title: Influence of exogenous silicon on UV-B radiation-induced cyclobutane pyrimidine dimmers in soybean leaves and its alleviation mechanism.
abstract: The DNA is particularly sensitive to UV-B radiation and can readily be damaged by UV-B stress, resulting to the formation of photoproducts like cyclobutane pyrimidine dimers (CPDs). Silicon has multifarious benefits to plants, especially under biotic and abiotic stress. In this study, we used soybean seedlings to determine whether silicon could alleviate damage to DNA caused by UV-B stress. Silicon significantly reduced the accumulation of CPDs, lessening the damage of UV-B stress to the seedlings by the following three mechanisms: (1) increasing the concentration of UV-B absorbing compounds to reduce damage; (2) strengthening the antioxidant capacity of plants represented by higher levels of non-enzymatic antioxidants and (3) increasing the photolyase gene expression, thus accelerating photorepair.
authors.affiliation: Engineering Research Center of Plant Growth Regulator, Ministry of Education, College of Agronomy and Biotechnology, China Agricultural University, 100193 Beijing, China.
authors.forename: Jiana
authors.initials: J
authors.lastname: Chen
authors.affiliation: Engineering Research Center of Plant Growth Regulator, Ministry of Education, College of Agronomy and Biotechnology, China Agricultural University, 100193 Beijing, China.
authors.forename: Mingcai
authors.initials: M
authors.lastname: Zhang
authors.affiliation: Department of Soil Science, University of Calabar, Calabar, Nigeria.
authors.forename: A Egrinya
authors.initials: AE
authors.lastname: Eneji
authors.affiliation: Engineering Research Center of Plant Growth Regulator, Ministry of Education, College of Agronomy and Biotechnology, China Agricultural University, 100193 Beijing, China. Electronic address: ljmsmylny@cau.edu.cn.
authors.forename: Jianmin
authors.initials: J
authors.lastname: Li
mesh_terms: D018515:Plant Leaves / Q000187:drug effects / Q000378:metabolism / Q000528:radiation effects; D011740:Pyrimidine Dimers / Q000378:metabolism* / Q000528:radiation effects; D012825:Silicon / Q000494:pharmacology*; D013025:Glycine max / Q000187:drug effects* / Q000378:metabolism / Q000528:radiation effects; D014466:Ultraviolet Rays / Q000009:adverse effects
chemical_list: D011740:Pyrimidine Dimers; D012825:Silicon
keywords: Cyclobutane pyrimidine dimers; Silicon; Soybean; UV-B