采用5mW/mm2 He-Ne激光辐照、10.08kJ/(m2.d)UV-B辐射及二者组合对冬小麦“临优2018”幼苗进行处理,研究各处理组在不同处理天数下细胞凋亡的变化。研究结果显示,增强UV-B辐射能诱导小麦幼苗根尖出现细胞核向中心聚集,并形成凋亡小体等细胞凋亡现象。用流式细胞仪对不同处理组细胞凋亡情况进行定量分析,结果同样证明了增强UV-B处理能增加凋亡的细胞数目,并且在处理第5天时变化最为明显。而经He-Ne激光和UV-B复合处理后,细胞凋亡数目比单独UV-B处理组明显减少,差异极显著。因此认为He-Ne激光在一定程度上缓解了增强UV-B辐射对小麦幼苗根细胞凋亡的诱导作用。 The seedlings of winter wheat “Linyou 2018” were treated with 5mW / mm 2 He-Ne laser and 10.08kJ / (m2.d) UV-B radiation and the combination of the two was used to study the effect of different treatment days on the number of cells Apoptosis changes. The results show that enhanced UV-B radiation can induce the emergence of the root tip of wheat seedling nucleus to the center of accumulation, and the formation of apoptotic bodies such as apoptosis. Quantitative analysis of apoptotic cells in different treatment groups by flow cytometry also showed that the number of cells that increased UV-B treatment increased apoptosis, and the most obvious change occurred on the 5th day of treatment. After He-Ne laser and UV-B complex treatment, the number of apoptotic cells was significantly reduced compared with UV-B alone group, the difference was significant. So He-Ne laser to some extent alleviate the enhanced UV-B radiation on root induction of wheat seedling apoptosis.