A Physiological behavior and tolerance of Lactuca sativa to lead nitrate and silver nitrate heavy metals.

Brazilian Journal of Biology = Revista Brasleira De Biologia
J D O SantosJ M S J Pavão

Abstract

This study goal to evaluate the effects of different concentrations of lead (Pb) and silver (Ag) on germination, initial growth and anatomical alterations of Lactuca sativa L. Plants use various mechanisms to reduce the impacts caused by anthropic action, such as xenobiotic elements of soils and water contaminated by heavy metals. These metals were supplied as lead nitrate and silver nitrate and the following treatments were established: control for both metals, maximum dose of heavy metals, for arable soils, allowed by the National Council of the Environment (Ag = 25 mg. Kg-1, Pb = 180 mg. Kg-1), double (Ag = 50 mg. Kg-1, Pb = 360 mg. Kg-1) and triple (Ag = 75 mg. Kg-1, Pb = 540 mg. Kg -1) of this dosage. Vigor and germination tests of the seeds and possible anatomical changes in the leaves and roots of lettuce plants were performed. The species showed a high capacity to germinate under Pb and Ag stress, and the germination was never completely inhibited; however, the germination decreased with increasing Pb concentrations, but not under Ag stress. The use of increasing doses of metals reduced seed vigor and increased chlorophyll content. An increase in biomass was also observed in plants from treatments submitted to Pb. The p...Continue Reading

References

Dec 18, 2015·Annals of Occupational and Environmental Medicine·Hwan-Cheol KimYoung-Seoub Hong
May 20, 2017·Environmental Science and Pollution Research International·Fatemeh ShahbaziRasool Zamani-Ahmadmahmoodi
Apr 24, 2018·Frontiers in Plant Science·Shalini Tiwari, Charu Lata
Jan 12, 2019·Metallomics : Integrated Biometal Science·Marwa A IsmaelChengxiao Hu
Feb 12, 2019·Environment International·Prabhat Kumar RaiKi-Hyun Kim

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