Barceló J, Vázquez M D, Poschenrieder Ch
Departamento de Fisiología Vegetal, Facultad de Ciencias, Universidad Autónoma de Barcelona, 08193 Bellaterra, Spain.
New Phytol. 1988 Jan;108(1):37-49. doi: 10.1111/j.1469-8137.1988.tb00202.x.
The effect of a growth reducing cadmium concentration (5 μg ml ) on the structure and ultrastructure of leaves, stomata and plastids of bush bean plants (Phaseolus vulgaris L. cv. Contender) grown on perlite was studied using light, transmission electron and scanning electron microscopy. The structural and ultrastructural alterations observed were not directly related to the average Cd content of the whole organs. In roots, where the highest Cd concentration was found, plastid ultrastructure was hardly affected, while in the upper parts of the plant the chloroplasts showed severe alterations. Disruption of chlorophyll synthesis and plastid ultrastructure was greater in young trifoliate leaves than in primary leaves. The effects of Cd toxicity on the structure and ultrastructure and their physiological implications are discussed in relation to Cd uptake.
采用光学显微镜、透射电子显微镜和扫描电子显微镜，研究了在珍珠岩上生长的矮生菜豆植株（菜豆属普通菜豆品种“竞争者”），其生长受抑制的镉浓度（5微克/毫升）对叶片、气孔和质体的结构及超微结构的影响。观察到的结构和超微结构变化与整个器官的平均镉含量没有直接关系。在镉浓度最高的根部，质体超微结构几乎未受影响，而在植株上部，叶绿体显示出严重变化。幼嫩三出复叶中叶绿素合成和质体超微结构的破坏比初生叶更大。结合镉的吸收，讨论了镉毒性对结构和超微结构的影响及其生理意义。
