title: Antifungal activity and mechanism of palladium-modified nitrogen-doped titanium oxide photocatalyst on agricultural pathogenic fungi Fusarium graminearum.
abstract: Fusarium graminearum is the pathogen for Fusarium head blight (FHB) on wheat, which could significantly reduce grain quality/yield and produce a variety of mycotoxins posing a potential safety concern to human foods. As an environmentally friendly alternative to the commonly used chemical fugicides, a highly effective photocatalytic disinfection of F. graminearum macroconidia under visible light illumination was demonstrated on a visible-light-activated palladium-modified nitrogen-doped titanium oxide (TiON/PdO) nanoparticle photocatalyst. Because of the opposite surface charges of the TiON/PdO nanoparticles and the F. graminearum macroconidium, the nanoparticles were strongly adsorbed onto the macroconidium surface, which is beneficial to the photocatalytic disinfection of these macroconidia. The photocatalytic disinfection mechanism of TiON/PdO nanoparticles on these macroconidia could be attributed to their cell wall/membrane damage caused by the attack from reactive oxygen species (ROSs) as demonstrated by the fluorescence/phase contrast microscopy observations, while a breakage of their cell structure was not necessary for their loss of viability.
authors.affiliation: Environment Functional Materials Division, Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences , 72 Wenhua Road, Shenyang, Liaoning Province, 110016, P. R. China.
authors.forename: Jingtao
authors.initials: J
authors.lastname: Zhang
authors.forename: Yang
authors.initials: Y
authors.lastname: Liu
authors.forename: Qi
authors.initials: Q
authors.lastname: Li
authors.forename: Xiaoping
authors.initials: X
authors.lastname: Zhang
authors.forename: Jian Ku
authors.initials: JK
authors.lastname: Shang
mesh_terms: D000935:Antifungal Agents / Q000737:chemistry* / Q000494:pharmacology; D002384:Catalysis / Q000187:drug effects; D005670:Fusarium / Q000187:drug effects*; D006801:Humans; D008027:Light; D053758:Nanoparticles / Q000008:administration & dosage / Q000737:chemistry*; D009584:Nitrogen / Q000737:chemistry; D010165:Palladium / Q000737:chemistry; D010777:Photochemistry; D017382:Reactive Oxygen Species / Q000737:chemistry; D014025:Titanium / Q000737:chemistry; D014908:Triticum / Q000382:microbiology
chemical_list: D000935:Antifungal Agents; D017382:Reactive Oxygen Species; C009495:titanium dioxide; D010165:Palladium; C048320:palladium oxide; D014025:Titanium; D009584:Nitrogen