Chand Sukhmal, Singh Geetu, Patra D D
a Central Institute of Medicinal and Aromatic Plants (CIMAP) , Lucknow , India.
Int J Phytoremediation. 2016 Aug 2;18(8):754-60. doi: 10.1080/15226514.2015.1131236.
An investigation was carried out to evaluate the effect of heavy metal toxicity on growth, herb, oil yield and quality and metal accumulation in rose scented geranium (Pelargonium graveolens) grown in heavy metal enriched soils. Four heavy metals (Cd, Ni, Cr, and Pb) each at two levels (10 and 20 mg kg-1 soil) were tested on geranium. Results indicated that Cr concentration in soil at 20 mg kg-1 reduced leaves, stem and root yield by 70, 83, and 45%, respectively, over control. Root growth was significantly affected in Cr stressed soil. Nickel, Cr, and Cd concentration and accumulation in plant increased with higher application of these metals. Chromium, nickel and cadmium uptake was observed to be higher in leaves than in stem and roots. Essential oil constituents were generally not significantly affected by heavy metals except Pb at 10 and 20 ppm, which significantly increased the content of citronellol and Ni at 20 ppm increased the content of geraniol. Looking in to the higher accumulation of toxic metals by geranium and the minimal impact of heavy metals on quality of essential oil, geranium can be commercially cultivated in heavy metal polluted soil for production of high value essential oil.
开展了一项调查，以评估重金属毒性对生长在富含重金属土壤中的玫瑰天竺葵（香叶天竺葵）的生长、草本植物、精油产量和质量以及金属积累的影响。在天竺葵上测试了四种重金属（镉、镍、铬和铅），每种重金属有两个水平（10和20毫克/千克土壤）。结果表明，土壤中铬浓度为20毫克/千克时，与对照相比，叶片、茎和根的产量分别降低了70%、83%和45%。铬胁迫土壤对根系生长有显著影响。随着这些金属施用量的增加，植物中镍、铬和镉的浓度及积累量增加。观察到叶片中铬、镍和镉的吸收量高于茎和根。除了10和20 ppm的铅显著增加了香茅醇的含量，以及20 ppm的镍增加了香叶醇的含量外，重金属一般对精油成分没有显著影响。鉴于天竺葵对有毒金属的高积累以及重金属对精油质量的最小影响，天竺葵可在重金属污染土壤中进行商业化种植，以生产高价值的精油。
