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363409 
Journal Article 
Phytoextraction of lead by marigold and chrysanthemum 
Ramana, S; Biswas, AK; Ajay; Rao, AS 
2008 
13 
3 
297-299 
Chrysanthemum and marigold [? Calendula officinalis] were grown in the pots at five levels of lead (0, 100, 150, 200, 250 and 500 ppm). At lower levels, the applied Pb promoted growth of the plants but at the highest level suppressed the growth. The concentration of Pb in the tissues followed the order: root>stem>leaf>flower. Chrysanthemum recorded higher concentration of Pb in root (649 µg g-1 dw) at 500 ppm of applied Pb than marigold (587 µg g-1 dw) at the same level of Pb. Marigold because of its high biomass recorded higher total Pb uptake than chrysanthemum. Therefore, marigold could have a great prospective as a phyremediator of soils contaminated with moderate to relatively high levels of Pb. 
application rates; chrysanthemums; flowers; growth; heavy metals; hyperaccumulator plants; hyperaccumulators; lead; leaves; metal tolerance; phytoremediation; roots; stems; Calendula officinalis; Chrysanthemum; Calendula; Asteraceae; Asterales; dicotyledons; angiosperms; Spermatophyta; plants; eukaryotes; Horticultural Crops (FF003) (New March 2000); Plant Physiology and Biochemistry (FF060); Plant Toxicology (FF800); Environmental Tolerance of Plants (FF900); Industrial Wastes and Effluents (XX400)