CHLOROPHYLL DEGRADATION UNDER SMOG EXPOSURE: UNVEILING THE MOLECULAR AND ECOLOGICAL CONSEQUENCES

Bulletin of Biological and Allied Sciences Research, Journal Year: 2025, Volume and Issue: 2025(1), P. 96 - 96

Published: Feb. 11, 2025

The current study revealed that exposure to smog posed a major source of environmental stress and reduced photosynthesis vigor in plants. Chlorophyll breakdown is aspect sensitivity triggered by altered oxidative stress, an integral photosynthesis. Therefore, the general objective this evaluate molecular ecological impacts chlorophyll degradation Arabidopsis thaliana plants under conditions as evidenced markers, hormonal regulation, chlorophyllase activity. were cultivated growth chamber optimal temperature, light/dark regime, after acclimatization exposed artificial for total 48 hours NO₂ 50 ppm, O₃ 120 PM10. Untreated or control arranged similar photoperiod regimes with no smog. b, malondialdehyde (MDA) hydrogen peroxide (H₂O₂), SOD, abscisic acid (ABA), cytokinins, gibberellins, auxins, potassium (K⁺), chloride (Cl⁻), calcium (Ca²⁺), (H⁺), chlorophyllase, ROS assessed. treatment outcomes compared appropriate using p-values determine significance level change between smog-exposed Smog led decreases content (from 1.20 ± 0.05 0.75 0.03 mg/g) b 0.50 0.02 0.30 mg/g; = 0.015 0.019, respectively). There also increased levels MDA (1.45 0.10 nmol/g), H₂O₂ (4.50 0.12 µmol/g), SOD (21.6 1.53 U/mg protein) (15.2 1.37 protein, 0.023, 0.022, Phytohormones responded treatments increasing ABA contents (85.79 ng/g FW) while decreasing cytokinin 40.63 FW. Concentrations potassium, chloride, calcium, ions changed guard cells, where difference was significant plants, (85.32 mM), (70.27 (45.17 mM) (0.0156 mM). Chlorophyllase activity higher than controls: µmolg-1h-1 0.15 0.01 µmolg-1h-1; p < 0.004. fluorescence intensity (280.22 18.33 AU) associated statistically (p 0.003). This work proves negatively on levels, changing upregulating findings reveal processes involved plant responses show smog-induced loss health ecosystem services.

Language: Английский

Indigenous bacteria as potential agents for trace metal remediation in industrial wastewater

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: April 16, 2025

Water pollution is a burning issue that can originate from both urbanization and industrialization. This study aimed to evaluate the industrial wastewater collected Hayatabad Industrial Estate use indigenous bacteria, Pseudomonas aeruginosa Enterobacter aerogenes for bioremediation. The water samples were analyzed physicochemical parameters microbial pollution. To analyze removal efficiency by bacterial species, pot experiment was performed 14 days. Before after experiment, trace metal concentration Atomic Absorption Spectroscopy. biochemical molecular analysis confirmed presence of two species (P. E. aerogenes). treated with these isolated showed significantly decreased level electrical conductivity (42.33-86.45%), dissolved oxygen (16.35-63.37%), biological demand (33.33-80.62%), chemical (00-83.52%), total suspended solids (00-80%), (0.00-54.93%). P. Cu, Cd, Pb ranging 77.58-82.35%, 19.67-50%, 20.40-91.66%, respectively. Similarly, removed in range 47.05-60.61%, 54.55-62.29%, 85.21-91.6%, Phytotoxicity results revealed gives better Triticum sp. % germination rate, leaf length, root shoot weight. highest plant control (100%), followed (100%). t- test metals (TM) reduced (p ≤ 0.05) bacterio-remediation. concluded are active TM wastewater.

Language: Английский