Lead Accumulation and its Effects on Growth and Biochemical Parameters in  Tagetes erecta L

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Lead Accumulation and its Effects on Growth and Biochemical Parameters in Tagetes erecta L

Authors
Type
Published Article
Journal
International Journal of Life-Sciences Scientific Research
Publisher
Marwah Infotech
Publication Date
Jul 09, 2017
Volume
3
Issue
4
Pages
1142–1147
Identifiers
DOI: 10.21276/ijlssr.2017.3.4.7
Source
MyScienceWork
License
Green

Abstract

Tagetes erecta L. was raised in pots containing soil treated with various concentrations of Pb(NO 3) 2 (500, 1000, 1500, 2000 and 2500mg/kg). At maturity plants were separated into root, stem, leaves and inflorescence and lead accumulated in each part was quantified. The effects of lead accumulation on growth was analyzed by the measurement of various growth parameters like root and shoot length, fresh and dry weight of root and shoot and total leaf area per plant. Moreover effect of lead accumulation on biochemical parameters was checked by quantitative estimation of various biochemical parameters like chlorophyll, total protein, free amino acids, total sugar, reducing sugar and starch. Results showed that there is no remarkable negative effect of accumulation of lead on the morphological growth of the plant. Biochemical analysis showed that amount of total protein continuously decreased whereas that of free amino acids continuously increased with increasing concentrations of lead. Amount of chlorophyll, total sugar, reducing sugar and starch contents continuously increased till mid-level i.e., Pb 1500 mg/kg and then continuously decreased at higher concentrations. Results of quantitative estimation of Pb in root, stem, leaves and inflorescence showed that roots accumulated highest amount of Pb followed by stem and leaves, whereas inflorescence contained least amount of Pb.

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