摘要
以德国鸢尾为试材,采用液体培养方法研究了不同浓度铅胁迫对其分株苗生长的影响和分布等规律。结果表明:随着Pb2+浓度的升高,植株的株高、新发不定芽数、存活叶片数、根长、根数、鲜重及干重均随Pb2+浓度的增加呈下降的趋势。电镜超微结构显示铅主要富集在根中的细胞内外壁上,引起根和叶细胞破坏,铅影响德国鸢尾体内正常的物质代谢活动,抑制了植物生长。
Taking Iris germanica L. as material, the growth, lead（Pb）accumulation, tolerance and distribution of Iris germanica L. seedlings under Pb stress were investigated by nutrient solution culture method. The results showed that the ramet seedling height, new adventive bud number, live leaf number, root length, root number, fresh biomass and dry biomass of Iris germanica L. were all decreased with an increase of Pb2＋ under single Pb2＋ stress. Electron microscopic results showed that Pb2＋ deposited on the inner surface of cell walls and seriously destroyed the anatomical structure of root tip and leaf. In brief,Pb2＋ treatments affected metabolic activity of Iris germanica L. and inhibited growth of roots, rhizomes and leaves.
出处
《北方园艺》
CAS
北大核心
2014年第9期82-86,共5页
Northern Horticulture
基金
江苏省教育厅2012年‘青蓝工程’资助项目
江苏省‘农业三星工程’资助项目(SXGC[2013]088)
苏州市科技支撑计划资助项目(SNG201209)
关键词
德国鸢尾
铅(Pb)
生长
分布
Iris germanica L.
lead（Pb）
growth
distribution
