Effect of Mn toxicity on morphological and physiological changes in two Populus cathayana populations originating from different habitats
文献类型：期刊论文
| 作者 | Lei, Y; Chen, K; Tian, XG; Korpelainen, H; Li, CY; Li, CY, Chinese Acad Sci, Chengdu Inst Biol, POB 416, Chengdu 610041, Peoples R China. |
| 刊名 | TREES-STRUCTURE AND FUNCTION
 |
| 出版日期 | 2007 |
| 卷号 | 21期号:5页码:569_580 |
| 关键词 | Manganese Treatment Oxidative Stress Phytochelatins Phenolics Compounds Poplar |
| ISSN号 | 0931-1890 |
| 产权排序 | 2 |
| 英文摘要 | The cuttings of Populus cathayana were exposed to four different manganese (Mn) concentrations (0, 0.1, 0.5 and 1 mM) in a greenhouse to investigate the toxicity of Mn and the detoxifying responses of woody plants. Two contrasting populations of P. cathayana, which were from wet and dry climate regions in western China, respectively, were examined in our study. The results showed that high concentration of Mn caused significant decrease in shoot height, biomass accumulation, and leaf number and leaf areas. Injuries to the anatomical features of leaves were also found as the reduced thickness of palisade and spongy parenchyma, the decreased density in the conducting tissue and the collapse and split in the meristematic tissue in the central vein. Moreover, Mn treatments caused the accumulation of hydrogen peroxide (H2O2), and then resulted in oxidative stress indicated by the oxidation of proteins and DNA. Many physiological responses were employed to cope with the toxicity of Mn, including the increase in the contents of non-protein thiol (NP-SH), phytochelatins (PCs) and phenolics compounds and the stimulated activities of guaiacol peroxidase (GPX) and polyphenol oxidase (PPO) for the chelation of Mn and for the antioxidation of reactive oxygen species. The population from dry climate habitat showed a lower leaf concentration of Mn, higher contents of the chelators, and higher activities of GPX and PPO than did the wet climate population at the same Mn treatment, thereby possessing a superior Mn tolerance. In both populations, most of the Mn was accumulated in the shoot, which is favorable regarding phytoremediation. |
| 学科主题 | Forestry |
| 语种 | 英语 |
| 公开日期 | 2011-07-08 |
| 源URL | [http://210.75.237.14/handle/351003/22024]  |
| 专题 | 成都生物研究所_生态研究 |
| 通讯作者 | Li, CY, Chinese Acad Sci, Chengdu Inst Biol, POB 416, Chengdu 610041, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Lei, Y,Chen, K,Tian, XG,et al. Effect of Mn toxicity on morphological and physiological changes in two Populus cathayana populations originating from different habitats[J]. TREES-STRUCTURE AND FUNCTION,2007,21(5):569_580. |
| APA | Lei, Y,Chen, K,Tian, XG,Korpelainen, H,Li, CY,&Li, CY, Chinese Acad Sci, Chengdu Inst Biol, POB 416, Chengdu 610041, Peoples R China..(2007).Effect of Mn toxicity on morphological and physiological changes in two Populus cathayana populations originating from different habitats.TREES-STRUCTURE AND FUNCTION,21(5),569_580. |
| MLA | Lei, Y,et al."Effect of Mn toxicity on morphological and physiological changes in two Populus cathayana populations originating from different habitats".TREES-STRUCTURE AND FUNCTION 21.5(2007):569_580. |
入库方式： OAI收割
来源：成都生物研究所
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