2014 Effect of cadmium on growth, photosynthesis,英文教材.pdf

b i o m a s s a n d b i o e n e r g y 6 7 ( 2 0 1 4 ) 1 7 9 e 1 8 7 Available online at ScienceDirect /locate/biombioe Effect of cadmium on growth, photosynthesis, mineral nutrition and metal accumulation of an energy crop, king grass (Pennisetum americanum 3 P. purpureum) Xingfeng Zhang a,b, Xuehong Zhang b, Bo Gao b, Zhian Li a, Hanping Xia a,*, Haifang Li c, Jian Li a a Ecology and Environmental Sciences Center, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, PR China b The Guangxi Key Laboratory of Environmental Engineering, Protection and Assessment, Guilin University of Technology, Guilin 541004, China c College of Tourism, Guilin University of Technology, Guilin 541004, China a r t i c l e i n f o a b s t r a c t Article history: An experiment was conducted to evaluate the effect of cadmium (Cd) on growth, photo- Received 5 September 2012 synthesis, mineral nutrition and Cd accumulation of an energy crop, king grass (Pennisetum Received in revised form purpureum K. Schumach P. thyphoideum Rich). Leaf shape was more sensitive to Cd than 4 August 2013 biomass and root length. Leaves had no visual toxic symptoms under 8e100 mg kg1 Cd. Accepted 22 April 2014 High Cd pollution significantly increased the chlorophyll content of young leaves but Available online 22 May 2014 showed no effect on mature leaves. Cd enhanced the maximum net photosynthetic rate (Amax), light compensation point (LCP) and light saturation point (LSP). For roots, Cd had a Keywords: