烟草光合细胞Chla荧光动力学和超弱发光对低强度射频电磁场的响应

The Responses of Chlorphyll Fluorescence Dynamics and Ultraweak Photoemission in Photosynthesis Cell of Tobacco to Low Level Radio Frequency Electromagnetic Field

在 30 0MHz低强度射频电磁场的作用下 ,烟草叶片光合细胞Chla荧光动力学过程和超弱发光均发生了变化 ,荧光动力学参数F0 、FV/F0 、FV/Fm、ΔFV/T和T1/2 及超弱发光的光子数对电磁场辐射功率的响应呈现出非线性和“功率窗”特征 ,表明低强度射频电磁场对光合细胞具有非热效应 电磁场的非热效应使得烟草叶片光合细胞的细胞膜受到伤害 ,PSⅡ反应中心受损、PSⅡ潜在活性降低 ,光合电子传递过程受阻 。

Under the action of low level radio frequency electromagnetic field of 300 MHz , Chlorophyll fluorescence dynamics process and ultra weak photoemission in leaf of tobacco change. The responses of the fluorescence dynamics parameters F 0,F V/F 0,F V/F m,ΔF V/T,T 1/2 and the number of ultra weak photoemission to the radiating power of electromagnetic field seem to be the characters of non linear and power window. These results show that there is non thermal effect of electromagnetic field on photosynthesis cell of tobacco. The effect makes the damage of membrane of photosynthesis cell in leaf of tobacco, the barricade of transmit process of electron in photosynthesis ,the decrease of potential active and photochemical efficiency of PSⅡ.