Ecofisiologia de plantas jovens de Kahya senegalensis em ambiente salino DOI Open Access
Willian Viana Campos

Published: Oct. 23, 2023

The effects of environmental elements interfere directly and indirectly in the estimation transpiration.An condition significant magnitude is saline environments, which generate abiotic stress that limits plant production.This study aimed to determine direct indirect interactions variables have on crop transpiration, stomatal conductance photosynthesis young African mahogany plants under salinity conditions a semi-arid region.The was conducted drainage lysimeters, with (Khaya senegalensis) plants, using water an electrical conductivity 0,5 dS.m -1 ; 1,25 2 2,75 3,5 4,25 e 5 - 1 total seven treatments, three replications 21 experimental units (plants), order promote optimization use resources influencing ecophysiological behavior are characterized by global radiation (Rg), photosynthetically active (Qleaf), atmospheric vapor pressure deficit (DPV) potential, were obtained season meteorological data from INPE present area.The experiment during first four months development, period considered installation northeast region country (Bahia), field at State University Southwest Bahia (UESB), campus Vitória da Conquista, collection consecutive months: January, February March 2022.The assessments transpiration (E), (Gs) (A) carried out aid diffusion porometer.steady state, model LCPro-SD.Monitoring irrigation outwith portable meter adding sodium chloride (NaCl) water, maintained 0.5 , for each units. .The regression analysis between (global potential), independent variables, (transpiration photosynthesis), dependent used mathematically modulate depending explanatory variables.With generated experiment, as variable, perfect function radiation.The value level tested lower higher water.It also observed restriction resulted decrease potential plants.Solar played important role regulating plants.Water had similar stress, resulting reduced availability, atrophy conducting vessels, nutrient absorption decreased growth production.

Language: Английский

MsbZIP55 regulates salinity tolerance by modulating melatonin biosynthesis in alfalfa DOI Creative Commons
Tingting Wang, Jiaqi Yang, Jinjun Cao

et al.

Plant Biotechnology Journal, Journal Year: 2025, Volume and Issue: unknown

Published: March 13, 2025

Summary Soil salinity is a severe abiotic stress that damages plant growth and development. As an antioxidant free radical scavenger, melatonin well known for helping plants survive conditions, including stress. Here, we report the salt‐related gene MsSNAT1 , encoding rate‐limiting biosynthesis enzyme, located in chloroplast contributes to tolerance alfalfa. We found overexpressing alfalfa lines exhibited higher endogenous levels increased salt by promoting systems improving ion homeostasis. Furthermore, through combination of transcriptome sequencing, dual‐luciferase assays transgenic analysis, identified basic leucine zipper (bZIP) transcription factor, MsbZIP55, associated with response expression. EMSA analysis ChIP‐qPCR uncovered MsbZIP55 can recognize directly bind promoter vitro vivo . acts as negative regulator expression, thereby reducing biosynthesis. Morphological revealed conferred sensitivity Na + /K ratio lower activities, which could be alleviated applying exogenous melatonin. Silencing RNA interference resulted expression promoted enhancing system enzyme activities Our findings indicate MsbZIP55‐MsSNAT1 module plays crucial role regulating while facilitating protection against These results shed light on regulatory mechanism related

Language: Английский

Citations

0
Effects of melatonin and bacterial bio-stimulants on calendula officinalis under salinity stress DOI Creative Commons
Omniea M. Allam,

A. M. Kandeel,

Salma El Sayed Hassan

et al.

Journal of the Saudi Society of Agricultural Sciences, Journal Year: 2025, Volume and Issue: 24(1-2)

Published: March 24, 2025

Abstract Melatonin can mitigate the adverse effects of salt stress in plants, but combined it and bacterial bio-stimulants on enhancing plant resilience to salinity remain poorly understood. To fill such a knowledge gap, we investigated interaction between melatonin growth, productivity, physiological characteristics Calendula officinalis seedlings under stress. Using pot-sand culture method, tested various concentrations exogenous (distilled water, 50, 100 µM) with mixture (5 ml/pot at 10 8 CFU/ml) Azotobacter chroococcum , Bacillus megaterium Pseudomonas fluorescens . The were subjected different saline irrigation levels NaCl (tap 42.8, 85.6, 128.3 mM) over two growing seasons 2023 2024. experiment was designed as factorial study using randomized complete block design three replicates. 85.6 mM negatively affected seedling growth yield. Foliar application µM inoculation significantly enhanced leaf area shoot dry weight. Inflorescence parameters improved notably, increases total carotenoids flavonoids petals. Total chlorophyll content, mineral percentages (N, P, K), proline increased significantly, while sodium chloride decreased. activities polyphenol oxidase peroxidase also relative water content reduced electrolyte leakage. Our findings suggest that combination effectively seedlings.

Language: Английский

Citations

0
Role of plant neurotransmitters in salt stress: A critical review DOI
Paheli Malakar, Santosh Kumar Gupta, Debasis Chattopadhyay

et al.

Plant Physiology and Biochemistry, Journal Year: 2024, Volume and Issue: 211, P. 108601 - 108601

Published: April 8, 2024

Language: Английский

Citations

3
Tolerance Mechanisms of Olive Tree (Olea europaea) under Saline Conditions DOI Creative Commons
Mohamed El Yamani, María del Pilar Cordovilla

Plants, Journal Year: 2024, Volume and Issue: 13(15), P. 2094 - 2094

Published: July 29, 2024

The olive tree (

Language: Английский

Citations

3
Priming Potato Plants with Melatonin Protects Stolon Formation under Delayed Salt Stress by Maintaining the Photochemical Function of Photosystem II, Ionic Homeostasis and Activating the Antioxidant System DOI Open Access
М. В. Ефимова,

Е. Д. Данилова,

Ilya E. Zlobin

et al.

International Journal of Molecular Sciences, Journal Year: 2023, Volume and Issue: 24(7), P. 6134 - 6134

Published: March 24, 2023

Melatonin is among one of the promising agents able to protect agricultural plants from adverse action different stressors, including salinity. We aimed investigate effects melatonin priming (0.1, 1.0 and 10 µM) on salt-stressed potato (125 mM NaCl), by studying growth parameters, photochemical activity photosystem II, water status, ion content antioxidant system activity. as a pleiotropic signaling molecule was found decrease negative effect salt stress stolon formation, tissue status without significant expression Na+/H+-antiporter genes localized vacuolar (NHX1 NHX3) plasma membrane (SOS1). effectively decreases accumulation lipid peroxidation products in leaves whole range concentrations studied. A melatonin-induced dose-dependent increase Fv/Fm together with uncontrolled non-photochemical dissipation Y(NO) also indicates decreased oxidative damage. The observed protective ability unlikely due its influence enzymes, since neither SOD nor peroxidase were activated melatonin. exerted positive water-soluble low-molecular-weight antioxidants, proline flavonoids, which could aid decreasing stress. most consistent carotenoids, are well-known lipophilic antioxidants playing an important role protection photosynthesis Finally, it possible that accumulated during pretreatment exert direct antioxidative ROS scavenging molecules.

Language: Английский

Citations

8
The Physiological Mechanism of Exogenous Melatonin on Improving Seed Germination and the Seedling Growth of Red Clover (Trifolium pretense L.) under Salt Stress DOI Creative Commons
Rui Liu, Ting Wang, Jiajie Wang

et al.

Plants, Journal Year: 2024, Volume and Issue: 13(17), P. 2527 - 2527

Published: Sept. 8, 2024

Salt stress can affect various physiological processes in plants, ultimately hindering their growth and development. Melatonin (MT) effectively resist multiple abiotic stresses, improving plant resistance. To analyze the mechanism of exogenous MT to enhance salt tolerance red clover, we conducted a comprehensive study examine influence on parameters, including seed germination indices, seedling morphological traits, photosynthetic indicators, using four distinct clover varieties (H1, H2, H3, H4). This investigation was performed under conditions with differing pH values, specifically utilizing NaCl, Na2SO4, NaHCO3, Na2CO3 as stressors. The results showed that solution immersion significantly improved indicators seeds stress. foliar spraying 50 μM 25 increased SOD activity (21–127%), POD activity, soluble sugar content, proline content (22–117%), chlorophyll (2–66%), net rate. It reduced MDA (14–55%) intercellular CO2 concentration seedlings Gray correlation analysis Mantel test further verified is key factor enhancing stress; most significant improvement observed for NaHCO3 demonstrated improve through variety mechanisms, an increase antioxidant enzyme osmoregulation ability, cell membrane stability. Additionally, it improves efficiency architecture, promoting energy production, growth, optimal resource allocation. These mechanisms function synergistically, enabling sustain normal development

Language: Английский

Citations

1
Melatonin-Mediated Salt Stress Tolerance in Plants DOI
Tanveer Alam Khan,

Bisma Hilal,

Qazi Fariduddin

et al.

Plant in challenging environments, Journal Year: 2023, Volume and Issue: unknown, P. 299 - 312

Published: Jan. 1, 2023

Language: Английский

Citations

2
Adaptive responses of a threatened halophyte Juncus rigidus Desf. to salinity stress through anatomy, ionic composition and antioxidant modulations DOI

Mohamed Mohamed Abd El-Maboud,

Sureshkumar Mesara,

Doddabhimappa R. Gangapur

et al.

Acta Physiologiae Plantarum, Journal Year: 2023, Volume and Issue: 45(10)

Published: Sept. 13, 2023

Language: Английский

Citations

2
OsPIPK-FAB, A Negative Regulator in Rice Immunity Unveiled by OsMBL1 Inhibition DOI Creative Commons
Ruina Zhang,

Mengtian Pei,

Shiyi Lin

et al.

Rice, Journal Year: 2024, Volume and Issue: 17(1)

Published: Nov. 4, 2024

Phosphatidylinositol signaling system plays a crucial role in plant physiology and development, phosphatidylinositol phosphate kinases (PIPKs) are one of the essential enzymes responsible for catalyzing synthesis bisphosphate (PIP2) within this pathway. However, its mechanism signal transduction remains poorly exploited plants. OsMBL1, jacalin-related mannose-binding lectin rice, defense mechanisms, acting as key component pattern-triggered immunity (PTI) Here, rice phosphatidylinositol-phosphate kinase FAB (OsPIPK-FAB), member PIPKs family, an interacting protein OsMBL1 through yeast-two-hybrid (Y2H) screening assay. And interaction was confirmed by using co-immunoprecipitation (Co-IP) pull-down assay techniques. Furthermore, we demonstrated that deletion OsPIPK-FAB gene enhanced resistance against blast while overexpression increases sensitivity to fungal infection. Additionally, determination measurement inositol 1,4,5-trisphosphate (IP3) contents 4-phosphate 5-kinase (PIP5K) activity, revealed inhibits PIP5K activity well IP3 rice. Conclusively, these findings indicated serves novel critical is negatively involved PTI activation inhibited OsMBL1.

Language: Английский

Citations

0
Melatonin-mediated physio-biochemical, and ultrastructural modifications in tomato plants to foster drought stress tolerance DOI
Tanveer Alam Khan,

Bisma Hilal,

Marino B. Arnao

et al.

Plant Growth Regulation, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 29, 2024

Language: Английский

Citations

0