Hyperaccumulators table – 2: Nickel

This list covers known nickel hyperaccumulators, accumulators or plant species tolerant to nickel.

See also:
 * Hyperaccumulators table – 1: Ag, Al, As, Be, Cr, Cu, Hg, Mn, Mo, Naphthalene, Pb, Pd, Se, Zn
 * Hyperaccumulators table – 3: Cd, Cs, Co, Pu, Ra, Sr, U, radionuclides, hydrocarbons, organic solvents, etc.

Notes
 * In the genus Alyssum, free histamin (His) is an important Ni binding ligand that increases in the xylem proportionately to root Ni uptake. There is a close correlation between Ni tolerance, root His concentration, and ATP-PRT transcript abundance. Thus ATP-PRT expression may play a major role in regulating the pool of free His and contributes to the exceptional Ni tolerance of hyperaccumulator Alyssum species. But this is not the complete hyperaccumulator phenotype because His-(GM-)overproducing lines do not exhibit increased Ni concentrations in either xylem sap or shoot tissue.
 * Alpine pennycress or «Alpine Pennygrass» is also found as «Alpine Pennycrest» in (some books).

Reference sources with notes

 * The references are so far mostly from academic trial papers, experiments and generally of exploration of that field.