Recently phytoremediation researchers have discovered that Indian mustard (Brassica juncea (L.) Czern) can accumulate high levels of metals, including Zn and Se. The metal accumulating ability of this plant, coupled with the potential to rapidly produce large quantities of shoot biomass, makes this plant ideal for phytoextraction.(6) Beggar’s tick (Bidens alba (L.) DC. var radiata) has been introduced in Thailand for use by bee farms for producing good quality honey. This plant grows well and shows no signs of toxicity caused by elevated levels of As, Cu and Cr (196, 112 and 67 mg/kg, respectively).(7)
In Thailand, research on the metal- accumulating efficiency of crop plants and weeds is still limited. In this study, Brassica juncea (L.) Czern (crop plant) and Bidens alba (L.) DC. var radiata (weed) were selected because they have desirable characteristics such as high shoot biomass, metals tolerance, short life cycle and handling ease. The objectives of this research were to study the accumulation of copper in the shoots and roots of Brassica juncea (L.) Czern (Brassicaceae) and Bidens alba (L.) DC. var radiata (Asteraceae) and to compare the efficiency of copper removal of the two species.
Recently phytoremediation researchers have discovered that Indian mustard (Brassica juncea (L.) Czern) can accumulate high levels of metals, including Zn and Se. The metal accumulating ability of this plant, coupled with the potential to rapidly produce large quantities of shoot biomass, makes this plant ideal for phytoextraction.(6) Beggar’s tick (Bidens alba (L.) DC. var radiata) has been introduced in Thailand for use by bee farms for producing good quality honey. This plant grows well and shows no signs of toxicity caused by elevated levels of As, Cu and Cr (196, 112 and 67 mg/kg, respectively).(7)In Thailand, research on the metal- accumulating efficiency of crop plants and weeds is still limited. In this study, Brassica juncea (L.) Czern (crop plant) and Bidens alba (L.) DC. var radiata (weed) were selected because they have desirable characteristics such as high shoot biomass, metals tolerance, short life cycle and handling ease. The objectives of this research were to study the accumulation of copper in the shoots and roots of Brassica juncea (L.) Czern (Brassicaceae) and Bidens alba (L.) DC. var radiata (Asteraceae) and to compare the efficiency of copper removal of the two species.
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