为了研究盐胁迫对PSII反应中心异质性的影响,采用微机接口使荧光仪信号数字化,用微机记录小麦完整叶片PSII的荧光诱导动力学曲线,通过分析荧光诱导的快相部分的参数(F_m,F_(p1)和F_O)看到PSII Q_B非还原中心的比例首先降低,其次很快增加,且随时间和胁迫强度而增加,表明PSII反应中心Q_A到Q_B的电子传递是盐胁迫对光系统II光化学和光物理过程损伤的位点之一. In order to study the effect of salt stress on the heterogeneity of PSII reaction center, the fluorescence signal was digitized by computer interface and the fluorescence induction kinetics curve of intact leaf PSII of wheat was recorded by microcomputer. By analyzing the parameters of fluorescence-induced fast phase (Fm, F_ (p1) and F_O) showed that the proportion of PSII Q_B non-reducing center decreased firstly, then increased rapidly and increased with the time and stress intensity, indicating that the electron transfer of PSII reaction centers Q_A to Q_B was caused by salt stress on photosystem II One of the sites of photochemical and photophysical damage.