Intermediates of Hydrogen Peroxide-Assisted Photooxidation of Salicylic Acid: Their Degradation Rates and Ecotoxicological Assessment

International Journal of Molecular Sciences, Journal Year: 2025, Volume and Issue: 26(2), P. 697 - 697

Published: Jan. 15, 2025

Accelerated photooxidation of salicylic acid (SA) was performed using UV radiation and hydrogen peroxide. HPLC-MS analysis showed that the primary intermediates are 2,5-dihydroxybenzoic acid, 2,3-dihydroxybenzoic pyrocatechol, phenol. Deeper oxidation leads to low molecular weight aliphatic acids, such as maleic, fumaric, glyoxylic. The main carried out in same conditions. degradation SA its follows first-order reaction kinetics. In case irradiation alone, photodegradation is slightly faster (reaction rate constant 0.007 min−1) compared (0.0052 min−1). Other products degrade more slowly than SA. Hydrogen peroxide, concentrations 1.8–8.8 mM, accelerates intermediate products. An ecotoxicological evaluation EPI SuiteTM software. overall persistence (POV) long-range transport potential (LRTP) all transformation were assessed OECD POV LRTP screening tool. Salicylic have toxicity. Due their high solubility, these contaminants can travel considerable distances aquatic environment. phenol values 156–190 km. shorter (less 100 km).

Language: Английский

---

Modulation of Photosystem II Function in Celery via Foliar-Applied Salicylic Acid during Gradual Water Deficit Stress

International Journal of Molecular Sciences, Journal Year: 2024, Volume and Issue: 25(12), P. 6721 - 6721

Published: June 18, 2024

Water deficit is the major stress factor magnified by climate change that causes most reductions in plant productivity. Knowledge of photosystem II (PSII) response mechanisms underlying crop vulnerability to drought critical better understanding consequences on plants. Salicylic acid (SA) application under may stimulate PSII function, although exact mechanism remains essentially unclear. To reveal celery plants sprayed with water (WA) or SA, we employed chlorophyll fluorescence imaging analysis at 48 h, 96 and 192 h after watering. The results showed up watering, stroma lamellae SA-sprayed leaves appeared dilated, efficiency declined, compared WA-sprayed plants, which displayed a function. However, was restored, while SA boosted synthesis, ameliorating osmotic potential it resulted higher relative leaf content acting as an antioxidant stress, suppressed phototoxicity, thereby offering photoprotection, together enhanced effective quantum yield photochemistry (ΦPSII) decreased quantity singlet oxygen (1O2) generation photoprotection induced triggered non-photochemical quenching (NPQ), strategy protect chloroplast from photo-oxidative damage dissipating excess light energy heat. This photoprotective mechanism, NPQ adequate keeping, especially high-light conditions, equal fraction open reaction centers (qp) non-stress conditions. Thus, activates regulatory network partitioning signaling can mitigate, extent, functioning.

Language: Английский

---

Effects of vermicompost application on plant growth and soil enzyme activity in wheat ( Triticum aestivum L.) monitored by thermal imaging

Cogent Food & Agriculture, Journal Year: 2024, Volume and Issue: 10(1)

Published: Aug. 2, 2024

This research aims to investigate the effects of vermicompost on growth wheat plants (Triticum aestivum L.), soil enzyme activities, and nutrient uptake, while also monitoring plant development through thermal imaging. The study was conducted seeds sown in enriched with various rates (Control: 0, T1: 2, T2: 4, T3: 6, T4: 8 Mg ha−1) continued under greenhouse conditions for 120 days. results showed that increasing doses application significantly increased activities enzymes such as β-glucosidase, urease, catalase, promoted dry weight (P < 0.05). Additionally, imaging analysis revealed reduced leaf temperatures plants, promoting plant's upper parts While concentration essential nutrients nitrogen (N) phosphorus (P) 0.05), its effect macro elements (K, Mg, Ca) not statistically significant > However, a increase micronutrients iron (Fe), zinc (Zn), copper (Cu), manganese (Mn) observed findings this suggest use along techniques optimize enzymes, matter quantity, micronutrients, overall areas similar properties.

Language: Английский

---

Investigation of Suitable Osmolytes for Enhancing Cotton Plant Adaptation to Drought Scenarios and Improving Water Use Efficiency

Deleted Journal, Journal Year: 2024, Volume and Issue: 76(5), P. 1193 - 1208

Published: Sept. 6, 2024

Language: Английский

---