title: Lead induced changes in growth and micronutrient uptake of Jatropha curcas L.
abstract: Effects of lead treatment on growth and micronutrient uptake in Jatropha curcas L. seedlings were assessed by means of microcosm experiments. Results suggested that superoxide dismutase (SOD) activity increased with increasing lead concentration. There was significant positive correlation between lead treatment concentration and SOD and peroxidase activity. Catalase activity was initiated under lower lead stress but, was inhibited under higher lead exposure. Lead had a stimulating effect on seedlings height and leaf area at lower lead concentrations. The J. curcas can accumulate higher amounts of available lead from soil but can translocate only low amounts to the shoots. Results indicating SOD and peroxidase activity in J. curcas seedlings played an important role in resisting the oxidative stress induced by lead. The addition of lead significantly increased the content of zinc in plant tissue and enhanced the transport of iron from roots to shoots but contributed to a decrease in measured copper, iron, and manganese content.
authors.affiliation: Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, 430074, China.
authors.forename: Xiao
authors.initials: X
authors.lastname: Shu
authors.forename: QuanFa
authors.initials: Q
authors.lastname: Zhang
authors.forename: WeiBo
authors.initials: W
authors.lastname: Wang
mesh_terms: D001692:Biological Transport / Q000187:drug effects; D004305:Dose-Response Relationship, Drug; D031286:Jatropha / Q000187:drug effects* / Q000201:enzymology / Q000254:growth & development / Q000378:metabolism*; D007854:Lead / Q000378:metabolism / Q000633:toxicity*; D018977:Micronutrients / Q000378:metabolism*; D018384:Oxidative Stress / Q000187:drug effects; D018515:Plant Leaves / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism; D018517:Plant Roots / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism; D036226:Seedlings / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism; D012987:Soil / Q000737:chemistry; D012989:Soil Pollutants / Q000378:metabolism / Q000633:toxicity*; D013482:Superoxide Dismutase / Q000378:metabolism
chemical_list: D018977:Micronutrients; D012987:Soil; D012989:Soil Pollutants; D007854:Lead; D013482:Superoxide Dismutase