根际微生物区系与蕹菜茎叶镉含量的关系

Relationship Between Rhizosphere Microflora and Cadmium Concentrations in Water Spinach Stems and Leaves

通过根箱试验,研究了2种蕹菜镉积累典型品种,即强坤柳叶白骨(QK,Cd-PSC)和台湾308纯白柳叶(T-308,非Cd-PSC)的根际土壤微生物区系。结果表明:品种间茎叶镉含量差异极显著;根系微生物对QK起抑制作用,而对T-308起促进作用,且对QK的影响作用大于对T-308的作用。QK茎叶镉含量与根系真菌变化关系最密切;而T-308与根系细菌变化关系最密切。

A root box experiment was carried out in order to study the microflora of rhizosphere soil of two typical water spinach（ Ipomoea aquatica Forssk）,qiangkunliuyebaigu（ QK,Cd-PSC）and Tai-wan 308 chunbailiuye（ T-308 ,non-Cd-PSC ）. The results show that the difference of Cadmium con-centrations between two different cultivars is remarkably significant,and the root system microorgan-ism takes the inhibitory action to QK,but takes the promoter action to T-308. And their influence on QK is greater than that to T-308 . The change relation between Cadmium concentration in stem and leaf of QK and the root system fungus is the closest,but the change of variety T-308 is closest to the root system.