Table 1.
Relative changes of trace element concentration in shoots (lines) vs. relative changes of shoot biomass (columns) for individual and for all trace elements.a
| Concentration in shoots | Shoot biomass |
|||
|---|---|---|---|---|
| Increase | No change | Decrease | Sum | |
| Zinc | ||||
| Increase | 15.4 | 15.4 | 1.71 | 32.5 |
| No change | 20.5 | 33.3 | 2.56 | 56.4 |
| Decrease | 8.55 | 2.56 | 0.00 | 11.1 |
| Sum | 44.4 | 51.3 | 4.27 | 100 |
| Lead | ||||
| Increase | 25.8 | 1.03 | 0.00 | 26.8 |
| No change | 41.2 | 19.6 | 5.15 | 66.0 |
| Decrease | 2.06 | 4.12 | 1.03 | 7.22 |
| Sum | 69.1 | 24.7 | 6.19 | 100 |
| Nickel | ||||
| Increase | 20.3 | 10.5 | 0.00 | 30.8 |
| No change | 31.6 | 16.5 | 1.50 | 49.6 |
| Decrease | 16.5 | 2.26 | 0.75 | 19.5 |
| Sum | 68.4 | 29.3 | 2.26 | 100 |
| Copper | ||||
| Increase | 8.62 | 27.6 | 5.17 | 41.4 |
| No change | 36.2 | 10.3 | 0.00 | 46.6 |
| Decrease | 8.62 | 3.45 | 0.00 | 12.1 |
| Sum | 53.4 | 41.4 | 5.17 | 100 |
| Cadmium | ||||
| Increase | 22.7 | 10.9 | 0.78 | 34.4 |
| No change | 19.5 | 23.4 | 2.34 | 45.3 |
| Decrease | 16.4 | 3.91 | 0.00 | 20.3 |
| Sum | 58.6 | 38.3 | 3.13 | 100 |
| As concentration in shoot | ||||
| Increase | 13.2 | 5.66 | 0.00 | 18.9 |
| No change | 22.6 | 13.2 | 9.43 | 45.3 |
| Decrease | 24.5 | 11.3 | 0.00 | 35.8 |
| Sum | 60.4 | 30.2 | 9.43 | 100 |
| All metals | ||||
| Increase | 18.5 | 11.0 | 1.00 | 30.5 |
| No change | 29.7 | 20.5 | 3.00 | 53.2 |
| Decrease | 12.2 | 3.83 | 0.33 | 16.3 |
| Sum | 60.3 | 35.3 | 4.33 | 100 |
Values in the table indicate the percentage of studies documenting a given observation. Data were obtained from: Abou-Shanab et al. (2003), Abou-Shanab et al. (2006), Al Agely et al. (2005), Andreazza et al. (2010), Arriagada et al. (2007), Azcón et al. (2009), Bai et al. (2008); Baum et al. (2006), Braud et al. (2009), Brunetti et al. (2011), Burd et al. (1998, 2000), Chen et al. (2003, 2004, 2006, 2007a, 2007b, 2010), Citterio et al. (2005), Dary et al. (2010), Davies et al. (2001), De Maria et al. (2011), Di Gregorio et al. (2006), Dimkpa et al. (2009), Dos Santos Utmazian et al. (2007), Duponnois et al. (2006), Farwell et al. (2006, 2007), Ganesan (2008), Gao et al. (2010), He et al. (2009, 2010), Ike et al. (2007), Jankong et al. (2007), Janoušková et al. (2005), Jiang et al. (2008), Kuffner et al. (2008, 2010), Kumar et al. (2008, 2009), Leung et al. (2006), Liao et al. (2003), Liu et al. (2005), Ma et al. (2009a, 2009b, 2009c), Malcova et al. (2003), Marques et al. (2006), Medina et al. (2006), Nie et al. (2002), Rai et al. (2004), Rajkumar and Freitas (2008a, 2008b), Rajkumar et al. (2006), Reed and Glick (2005), Rodriguez et al. (2008), Safronova et al. (2006), Sell et al. (2005), Sheng and Xia (2006), Sheng et al. (2008a, 2008b, 2008c), Shilev et al. (2001, 2006), Sudova et al. (2007), Tank and Saraf (2009), Trotta et al. (2006), Vivas et al. (2003a, 2003b, 2006), Wang et al. (2005, 2007a, 2007b), Wani et al. (2007), Whiting et al. (2001b), Wu et al. (2006), Xu et al. (2008), Zaidi et al. (2006).