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| 互花米草幼苗对重金属镉胁迫的生理响应 |
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石贵玉1,2, 粱士楚1,2, 黄雅丽1, 韦宇静1, 李佳枚1
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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;3.广西 桂林 541004
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| 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 |
| DOI：10.3969/j.issn.1000-3142.2013.06.017 |
| 分类号:Q948 |
| Fund project: |
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| Physiological response of Spartina alterniflora seedlings to cadmium stress |
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SHI Gui-Yu1,2, LIANG Shi-Chu1,2, HUANG Ya-Li1, WEI Yu-Jing1, LI Jia-Mei1
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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
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| 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. |
| Key words: Cd(cadmium) Spartina alterniflora photosynthetic physiological characteristics |
