Two lead-hyperaccumulator: Pogonatherum crinitum and Lsache globosa
Pb超富集植物金丝草(Pogonatherum crinitum)、柳叶箬(Lsache globosa)

It is key step for phytoremediation to find heavy metal hyperaccumulator,however,a few lead-hyperaccumulators have been found in China.The plants grew in Youxi and Liancheng mining areas of Fujian Province were investigated and heavy metal concentrations in different organs of each plant were measured.Two new potential lead-hyperaccumulator of Pogonatherum crinitum and Lsache globosa were firstly found.The results showed that the Pb concentration in aboveground of Pogonatherum crinitum and Lsache globosa were 1 231.80 mg/kg and 1 818.40 mg/kg,their Pb transport coefficients were 1.32 and 6.5,respectively.The Pb concentration and transport coefficients were exceeded the standard of lead-hyperaccumulator.The Pb simulated experiment in soil pot showed that the Pb concentration in abovegruound of Pogonatherum crinitum and Lsache globosa were exceeded 1 000 mg/kg which was the critical standard of lead-hyperaccumulator,and the Pb transport coefficient exeeded 1 under Pb press of 5 000 mg/kg.The maximum Pb concentration in aboveground and roots of Pogonatherum crinitum and Lsache globosa were 3 789.84 mg/kg,4 964.76 mg/kg,and 3 411.56 mg/kg,1 523.02 mg/kg,respectively under Pb press of 18 000 mg/kg.