Table 2.
Summary of NH4+ effects on plant Al tolerance relative to NO3-: (+) enhancement, (-) decrease, and (0) no change.
| Taxon | Effects | Reference |
|---|---|---|
| Holcus lanatus | + | McCain and Davies, 1983 |
| Deschampsia flexuosa, Holcus lanatus, Bromus erectus | + | Rorison, 1985 |
| Spruce and beech | + | Van Praag et al., 1985a |
| Glycine max | + | Klotz and Horst, 1988a,b |
| Secale cereal, Lupinus luteus | + | Grauer and Horst, 1990 |
| Pinus rigida | + | Cumming, 1990a; Cumming and Weinstein, 1990a; Schier and McQuattie, 1999a |
| Triticosecale | + | Antunes and Antonieta Nunes, 1997; Domingues, 2010 |
| Melastoma malabathricum, Acacia mangium, Melaleuca cajuputi | + | Watanabe et al., 1998 |
| Oryza sativa | + | Zhao et al., 2009, 2013b; Wang et al., 2015 |
| Lespedeza bicolor | + | Chen et al., 2010 |
| Sorghum bicolor | + or -b | Tan et al., 1992 |
| Sorghum bicolor | 0 | Keltjens, 1987 |
| Picea abies | 0 | Godbold et al., 1988 |
| Mucuna pruriens | 0 | Hairiah et al., 1994 |
| Triticum aestivum | - | Fleming, 1983; Taylor and Foy, 1985a,b,c |
aStudy was conducted using sand culture irrigated with nutrient solutions. Studies not marked by superscript letter were conducted using hydroponic systems. bEffect was dependent on plant genotypes.