Cd和表面活性剂复合污染对小麦叶片若干生理性状的影响

Effect of cadmium-surfactant combined pollution on physiological caracteristics of wheat leaf

研究了溶液培养条件下Cd-直链十二烷基本磺酸钠（LAS）、Cd-十六烷基三甲基溴化铵（CTAB）和Ch-聚氧乙烯山梨醇月桂酸酯（Tween-80）3种复合污染对小麦生理状态的影响．结果表明，表面活性剂促进Cd在小麦叶中的积累，其效应顺序为CTAB＞LAS＞Tween80．Cd和表面活性剂复合污染条件下，小麦叶中Cd的大量积累导致的细胞膜脂过氧化水平大大高于单纯Cd污染下的水平．细胞中SH基含量降低和叶片外渗液紫外吸收的上升．表明细胞膜受到损伤．复合污染使小麦叶中叶绿素的含量显著下降．

The studies on the effect of combined polution of Cd and three surfactants (linear alkylbenzenesulphonate(LAS), cetyltrimethylammonium bromide (CTAB ) and Tween 80 on physiologicalcharacteristics of wheat leaf showed that all of these three whacants could increase the accumulation of cacllnium in wheat leaf. Their effect was in the order of CTAB>LAS>Tween 80.The lipid peroxidation level of cells was higher when poluted by Cd-snrtacant than by Cd only.Both the contents of sulfhydry group and chlorophyll were deereased significantly. The ultraviolet absorption value of leaked leaf soution was increased, indicating the destroying effect of thecombined pollution on cell membrane.