摘要
用扫描电镜、透射电镜、荧光显微镜研究铝胁迫对龙眼叶、根超微结构的影响。结果表明 ,铝胁迫造成龙眼叶片超微结构的破坏。其中最明显的变化是叶绿体的破坏 ,表现为叶绿体膜系统受损加重 ,基粒片层扭曲紊乱 ;其次是细胞壁的降解 ,细胞之间间隙变小 ,部分液泡膜破裂 ,液泡消失 ;线粒体膜系统受到破坏 ,嵴数量明显减少甚至消失。铝胁迫下龙眼根端膨大 ,根尖变粗变短 ,从外表皮到中柱出现不同程度的龟裂 ,且随铝浓度的提高 ,这种伤害程度不断加重 ;根伸长区细胞细胞壁发生降解 ,细胞间距变小 ;膜系统遭到破坏 ,核膜、线粒体膜破裂 ;细胞中淀粉粒明显减少 ,甚至消失 ;根尖分生组织细胞核变形 ,细胞核数量大大减少。
Using scanning microscope, clairvoyant microscope and fluorescent microscope, the responses of cell ultra-structure of Longan(Dimocarpus longan) leaves and roots to aluminum stress were studied. The results showed as follows: Aluminum stress caused damage on the cell ultra-structure of Longan leaves. The damage on chloroplast was most distinguished. Under aluminum stress, membrane system of chloroplast was damaged greatly, grana lamellae twisted and disordered. It was also found that the cytoplasm segregate...
出处
《林业科学》
EI
CAS
CSCD
北大核心
2003年第S1期58-61,203-205,共7页
Scientia Silvae Sinicae
基金
教育部 ( 0 2 0 73 )资助
福建省林业厅"龙眼果园土壤酸化及铝毒改良技术研究"项目共同资助
关键词
龙眼
铝胁迫
叶
根
细胞超微结构
Longan(Dimocarpus longan)
Aluminum stress
Leaf
Root
Cell ultra-structure