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摘要
The metal accumulation potential of Pelargonium graveolens L'Her. grown with various amendments of heavy metal (HM) rich tannery sludge (TS) was studied. Root accumulated more metals followed by leaves and stem. At 50:50 ratio of TS and soil, translocation factor (TF) for Cd, Co, Ni, Pb and Cr were 0.77, 0.74, 1.09, 0.81 and 0.70, respectively. Chlorophyll a, chlorophyll b, carotenoid content and biomass of plant were high at 50:50 ratio of sludge and soil. Maximum oil content was observed at the same ratio of sludge and soil. No detectable amount of metal was found in the oil of P. graveolens. Citronellol, geraniol (C/G) ratio was close to 1 at 50:50 ratio of TS and soil, which is considered to be the best oil quality and most preferred by the industries. HMs present in TS increased oxidative stress in plant resulting in increased level of superoxide dismutase (SOD), catalase (CAT), peroxidase (POD), praline and melondialdehyde (MDA) at all ratios of TS and soil as compared to control. At 100% TS without soil antioxidant activity decreased which indicated that high concentration of HMs impaired the oxygen scavenging function. Translocation factor emphasized that 50:50 ratio of TS and soil were suitable for extraction of various metals without affecting the oil yield of P. graveolens. So, this plant can be suggested as a good candidate to be grown in metal polluted soil vis-a-vis for phytostabilization of metals.
- 出版日期2015-1
- 单位河北医科大学
