Effects of heavy metals and strontium on division of root cap cells and meristem structural organization

10.1007/s11183-008-1001-8

“…Nickel is predominantly accumulated in the protoplasts, while other metals examined are retained in the apoplast [32,33]. Nickel is predominantly accumulated in the protoplasts, while other metals examined are retained in the apoplast [32,33].…”

“…1l, 1m) were only observed in the surface cells of the root cap, while Ni content in all root cap cells was substantially lower than in the absence of Ca, which might be related to competition for common binding sites during the entry and transport of ions in the root [32,33,36]. For example, in the presence of Ca (3 mM), Pb and Sr (Figs.…”

“…Hence, the toxic impact will be stronger in meristematic cells, especially in the case of metal accumulation in the cytoplasm, which seems possible for Ni [12,32,33,36]. Even at equal metal content per cell, the metal content calculated per volume unit would be much higher for small meristematic cells than for large-sized mature root cells.…”

“…The content of Cd and Pb in the quiescent center cells of maize was lower than in surrounding cells, although these cells did not differ appreciably in Sr content [11,33]. Low content of Pb in quiescent center cells was also observed in roots of Raphanus sativus [42] and Allium cepa [41].…”

“…The Ni content in the maize quiescent center was only slightly lower than in surrounding meristematic tissues [32,33]. The Ni content in the maize quiescent center was only slightly lower than in surrounding meristematic tissues [32,33].…”