Melatonin involves hydrogen sulfide in the regulation of H+-ATPase activity, nitrogen metabolism, and ascorbate-glutathione system under chromium toxicity

Contamination of soils with chromium (Cr) jeopardized agriculture production globally. The current study was planned with the aim to better comprehend how melatonin (Mel) and hydrogen sulfide (H2S) regulate antioxidant defense system, potassium (K) homeostasis, and nitrogen (N) metabolism in tomato...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Environmental pollution (1987) Jg. 323; S. 121173
Hauptverfasser: Khan, M. Nasir, Siddiqui, Manzer H., Mukherjee, Soumya, AlSolami, Mazen A., Alhussaen, Khalaf M., AlZuaibr, Fahad M., Siddiqui, Zahid H., Al-Amri, Abdullah A., Alsubaie, Qasi D.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: England Elsevier Ltd 15.04.2023
Schlagworte:
agricultural productivity
antioxidant activity
Antioxidants - metabolism
Ascorbate-glutathione system
Ascorbic Acid - metabolism
Ascorbic Acid - pharmacology
chlorides
chromium
Chromium - metabolism
Chromium - toxicity
Cysteine
electrolyte leakage
Glutathione - metabolism
H+-ATPase activity
H-transporting ATP synthase
homeostasis
hydrogen sulfide
Hydrogen Sulfide - metabolism
Hydrogen Sulfide - pharmacology
lipid peroxidation
melatonin
Melatonin - metabolism
Melatonin - pharmacology
nitrogen
Nitrogen - metabolism
phytochelatins
pollution
potassium
Potassium homeostasis
reactive oxygen species
Reactive Oxygen Species - metabolism
Seedlings
sodium
tetraethylammonium compounds
tomatoes
toxicity
Cysteine
Nitrogen metabolism
Potassium homeostasis
H+-ATPase activity
Ascorbate-glutathione system
H(+)-ATPase activity
ISSN:0269-7491, 1873-6424, 1873-6424
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:Contamination of soils with chromium (Cr) jeopardized agriculture production globally. The current study was planned with the aim to better comprehend how melatonin (Mel) and hydrogen sulfide (H2S) regulate antioxidant defense system, potassium (K) homeostasis, and nitrogen (N) metabolism in tomato seedlings under Cr toxicity. The data reveal that application of 30 μM Mel to the seedlings treated with 25 μM Cr has a positive effect on H2S metabolism that resulted in a considerable increase in H2S. Exogenous Mel improved phytochelatins content and H+-ATPase activity with an associated increase in K content as well. Use of tetraethylammonium chloride (K+-channel blocker) and sodium orthovanadate (H+-ATPase inhibitor) showed that Mel maintained K homeostasis through regulating H+-ATPase activity under Cr toxicity. Supplementation of the stressed seedlings with Mel substantially scavenged excess reactive oxygen species (ROS) that maintained ROS homeostasis. Reduced electrolyte leakage and lipid peroxidation were additional signs of Mel's ROS scavenging effects. In addition, Mel also maintained normal functioning of nitrogen (N) metabolism and ascorbate-glutathione (AsA-GSH) system. Improved level of N fulfilled its requirement for various enzymes that have induced resilience during Cr stress. Additionally, the AsA-GSH cycle's proper operation maintained redox equilibrium, which is necessary for the biological system to function normally. Conversely, 1 mM hypotaurine (H2S scavenger) abolished the Mel-effect and again Cr-induced impairment on the above-mentioned parameters was observed even in presence of Mel. Therefore, based on the observed findings, we concluded that Mel needs endogenous H2S to alleviate Cr-induced impairments in tomato seedlings.
Bibliographie:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0269-7491
1873-6424
1873-6424
DOI:10.1016/j.envpol.2023.121173