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Influences of Lead (II) Chloride on the Nitrogen Metabolism of Spinach

Influences of Lead (II) Chloride on the Nitrogen Metabolism of Spinach

Xiao Wu, Chao Liu, Chunxiang Qu, Hao Huang, Xiaoqing Liu, Liang Chen, Mingyu Su, Fashui Hong

Biol Trace Elem Res. 2008 Mar;121(3):258-65.

PMID: 17955201

Abstract:

Lead (Pb(2+)) is a well-known highly toxic element. The mechanisms of the Pb(2+) toxicity are not well understood for nitrogen metabolism of higher plants. In this paper, we studied the effects of various concentrations of PbCl(2) on the nitrogen metabolism of growing spinach. The experimental results showed that Pb(2+) treatments significantly decreased the nitrate nitrogen (NO(-)(3)-N) absorption and inhibited the activities of nitrate reductase, glutamate dehydrogenase, glutamine synthase, and glutamic-pyruvic transaminase of spinach, and inhibited the synthesis of organic nitrogen compounds such as protein and chlorophyll. However, Pb(2+) treatments increased the accumulation of ammonium nitrogen NH(+)(4)-N)in spinach cell. It implied that Pb(2+) could inhibit inorganic nitrogen to be translated into organic nitrogen in spinach, thus led to the reduction in spinach growth.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP7758954	Lead(II) chloride		7758-95-4	Price

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