This value is considerably high compared
to PT50 values reported by several authors for many different species
(e.g. 0.01 mg g1 Cu for shoots of Agrostis gigantea, Paschke and
Redente, 2002; 0.02 mg g1 Cu for shoots of Lactuca sativa and
0.03 mg g1 Cu for shoots of Raphanus sativa, Lamb et al., 2012).
Juang et al. (2012) reported that Cu phytotoxicity in grapevine cuttings
was stimulated at stem Cu concentrations greater than