Exposure to low levels of photocatalytic TiO2 nanoparticles enhances seed germination and seedling growth of amaranth and cruciferous vegetables

Autor: Chi-Cheng Li, Sian-Ming Jhou, Yi-Chen Li, Jhih-Wei Ciou, You-Yen Lin, Shih-Che Hung, Jen-Hsiang Chang, Jen-Che Chang, Der-Shan Sun, Ming-Lun Chou, Hsin-Hou Chang
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: Scientific Reports, Vol 12, Iss 1, Pp 1-15 (2022)
Druh dokumentu: article
ISSN: 2045-2322
DOI: 10.1038/s41598-022-23179-9
Popis: Abstract Titanium dioxide (TiO2) is one of the most common compounds on Earth, and it is used in natural forms or engineered bulks or nanoparticles (NPs) with increasing rates. However, the effect of TiO2 NPs on plants remains controversial. Previous studies demonstrated that TiO2 NPs are toxic to plants, because the photocatalytic property of TiO2 produces biohazardous reactive oxygen species. In contrast, another line of evidence suggested that TiO2 NPs are beneficial to plant growth. To verify this argument, in this study, we used seed germination of amaranth and cruciferous vegetables as a model system. Intriguingly, our data suggested that the controversy was due to the dosage effect. The photocatalytic activity of TiO2 NPs positively affected seed germination and growth through gibberellins in a plant-tolerable range (0.1 and 0.2 mg/cm2), whereas overdosing (1 mg/cm2) induced tissue damage. Given that plants are the foundations of the ecosystem; these findings are useful for agricultural application, sustainable development and maintenance of healthy environments.
Databáze: Directory of Open Access Journals
Nepřihlášeným uživatelům se plný text nezobrazuje