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Table. 1 Soil pH, strontium nitrate (Sr(NO3)2)- and diethylene triamine pentaacetic acid (DTPA)-extractable Zn concentrations and total Zn concentrations of rhizosphere soils collected from the native habitat of D. subsp. pilosum and D. subsp. sumatranum. The number of samples is 4 for each subspecies; pH and concentrations are given as ranges and means

From: Isotopic signatures reveal zinc cycling in the natural habitat of hyperaccumulator Dichapetalum gelonioides subspecies from Malaysian Borneo

Parameter Dichapetalum gelonioides subsp. pilosum Dichapetalum gelonioides subsp. sumatranum
pH 4.35–4.95
[4.70]
4.80–4.95
[4.85]
Sr(NO 3 ) 2 -Zn (µg g − 1 ) 0.05–4.0
[1.5]
0.65–6.0
[3.0]
DTPA-Zn (µg g − 1 ) 0.75–5.5
[2.05]
0.75–8.5
[4.5]
Total Zn (µg g − 1 ) 10–45
[25]
55–65
[60]