title: Pb hyperaccumulation and tolerance in common buckwheat (Fagopyrum esculentum Moench).
abstract: Common buckwheat grown in Pb-contaminated soil was found to accumulate a large amount of Pb in its leaves (8,000 mg/kg DW), stem (2,000 mg/kg DW), and roots (3,300 mg/kg DW), without significant damage. This indicates that buckwheat is a newly recognized Pb hyperaccumulator, which is defined as a plant containing over 1,000 mg/kg of Pb in its shoots on a dry-weight basis. Moreover, it was shown that application of the biodegradable chelator methylglycinediacetic acid trisodium salt at concentrations of up to 20 mmol/kg resulted in a more than five times higher concentration of Pb in the shoot without notable growth inhibitation at up to 10 mmol/kg. These results indicate that buckwheat is a potential phytoremediator of Pb-contaminated soils.
authors.affiliation: Biotechnology Group, Energy Application R&D Center, Chubu Electric Power Co., Ohdaka-cho, Midori-ku, Nagoya, Japan. tamura.hideo@chuden.co.jp
authors.forename: Hideo
authors.initials: H
authors.lastname: Tamura
authors.forename: Munechika
authors.initials: M
authors.lastname: Honda
authors.forename: Takeshi
authors.initials: T
authors.lastname: Sato
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Kamachi
mesh_terms: D000222:Adaptation, Physiological; D019612:Fagopyrum / Q000254:growth & development / Q000378:metabolism* / Q000502:physiology; D007854:Lead / Q000032:analysis / Q000378:metabolism*; D012987:Soil / Q000032:analysis
chemical_list: D012987:Soil; D007854:Lead