西南林业大学学报2017，Vol.37Issue(6)：41-47,7.DOI:10.11929/j.issn.2095-1914.2017.06.007
铅镉胁迫对小叶榕叶片细胞超微结构的影响
Effects of Pb2+and Cd2+Stresses on Leaf Ultrastructure of Ficus parvifolia
摘要
Abstract
In this study, the annual Ficus parvifolia seedlings were took as experimental materials. The effects of single and complex Pb2+and Cd2+stresses with different concentrations on leaf ultrastructure and chlorophyll con-tent were studied. The results showed that leaf ultrastructure of F. parvifolia under Pb2+ stresses exhibited chloroplast with lower swelling and vacuolization degree, smaller change of starch grains and granules. Moreover, the content of chlorophyll showed an increasing tendency which suggested the seedlings had more tolerance to Pb2+treatment. Under Cd2+ stresses, there were relatively heavy degree damages of leaves ultrastructure with the Cd2+contents increasing. More specifically, the grana lamellae of the chloroplast structure arranged in disorder, broken and twisted. Besides, more starches and significantly decreasing chlorophyll content in the F. parvifolia leaves cell were observed. Under Pb2++Cd2+conbined stresses, mesophyll cell membrane was thinner. More loose and uninte-grated of chloroplast structure, heavier disintegrated chloroplast structure, disappeared thylakoid structure, broken cell membrane and organelle structure were observed. Moreover, chlorophyll contents of F. parvifolia under Pb2++Cd2+ combined stresses were lower than single stress treatment. In a word, the changes of chlorophyll contents, the leaf cell ultrastructure and the chloroplast ultrastructure indicated that the damaged degree of F. parvifolia seedlings was Pb2++Cd2+ combined stress > Cd2+ stress> Pb2+ stress关键词
小叶榕/幼苗/铅胁迫/镉胁迫/细胞/超微结构/叶绿素Key words
Ficus parvifolia/seedlings/Pb2+ stress/Cd2+ stress/cell/ultrastructure/chlorophyll分类
农业科技引用本文复制引用
黄晓霞,匡经舸,李琬婷,管菊,程小毛..铅镉胁迫对小叶榕叶片细胞超微结构的影响[J].西南林业大学学报,2017,37(6):41-47,7.基金项目
云南省面上基金项目(2010ZC264)资助 （2010ZC264）
云南省省级重点学科园林植物与观赏园艺建设经费项目(50097401)资助. （50097401）
