Uptake and accumulation of lead by roots, hypocotyls and shoots of Indian mustard [ Brassica juncea (L.)]

• Published in: Bioresource technology Vol. 71; no. 3; pp. 273 - 277
• Main Authors: Liu, Donghua, Jiang, Wusheng, Liu, Changjun, Xin, Changhong, Hou, Wenqiang
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01-02-2000; Elsevier Science
• Subjects: Accumulation; Biological and medical sciences; Brassica juncea; Brassica juncea L; chlorosis; Fundamental and applied biological sciences. Psychology; Growth kinetics; growth retardation; hypocotyls; lead; Lead compounds; lead nitrate; Marah; Non agrochemicals pollutants; Pb 2; Phytopathology. Animal pests. Plant and forest protection; Plants (botany); Pollution effects and side effects of agrochemicals on crop plants and forest trees. Other anthropogenic factors; Pollution effects. Side effects of agrochemicals; root growth; roots; seedlings; shoots; Solutions; Uptake; Pb 2; Uptake; Accumulation; Brassica juncea L; Root; Lead II Nitrates; Metal ion; Oil plant(vegetal); Stem; Heavy metal; Absorption; Hypocotyl; Phytotoxicity; Cruciferae; Dicotyledones; Angiospermae; Spermatophyta; Pollutant effect; Biological accumulation; Brassica juncea; Chemical contamination
• ISSN: 0960-8524; 1873-2976
• DOI: 10.1016/S0960-8524(99)00082-6

The effects of different concentrations of lead nitrate on root, hypocotyl and shoot growth of Indian mustard (
Brassica juncea var.
Megarrhiza), and the uptake and accumulation of Pb
2+ by its roots, hypocotyls and shoots were investigated in the present study. The concentrations of lead nitrate (Pb(NO
3)
2) used were in the range of 10
−5–10
−3 M. Root growth decreased progressively with increasing concentration of Pb
2+ in solutions. The seedlings exposed to 10
−3 M Pb exhibited substantial growth reduction and produced chlorosis.
Brassica juncea has considerable ability to remove Pb from solutions and accumulate it. The Pb content in roots of
B. juncea increased with increasing solution concentration of Pb
2+. The amount of Pb in roots of plants treated with 10
−4, 10
−3 and 10
−5 M Pb
2+ were 184-, 37- and 6-fold, respectively, greater than that of roots of the control plant. However, the plants transported and concentrated only a small amount of Pb in their hypocotyls and shoots, except for the group treated with 10
−3 M Pb
2+.