Ecophysiological responses of Jussiaea rapens to cadmium exposure
文献类型：期刊论文
| 作者 | Tao, Ling; Li, Ming; Zhang, Li Jing; Li, Wei |
| 刊名 | AQUATIC BOTANY
 |
| 出版日期 | 2008-05-01 |
| 卷号 | 88期号:4页码:347-352 |
| 关键词 | cadmium SOD activity root vitality chlorophyll photosynthesis chlorophyll fluorescence Jussiaea rapens |
| ISSN号 | 0304-3770 |
| DOI | 10.1016/j.aquabot.2008.01.002 |
| 英文摘要 | Shoots of Jussiaea rapens Linn were exposed to nutrient solutions containing 0, 7, 15, 30, 60 mg L-1 cadmium (Cd2+) and the effects on plant physiology investigated after treatment for 2 and 5 days. The net photosynthesis rate was inhibited by 54.8-62.7%, but only at the two highest [Cd2+]. Stomatal conductance showed an initial decline from 0.01 to 0.07 mol m(-2) s(-1) after a 2-d exposure to high [Cd2+] but recovered after a 5-d exposure. The Chl fluorescence parameters F-v/F-m, qP and ETR also declined by 16, 87, and 90%, respectively, after 5-d at the highest [Cd2+], which is consistent with damage to the activity of Photosystem II. Chlorophyll a (Chl a), and b and total chlorophyll (Chl) all exhibited content reductions, though in the case of Chl b it required a 5-d exposure. Significant increases in superoxide dismutase (SOD) activity were observed at all. [Cd2+], the greatest increase being 149%. Likewise, carotenoid content increased by five-fold relative to the untreated control values. The increase in SOD activity and carotenoid suggests that one effect of the Cd2+ caused oxidative stress in J. rapens. Root vitality was also negatively influenced by all Cd2+ treatments. However, the [Cd2+] values inhibiting the photosynthetic parameters were greater than those reported for several other species, which suggests that J. rapens may have some degree of tolerance to this toxic metal. (c) 2008 Published by Elsevier B.V. |
| WOS研究方向 | Plant Sciences ; Marine & Freshwater Biology |
| 语种 | 英语 |
| WOS记录号 | WOS:000255163900010 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://202.127.146.157/handle/2RYDP1HH/1098]  |
| 专题 | 中国科学院武汉植物园 |
| 通讯作者 | Li, Wei |
| 作者单位 | Chinese Acad Sci, Wuhan Bot Garden, Lab Aquat Plant Biol, Wuhan 430074, Hubei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Tao, Ling,Li, Ming,Zhang, Li Jing,et al. Ecophysiological responses of Jussiaea rapens to cadmium exposure[J]. AQUATIC BOTANY,2008,88(4):347-352. |
| APA | Tao, Ling,Li, Ming,Zhang, Li Jing,&Li, Wei.(2008).Ecophysiological responses of Jussiaea rapens to cadmium exposure.AQUATIC BOTANY,88(4),347-352. |
| MLA | Tao, Ling,et al."Ecophysiological responses of Jussiaea rapens to cadmium exposure".AQUATIC BOTANY 88.4(2008):347-352. |
入库方式： OAI收割
来源：武汉植物园
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