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EFFECTS OF PB2+ ON ROOT GROWTH, CELL DIVISION, AND NUCLEOLUS OF BRASSICA JUNCEA L.

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The effects of different concentrations (10−5-10−2M) of lead nitrate on root growth and nucleoli in root tip cells of Brassica juncea L. were investigated. The results showed that lead nitrate has a stimulatory effect on root growth at lower concentrations, and an inhibitory effect at higher concentrations. Pb has toxic effects on chromosomal morphology, including c-mitosis and anaphase bridges, and on nucleoli, causing some particulate silver-stained material scattered in the nuclei and inducing irregularly shaped nucleoli. Once the nucleolus was affected, the root growth almost or completely stopped.

Affiliations: 1: Department of Biology, College of Chemistry and Life Sciences, Tianjin Normal University

10.1080/07929978.1999.10676767
/content/journals/10.1080/07929978.1999.10676767
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/content/journals/10.1080/07929978.1999.10676767
1999-04-12
2018-06-21

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