In order to study the influence of He-Ne laser on root-bending in wheat caused by enhanced UV-B irradiation,the wheat seedlings were exposed to He-Ne laser with 5mW·mm-2 power density after enhanced UVB irradiation(10.08kJ·m-2·d-1).The content of actin,the content and type variety of flavonoids in wheat roots were studied.The results show that compared with those of the contrast group,the main radical length becomes shorter,the content of actin and flavonoids in the UV-B irradiation enhanced group is reduc...