title: Effects of lanthanum on calcium and magnesium contents and cytoplasmic streaming of internodal cells of Chara corallina.
abstract: Biological and environmental effects of lanthanide series of elements have received much attention recently due to their wide applications. In this study, effects of La(3+) treatments on calcium and magnesium concentrations as well as cytoplasmic streaming of internodal cells of Chara corallina were investigated. At all treatment concentrations (10, 100, and 1,000 μM), La(3+) significantly decreased calcium concentrations in the cell-wall fractions after 5-h treatments. Calcium concentrations in the cell contents and magnesium concentrations in the cell-wall fractions were reduced by 100 and 1,000 μM La(3+) treatments. However, cytoplasmic streaming as an indicator of [Ca(2+)](cyt) was only inhibited at the highest La(3+) concentration (1,000 μM). The results suggest that La(3+) may affect cellular calcium homeostasis by actions other than as a simple Ca(2+) antagonist. La(3+) could partially compensate for calcium deficiency at certain concentrations.
authors.affiliation: Key Laboratory of Nuclear Analytical Techniques, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China.
authors.forename: Zijie
authors.initials: Z
authors.lastname: Li
authors.forename: Zhiyong
authors.initials: Z
authors.lastname: Zhang
authors.forename: Ming
authors.initials: M
authors.lastname: Yu
authors.forename: Yunlong
authors.initials: Y
authors.lastname: Zhou
authors.forename: Yuliang
authors.initials: Y
authors.lastname: Zhao
mesh_terms: D002118:Calcium / Q000378:metabolism*; D044784:Chara / Q000187:drug effects* / Q000378:metabolism*; D003595:Cytoplasmic Streaming / Q000187:drug effects*; D007811:Lanthanum / Q000494:pharmacology*; D008274:Magnesium / Q000378:metabolism*
chemical_list: D007811:Lanthanum; D008274:Magnesium; D002118:Calcium