efficient approaches for mitigating heat-related impairments is essential long-term production sweetpotatoes. Melatonin has been recognised its capacity assist plants in dealing with abiotic conditions. This research aimed investigate how different doses exogenous melatonin influence heat plants. drastically affected shoot root fresh weight by 31.8 44.5%, respectively. reduction resulted characterised increased formation hydrogen peroxide (H2O2) 804.4%, superoxide ion (O2•−) 211.5% malondialdehyde (MDA) 234.2%. also reduced chlorophyll concentration, photosystem II efficiency (Fv/Fm) 15.3% gaseous exchange. However, pre-treatment 100 μmol · L-1 under stress. In particular, decreased H2O2, O2•− MDA 64.8%, 42.7% 38.2%, mitigated decline levels improved stomatal traits, exchange Fv/Fm (13%). Results suggested that favorable outcomes treatment can be associated elevated antioxidant enzyme activity an increase non-enzymatic antioxidants osmo-protectants. Overall, these findings indicate improve tolerance study will researchers further investigating makes sweetpotatoes more resistant

Language: Английский

---

Genotype-dependent resilience mediated by melatonin in sweet corn

BMC Plant Biology, Journal Year: 2025, Volume and Issue: 25(1)

Published: Jan. 8, 2025

Water deficits, exacerbated by climate change and unpredictable weather, have become a significant global challenge to agricultural productivity. In this context, exogenous melatonin treatment is well documented as stress alleviator; however, its effects on various biological processes, particularly in less-explored genotypes, remain understudied. This study aimed enhance water deficit resilience sweet corn applying foliar four genotypes-Messenger, Dessert, Royalty, Tyson under two levels of deprivation induced polyethylene glycol at 8% 12% concentrations hydroponic, controlled environment. The treatments were assessed for their impact morphological, physiological, biochemical parameters both normal water-deficit conditions. Under severe (12% PEG), increased root length 75%, peroxidase activity 31% while reducing malondialdehyde content 34% genotype Dessert indicating enhanced antioxidant defense reduced oxidative damage. Likewise stomatal conductance 68%, with increasing specific area 125% deprivation. also improved chlorophyll-a 93% Royalty 37% Tyson, decrease 42% damage addition, photosystem II efficiency (Fv/Fm) all genotypes 27% increase quantum yield across regardless the level. Overall, showed genotype-specific dose-dependent mitigating effects, offering promising strategy improve crop productivity limited environments. These results suggest practical application integrating into sustainable practices, such improving tolerance potentially other crops, maintain adverse climatic

Language: Английский

---