Table 4. Elemental concentrations (micro-PIXE, μg g−1 dry weight) in the morphological structures of the roots of Phyllanthus balgooyi, Phyllanthus securinegioides and Rinorea bengalensis.
| Ni | Si | P | S | Cl | K | Ca | Mn | Fe | Co | Cu | Zn | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Phyllanthus balgooyi | ||||||||||||
| Whole area | 120 (4) | 2600 (180) | 100 (16) | 1310 (40) | 5040 (12) | 6870 (50) | 410 (23) | 29 (3) | 710 (15) | 7 (3) | 3.1 (0.5) | 10.4 (0.7) |
| Epidermis | 180 (14) | 35010 (14) | <113 | 1120 (50) | 320 (25) | 2380 (50) | 860 (27) | 63 (9) | 3540 (50) | 17 (12) | <15 | 15 (7) |
| Cortex | 34 (3) | 450 (3) | 90 (20) | 840 (20) | 7780 (20) | 7950 (70) | 380 (26) | 9 (2) | 163 (8) | <2 | <2.1 | 10 (1) |
| Primary phloem | 1880 (30) | <385 | 330 (60) | 1320 (40) | 1550 (30) | 10480 (40) | 900 (24) | 29 (4) | <10 | 9 (5) | <22 | 23 (6) |
| Primary xylem | 25 (5) | <160 | 230 (36) | 610 (40) | 890 (30) | 4470 (30) | 150 (20) | <4 | <4 | <3 | <6 | <8 |
| Phyllanthus securinegioides | ||||||||||||
| Whole area | 2080 (43) | 8170 (470) | 240 (32) | 2420 (100) | 570 (40) | 4400 (80) | 820 (20) | 44 (2) | 1230 (20) | 6 (4) | 6 (2) | 113 (2) |
| Epidermis | 670 (13) | 34600 (1500) | 75 (24) | 1320 (20) | 360 (16) | 1590 (40) | 460 (10) | 230 (8) | 8330 (110) | 50 (13) | <11 | 18 (4) |
| Cortex | 2910 (50) | 1350 (180) | 330 (30) | 3520 (130) | 750 (30) | 3300 (50) | 250 (10) | 24 (3) | 440 (7) | <3 | 8 (3) | 47 (5) |
| Phloem | 9250 (120) | 190 (40) | 450 (50) | 5220 (240) | 1360 (60) | 11960 (120) | 3250 (40) | 7 (2) | 47 (3) | 7 (6) | 10 (5) | 570 (12) |
| Xylem | 340 (9) | 390 (40) | 300 (30) | 1120 (50) | 230 (12) | 2700 (20) | 280 (9) | 2.8 (0.7) | 14.7 (0.5) | <0.6 | 2.1 (0.5) | 17.7 (0.7) |
| Rinorea bengalensis | ||||||||||||
| Whole area | 14700 (150) | 6310 (650) | 130 (23) | 1580 (90) | 370 (20) | 5570 (60) | 5460 (50) | 25 (2) | 920 (15) | <5 | 25 (7) | 63 (2) |
| Epidermis | 270 (8) | 11860 (800) | 73 (14) | 480 (12) | 220 (13) | 780 (17) | 590 (10) | 70 (3) | 3170 (50) | 13 (5) | <3 | 29 (2) |
| Cortex | 10060 (140) | <128 | 220 (30) | 2020 (110) | 480 (20) | 9460 (130) | 5530 (100) | 5 (3) | 132 (5) | <5 | 21 (8) | 23 (4) |
| Phloem | 56400 (400) | <110 | 93 (25) | 1450 (80) | 690 (13) | 10560 (80) | 8410 (60) | 33 (3) | 67 (2) | <11 | 78 (21) | 250 (20) |
| Xylem | 910 (14) | 260 (14) | 220 (20) | 420 (25) | 140 (8) | 2660 (20) | 1150 (8) | 2.6 (0.6) | 6.4 (0.5) | <0.8 | 3.6 (0.6) | 13.5 (0.8) |
The results were obtained from PIXE spectra extracted from regions representing different morphological structures, and analysed using GeoPIXE software. Errors of analysis (±1 σ uncertainty) are shown in brackets.