期刊
AQUATIC BOTANY
卷 94, 期 1, 页码 37-43出版社
ELSEVIER
DOI: 10.1016/j.aquabot.2010.11.002
关键词
Antioxidant defense systems; Cell wall; Chelation; Glutathione; Glutathione peroxidase; Phytoremediation
资金
- National Basic Research Program of China [2007CB109303]
- Special Program on Control and Management of Water Pollution of the Chinese Science and Technology [2008ZX07101-006-06]
- Special Research Project of the Chinese Science and Technology [2009ZX8009-129B]
Cadmium (Cd) is a widespread heavy metal pollutant and environmental and human health hazard, which may be partially resolved using green and cost-effective phytoremediation techniques. However, the efficiency of phytoremediation is often limited by the small biomass of Cd-hyperaccumulator plants. Although cattail (Typha angustifolia L) is tolerant of heavy metals and has a high biomass, there is little information available on its detoxification mechanisms for heavy metals, especially Cd. In the present study we investigated the tolerance of cattail to Cd and mechanisms involved in its Cd detoxification. Our results show that: (a) cattail is tolerant of Cd; (b) the root Casparian band, cell wall, vacuole, glutathione (GSH), and glutathione peroxidase (GPX) play important roles in Cd detoxification; and (c) mechanisms of Cd detoxification differ in leaf cell cytoplasm (mainly a GSH-related antioxidant defense system) and root cell cytoplasm (mainly a GSH-related chelation system). In summary, cattail possesses multiple detoxification mechanisms for Cd and is a promising species for phytoremediation of Cd-polluted environments. (C) 2010 Elsevier B.V. All rights reserved.
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