CAJ | 학술논문

黄瓜叶片在水分胁迫下叶片相对含水量减少，类囊体室温吸收光谱的吸收峰降低;同时其NADP光还原活性、Ca2+-ATPase活性也相应降低，全链电子传递明显受阻。类囊体膜蛋白电泳分析结果显示:类囊体膜色素蛋白复合体含量有不同程度的降低。其中PSⅡ色素蛋白复合体含量下降较多。试验结果表明水分胁迫通过限制光能的吸收,传递以及转换效率，抑制了光合电子传递过程。
황과협편재수분협박하협편상대함수량감소，류낭체실온흡수광보적흡수봉강저;동시기NADP광환원활성、Ca2+-ATPase활성야상응강저，전련전자전체명현수조。류낭체막단백전영분석결과현시:류낭체막색소단백복합체함량유불동정도적강저。기중PSⅡ색소단백복합체함량하강교다。시험결과표명수분협박통과한제광능적흡수,전체이급전환효솔，억제료광합전자전체과정。
Under water stress,the relative water content of cucumber leaves decreased and the electron transfer velocity in whole chain significantly slowed down with the reduction of the activities on NADP photoreduction,on Ca2+-ATPase and the lowering peak of absorption spectrum at room temperature on cucumber thylakoids.Furthermore,the results,which were obtained by analyzing SDS-PAGE pattern,showed that the polypeptides content of thylakoid membrane declined in different degree,especially the protein complex polypeptides bound to photosystem Ⅱ.As demonstrated above,these observations suggest that the process of photosynthetic electron transport was inhibited under water stress is due to the decreased efficiency of light-energy absorption,transportation and transformation on thylakoid membrane.