Carbon nanotubes can promote seed germination via seed coat penetration
Pourkhaloee, A., M. Haghighi, M. J. Saharkhiz, H. Jouzi and M. M. Doroodmand. 2011. Carbon nanotubes can promote seed germination via seed coat penetration. Journal of Seed Technology. 33 (2): 155-169.
Some nanoparticles, like carbon nanotubes, can significantly change plant cell morphology and physiology. e effects of single-walled carbon nanotubes (SWCNT) on seed germination and seedling growth of salvia (Salvia macrosiphon Boiss.), pepper (Capsicum annuum L.), and tall fescue (Festuca arundinacea Schreb.) were studied at four concentrations (10, 20, 30, and 40 mg L−1) plus a control (0 mg L−1) under laboratory and greenhouse conditions. In the laboratory, application of SWCNT increased germination percentage compared to the control. e highest germination percentages for salvia, pepper and tall fescue were 59.6%, 92.9% and 72.9%, respectively. ebest effect on seedling length was observed at 10 mg L−1 of SWCNT for salvia and pepper, and at 40 mg L−1 for tall fescue. In the greenhouse, 30 mg L−1 of SWCNT led to the greatest seedling length. In laboratory and greenhouse studies, 10, 20, and 30 mg L−1 of SWCNT had the most pronounced effects on seedling fresh and dry weights compared to the control. For most measured parameters, the highest concentration of SWCNT was associated with negative effects. Overall, the best seed germination and seedling growth for salvia and tall fescue were achieved at 30 mg L−1 of SWCNT, and at 10 mg L−1for pepper.