|本期目录/Table of Contents|

[1]龙新宪,麦少芝,林初夏.Zn在两种生态型东南景天体内的分布和对亚显微结构的影响[J].应用与环境生物学报,2005,11(05):536-541.
 LONG Xinxian,et al..Zinc distribution and ultrastructural change of cells in Sedum alfredii Hance from two ecotypes[J].Chinese Journal of Applied & Environmental Biology,2005,11(05):536-541.
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Zn在两种生态型东南景天体内的分布和对亚显微结构的影响()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
11卷
期数:
2005年05期
页码:
536-541
栏目:
综述
出版日期:
2005-10-25

文章信息/Info

Title:
Zinc distribution and ultrastructural change of cells in Sedum alfredii Hance from two ecotypes
作者:
龙新宪麦少芝林初夏
( 1华南农业大学资源环境学院 广州 510642) (2华南师范大学地理系 广州 510631) ( 3华南农业大学热带亚热带生态研究所 广州 510642)
Author(s):
LONG Xinxianet al.
(1College of Resources and Environment, South China Agricultural University, Guangzhou 510642, China) ( 2Department of Geography, South China Normal University, Guangzhou 510631, China) ( 3Centre for Ecological and Environmental Technologies, South China Agricultural University, Guangzhou 510642, China)
关键词:
关键词 东南景天 Zn 超积累 亚显微结构 生态型
Keywords:
Keywords Sedum alfredii Hance zinc hyperaccumulation ultrastructure ecotype
摘要:
摘要 运用营养液培养和透射电镜观察方法比较研究了Zn在两种生态型东南景天的根系、茎和叶片中的分布特点和亚显微结构的变化.结果表明,在Zn 500 μmol L-1浓度下,超积累生态型东南景天的上部叶与下部叶Zn含量的比值在1.47~1.67之间,上部茎与下部茎Zn含量的比值范围为1.81~2.11;非超积累生态型则刚好相反,Zn 100 μmol L-1处理后,其下部叶和下部茎中Zn含量均高于上部叶和上部茎.电镜观察显示,超积累生态型东南景天的叶、茎细胞的液泡中,和叶细胞的细胞壁上均发现一些颗粒物质,因此推断液泡将Zn区室化或沉积在细胞壁是超积累生态型东南景天耐高Zn胁迫和超积累Zn的重要生理机制. 图2 表2 参19
Abstract:
Abstract Growth experiment using Zncontaining nutrient solutions was conducted to examine the distribution of Zn and ultrastructural change of cells in Sedum alfredii Hance from two ecotypes ( Zn hyperaccumulating and nonhyperaccumulating ecotypes). The results showed that for Zn hyperaccumulating ecotype under 500 μmol L-1 Zn treatment, the ratio of Zn concentration of the younger leaf to that of the older leaf and the ratio of Zn concentration in the younger portion of stem to that in older portion was 1.47~1.67 and 1.81~2.11, respectively. However, for non hyperaccumulating ecotype, Zn concentration of the younger leaf or the younger portion of stem was always higher than that of the older leaf or the older portion of stem under 100 μmol L-1 Zn treatment. Electron microscopy showed that there were some granular substances in the cells of leaf and stem. This suggests that compartmentalization of Zn by vacuole may be an important mechanism through which the hyperaccumulating ecotype of S. alfredii Hance develops Zn tolerance and strong capacity for Zn hyperaccumulation. Fig 2, Tab 2, Ref 19

相似文献/References:

[1]缪绅裕,陈桂珠,黄玉山,等.模拟试验初探秋茄湿地系统中锌的分配与土壤容量[J].应用与环境生物学报,1999,5(01):8.
 MIAO Shenyu,et al..Allocation and capacity of zinc in artificial wastewater in simulated wetland system with Kandelia candel[J].Chinese Journal of Applied & Environmental Biology,1999,5(05):8.

更新日期/Last Update: 2005-10-27