摘要
用Ｃｄ２＋、Ｈｇ２＋两种重金属离子溶液培育菱（ＴｒａｐａｂｉｃｏｒｎｉｓＯｓｂｅｃｋ．）植物体后，观察体细胞的细胞核及叶绿体超微结构的变化。处理后第８天，菱浮水叶叶片和不定根细胞中细胞核的染色质与核质遭到破坏，不定根中细胞核的核仁消失。但在各处理浓度（１０μｍｏｌ／Ｌ～５０μｍｏｌ／ＬＣｄ２＋或Ｈｇ２＋）下，核膜均保持完整。叶片细胞的叶绿体基粒数目减少，基粒片层解体，叶绿体双层膜断裂，叶绿体中的质体球流入细胞基质中。两种结构的破坏程度随处理的离子浓度提高而增大。说明菱体细胞超微结构的变化观测可作为监测重金属污染的一种方法。
The ultrastructure of nuclei and
chloroplasts in somatic cells of Trapa bicornis Osbeck. treated with two sorts of heavy metal
solution of Cd 2+ or Hg 2+ was observed. Treated with Cd 2+ or Hg 2+ solution on the 8th
day, chromatin and nucleoplasm in the cells of Trapa bicornis floating leaves and adventitious
roots got destructed, moreover nucleous in adventitious roots disappeared, but under all
treatments (10 μmol/L～50 μmol/L Cd 2+ or Hg 2+ solution) nuclear membrane kept intact. In
the floating leaves, number of chloroplast granas reduced, layers of grana disintegrate and
chloroplast envelope got disrupted, plastoglobuli in the chloroplast flowed into the cytoplasm.
Distructed degrees of the structure increased as the treated concentration of heavy metal
solution rose. These results could provide characteristics of structure change of somatic cells
induced by the harm of heavy metal water pollution on aquatic plants.
出处
《植物资源与环境》
CAS
CSCD
1999年第2期43-48,共6页
Journal of Plant Resources and Environment
基金
国家自然科学基金
江苏省自然科学基金
关键词
镉
汞
重金属离子
水污染
菱
细胞核
叶绿体
Cd 2+
Hg 2+
water pollution
Trapa bicornis Osbeck.
nucleus
chloroplast
