@Article{phyton.2025.061462,
AUTHOR = {Cheng Sun, Chen Zhao, Guohua Wang, Qianwen Mao, Rong Han},
TITLE = {Cerium Oxide Nanoparticles Alleviate Enhanced UV-B Radiation-Induced Stress in Wheat Seedling Roots by Regulating Reactive Oxygen Species},
JOURNAL = {Phyton-International Journal of Experimental Botany},
VOLUME = {94},
YEAR = {2025},
NUMBER = {2},
PAGES = {455--479},
URL = {http://www.techscience.com/phyton/v94n2/59821},
ISSN = {1851-5657},
ABSTRACT = {Enhanced UV-B radiation represents a major environmental factor impacting global cereal production. Researchers have explored various approaches to reduce the detrimental impact of UV-B radiation on crops. Recently, engineered nanoparticles, particularly cerium oxide nanoparticles (CeO<sub>2</sub>-NPs), have attracted widespread interest for their ability to boost plant tolerance to a range of abiotic stresses. This study investigates how CeO<sub>2</sub>-NPs application affects the morphology, physiology, biochemistry, and transcriptomics profiles of wheat seedling roots subjected to enhanced UV-B stress. The findings demonstrate that CeO<sub>2</sub>-NPs notably promoted root length, fresh and dry weights, and root activity (<i>p</i> < 0.05) under enhanced UV-B stress. CeO<sub>2</sub>-NP treatment reduced the content of hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) and malondialdehyde (MDA) in wheat, alleviating oxidative damage in seedling roots and partially restoring the root phenotype. Under non-UV-B stress conditions, CeO<sub>2</sub>-NP treatment triggered the difference of 237 transcripts in plants relative to the control group. Under enhanced UV-B stress, CeO<sub>2</sub>-NP treatment exhibited differentially expressed genes (DEGs) linked to the antioxidant defense mechanism responsible for reactive oxygen species (ROS) scavenging, compared to the non-nanoparticle control. This suggests that ROS scavenging may be a key mechanism by which CeO<sub>2</sub>-NPs enhance wheat resistance to enhanced UV-B radiation. This study elucidates a potential molecular mechanism through which CeO₂ nanoparticles may enhance wheat tolerance to UV-B stress.},
DOI = {10.32604/phyton.2025.061462}
}