The impact of polystyrene nanoplastics on lignin biosynthesis in <i>Arabidopsis thaliana</i> (L.)
PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Basım Tarihi: 2026
- Doi Numarası: 10.1007/s12298-025-01698-9
- Dergi Adı: PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, BIOSIS
- Çanakkale Onsekiz Mart Üniversitesi Adresli: Evet
Özet
The discharge of micro- and nanoplastics (NPs) into terrestrial environments poses a growing threat to ecosystems. Lignin, a key component of the plant cell wall, is crucial for growth and environmental adaptation. This study investigated the effects of polystyrene (PS)-NPs on lignin biosynthesis in Arabidopsis thaliana. Seedlings were exposed to PS-NPs at concentrations of 12.5, 25, and 50 mg L- 1 for five days. The uptake of PS-NPs by root tissues was confirmed using confocal laser scanning microscopy. PS-NPs exposure inhibited seedling growth and increased oxidative stress indicators, including hydrogen peroxide and malondialdehyde levels. The activities of lignin-related enzymes, such as soluble peroxidase (POD), cell wall-bound POD, and phenylalanine ammonia-lyase, were enhanced. The highest concentration of PS-NPs (50 mg L- 1) significantly elevated lignin accumulation in the roots. The expression of genes involved in lignin biosynthesis showed different patterns under PS-NPs treatments. These findings suggest that PS-NPs trigger lignification in plant roots in a concentration-dependent manner, potentially as a defense response to NP-induced stress.