An assessment of heavy metals tolerance should be based upon a comprehensive analysis of the interaction
between the accumulation of heavy metals in plants and the metal's status in soils. By specific review several of the
total concentration permissible limits of heavy metals in plants and soils can be demonstrated for Stevia plant to the
comparison as the control and the results can be assessed as heavy metals tolerance in the plant of Stevia rebaudiana.
The total concentration of heavy metals normal range in plants, normal range in soils and toxic soils for plants listed
in Table 1 are for to compare and information only. If the other facts are constants, the uptake of a metal by different
plant species may be compared.