title: A newly found manganese hyperaccumulator--Polygonum lapathifolium Linn.
abstract: In the present work, both field investigation and laboratory experiment were carried out to testify whether Polygonum lapathifolium L. is a potential manganese (Mn) hyperaccumulator. Results from field investigation showed that P. lapathifolium had great tolerance and accumulation to Mn. Mn concentrations in leaves were the highest, varied from 6889.2 mg kg-1 dry weight (DW) to 18841.7 mg kg(-1) DW with the average of 12180.6 mg kg(-1). The values of translocation factor (the concentrations of Mn in leaf to that in root) ranged from 5.72 to 9.53. Results from laboratory experiment illuminated that P. lapathifolium could grow well and show no toxic symptoms even under high Mn stress (16 mmol L(-1)). Although the changes of antioxidant enzymes activities were triggered under Mn stress, the alterations of pigments were not significant (P > 0.05) as compared with control. Total plant biomass and plant height increased with increasing Mn supply. Mn concentrations in leaves and stems were constantly greater than those in roots, the ratio of concentrations in leaves to that in roots were 2.58-6.72 and the corresponding values in stems to that in roots were 1.45-3.18. The results showed that P. lapathifolium is a Mn-hyperaccumulator.
authors.affiliation: a Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education , China , Guilin , China.|c College of Life and Environmental Science, Guilin University of Electronic Technology , Guilin , China.
authors.forename: Kehui
authors.initials: K
authors.lastname: Liu
authors.affiliation: a Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education , China , Guilin , China.|b College of Resource and Environment, Guangxi Normal University , Guilin , China.
authors.forename: Fangming
authors.initials: F
authors.lastname: Yu
authors.affiliation: a Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education , China , Guilin , China.|b College of Resource and Environment, Guangxi Normal University , Guilin , China.
authors.forename: Menglin
authors.initials: M
authors.lastname: Chen
authors.affiliation: a Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education , China , Guilin , China.|b College of Resource and Environment, Guangxi Normal University , Guilin , China.
authors.forename: Zhenming
authors.initials: Z
authors.lastname: Zhou
authors.affiliation: a Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education , China , Guilin , China.|b College of Resource and Environment, Guangxi Normal University , Guilin , China.
authors.forename: Chaoshu
authors.initials: C
authors.lastname: Chen
authors.affiliation: a Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education , China , Guilin , China.|b College of Resource and Environment, Guangxi Normal University , Guilin , China.
authors.forename: Ming Shun
authors.initials: MS
authors.lastname: Li
authors.affiliation: a Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education , China , Guilin , China.|b College of Resource and Environment, Guangxi Normal University , Guilin , China.
authors.forename: Jing
authors.initials: J
authors.lastname: Zhu
mesh_terms: D001673:Biodegradation, Environmental; D052918:Environmental Restoration and Remediation / Q000379:methods*; D008345:Manganese / Q000032:analysis / Q000378:metabolism*; D018515:Plant Leaves / Q000737:chemistry / Q000254:growth & development / Q000378:metabolism; D018517:Plant Roots / Q000737:chemistry / Q000254:growth & development / Q000378:metabolism; D028502:Polygonum / Q000737:chemistry / Q000254:growth & development / Q000378:metabolism*; D012989:Soil Pollutants / Q000032:analysis / Q000378:metabolism*
chemical_list: D012989:Soil Pollutants; D008345:Manganese
keywords: Mn; Polygonum lapathifolium L.; hyperaccumulation