title: Different Growth and Physiological Responses to Cadmium of the Three Miscanthus Species.
abstract: Miscanthus has been proposed as a promising crop for phytoremediation due to its high biomass yield and remarkable adaptability to different environments. However, little is known about the resistance of Miscanthus spp. to cadmium (Cd). To determine any differences in resistance of Miscanthus to Cd, we examined plant growth, net photosynthetic rate (Pn), activities of anti-oxidant and C4 photosynthetic enzymes, concentrations of Cd in leaves and roots, and observed the chloroplast structure in three Miscanthus species treated with 0, 10, 50, 100 or 200 μM Cd in solutions. Miscanthus sinensis showed more sensitivity to Cd, including sharp decreases in growth, Pn, PEPC activity and damage to chloroplast structure, and the highest H2O2 and Cd concentrations in leaves and roots after Cd treatments. Miscanthus sacchariflorus showed higher resistance to Cd and better growth, had the highest Pn and phosphoenolpyruvate carboxylase (PEPC) activities and integrative chloroplast structure and the lowest hydrogen peroxide (H2O2) and leaf and root Cd concentrations. The results could play an important role in understanding the mechanisms of Cd tolerance in plants and in application of phytoremediation.
authors.affiliation: State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou, China.
authors.forename: Haipeng
authors.initials: H
authors.lastname: Guo
authors.affiliation: Academy of Agricultural Sciences of Ningbo City, Ningbo, China.
authors.forename: Chuntao
authors.initials: C
authors.lastname: Hong
authors.affiliation: Nurturing Station for the State Key Laboratory of Subtropical Silviculture, Zhejiang A & F University, Linan, Hangzhou, China.
authors.forename: Xiaomin
authors.initials: X
authors.lastname: Chen
authors.affiliation: State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou, China.
authors.forename: Yanxia
authors.initials: Y
authors.lastname: Xu
authors.affiliation: State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou, China.
authors.forename: Dean
authors.initials: D
authors.lastname: Jiang
authors.affiliation: Nurturing Station for the State Key Laboratory of Subtropical Silviculture, Zhejiang A & F University, Linan, Hangzhou, China.
authors.forename: Bingsong
authors.initials: B
authors.lastname: Zheng
mesh_terms: D000975:Antioxidants / Q000378:metabolism; D002104:Cadmium / Q000494:pharmacology*; D002734:Chlorophyll / Q000378:metabolism; D006861:Hydrogen Peroxide / Q000378:metabolism; D008315:Malondialdehyde / Q000378:metabolism; D010788:Photosynthesis / Q000187:drug effects; D006109:Poaceae / Q000187:drug effects* / Q000254:growth & development* / Q000378:metabolism / Q000502:physiology; D012989:Soil Pollutants / Q000494:pharmacology*; D013045:Species Specificity; D013312:Stress, Physiological / Q000187:drug effects
chemical_list: D000975:Antioxidants; D012989:Soil Pollutants; D002104:Cadmium; D002734:Chlorophyll; D008315:Malondialdehyde; D006861:Hydrogen Peroxide