中文摘要：

在前期以EMS（甲基磺酸乙酯）筛选更多抗生物和非生物逆境的突变体试验中，发现了1个从G到A的点突变体rfc3-1,该点突变削弱了植株抗紫外辐射的能力．将野生型拟南芥复制因子C亚基3基因转化到突变株rfc3-1后恢复了突变株的野生型表型，证明紫外辐射抗性异常表型是由拟南芥复制因子C亚基3基因突变所引起的，AtRFC3在拟南芥紫外辐射抗性中起重要作用．

英文摘要：

Replication factor C （RFC）, consisting of one large subunit and four small subunits, is an important factor involved in DNA replication and repair mechanisms as well as cell proliferation. The subunit 3 of Arabidopsis RFC （AtRFC3） is one of the 4 small subunits. In a former EMS （ethylmethane sulfonate） screening to find out more mutant resistant to biotic and abiotic stresses, rfc3-1 was identified as a point mutant with G to A mutation occurred in the second exon which compromised the resistance of rfc3-1 plants to ultraviolet. Transformation of wild type AtRFC3 gene into rfc3-1 mutant reverted the mutant phenotypes, suggesting that AtRFC3 plays an important role in ultraviolet resistance in Arabidopsis thaliana.