Effect of Cd Contamination on ultramicroscopic structure and some elements content of tobacco leaves
镉污染对烟草叶片超微结构及部分元素含量的影响

To determinate the effects of cadmium(Cd) toxicity on tobaccoes(Nicotiana tabacum L.),chlorophyll content and the value of chlorophyll a/b,density of stomatas and trichomes on abaxial epidermis of leaves,ultramicroscopic structure of the leaves,content of some elements in leaves and secreting materials by trichomes were studied under Cd stress.Tobacco seedlings with same number of leaves(six leaves) and same height were selected.After roots were washed with deionized water,the seedlings were transferred and...