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| 互花米草幼苗对重金属镉胁迫的生理响应 | |
| 引用本文： | 石贵玉,粱士楚,黄雅丽,韦宇静,李佳枚. 互花米草幼苗对重金属镉胁迫的生理响应[J]. 广西植物, 2013, 0(6): 812-816 |
| 作者姓名： | 石贵玉 粱士楚 黄雅丽 韦宇静 李佳枚 |
| 作者单位： | 1. 广西师范大学 生命科学院, 广西 桂林 541004; 2. 珍稀濒危动植物生态与环境保护省部共建教育部 重点实验室; 广西 桂林 541004 |
| 摘 要： | 以互花米草为实验材料,通过模拟海水河沙培养实验,研究不同浓度镉胁迫对互花米草生理生化的影响。结果表明:随着镉浓度的增大,互花米草叶、根生物量逐渐降低,膜透性、丙二醛、SOD、POD酶活性随着镉浓度的增加而增加,其酶抗性也发挥到最大的程度。随着镉浓度的增加互花米草的光合特性发生较大变化,净光合速率、胞间CO2和气孔导度都下降和减少。 |
| 关 键 词： | 镉 互花米草 光合 生理特性 |
Physiological response of Spartina alterniflora seedlings to cadmium stress |
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| SHI Gui-Yu,LIANG Shi-Chu,HUANG Ya-Li,WEI Yu-Jing,LI Jia-Mei. Physiological response of Spartina alterniflora seedlings to cadmium stress[J]. Guihaia, 2013, 0(6): 812-816 | |
| Authors: | SHI Gui-Yu LIANG Shi-Chu HUANG Ya-Li WEI Yu-Jing LI Jia-Mei |
| Affiliation: | 1. College of Life Sciences, Guangxi Normal University, Guilin 541004, China; 2. Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection, Ministry of Education, Guangxi Normal University, Guilin 541004, China |
| Abstract: | The physiological and biochemical response of Spartina alterniflora seedlings to different concentration of Cd investigated by cultivating the material in the simulated seawater and sand. The results showed that as the concentration of Cd increasing,the biomass of S. alterniflora leaves and roots was decreasing,while the membrane permeability,malondialdehyde(MDA),the enzymatic activity of SOD and POD tended to reduce,so S. alterniflora could make the best of its self-resistance. With the increase of the concentration of cadmium,photosynthesis characteristic of S. alterniflora changed greatly. The net photosynthetic rate,intercellular CO2 concentration(Ci)and stomatal conductance(Gs)dropped and reduced. |
| Keywords: | Cd(cadmium) Spartina alterniflora photosynthetic physiological characteristics |
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