Insight into the mitigation of arsenic toxicity in rice using hydroxyapatite and silicon-doped hydroxyapatite under waterlogged and dry conditions
Plant and Soil, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Basım Tarihi: 2026
- Doi Numarası: 10.1007/s11104-026-09021-5
- Dergi Adı: Plant and Soil
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, BIOSIS, CAB Abstracts, Chemical Abstracts Core, Environment Index, Geobase, Academic Search Ultimate (EBSCO), Natural Science Collection (ProQuest), Biological Science Database (ProQuest), Biomedical Reference Collection: Corporate Edition (EBSCO), Engineering Source (EBSCO)
- Anahtar Kelimeler: Arsenic contamination, Arsenic immobilization, Hydroxyapatite, Paddy soils, Rice, Silicon-doped hydroxyapatite
- Ankara Üniversitesi Adresli: Evet
Özet
Aims: Arsenic (As) contamination in paddy soils poses a serious risk to food safety. This study evaluated the effects of hydroxyapatite (HAP) and silicon-doped hydroxyapatite (SiHAP) on rice growth, As accumulation, and plant biochemical responses under waterlogged and dry conditions. Methods: Rice plants were grown under controlled waterlogged and dry conditions with treatments including control, As, As + HAP, and As + SiHAP. Plant growth, As concentrations in shoots and grains, and FTIR-based biochemical changes were determined. Results: Under waterlogged conditions, shoot weight decreased from 154 to 100 g pot−1 with As treatment, while As + HAP and As + SiHAP increased it to 112 and 108 g pot−1, respectively. Grain yield declined from 96.7 to 63.3 g pot−1 under As, partially recovered to 71.4 (HAP) and 69.0 g pot−1 (SiHAP). Shoot As concentration increased from 4.10 to 11.6 mg kg−1 under As stress, whereas HAP and SiHAP reduced it to 9.53 and 10.4 mg kg−1, respectively. Similarly, grain As concentration increased from 0.20 to 0.34 mg kg−1 following As exposure, but declined to 0.27 and 0.22 mg kg−1 with HAP and SiHAP treatments, respectively. Under dry conditions, shoot As rose from 0.20 to 4.90 mg kg−1, and decreased to 4.43 (HAP) and 4.23 mg kg−1 (SiHAP). Conclusion: Both the amendments reduced As accumulation and the superior performance of SiHAP in limiting grain-As and improving plant stress responses may be associated to combined phosphate immobilization and silicon-mediated protection. This study suggests the novel application of Si-doped hydroxyapatite for mitigating As accumulation in rice under contrasting water management conditions.