Table 1.

Aluminum tolerance and NH₄⁺/NO₃^- preference of plant species.

Taxon	Al tolerance	NH4+/NO3- preference	Reference
Vaccinium angustifolium	Tolerant	NH4+	Townsend, 1966; Townsend and Blatt, 1966
Deschampsia flexuosa	Tolerant	NH4+	Rorison, 1985
Oxalis acetosella, Carex pilulifera, Festuca gigantea, Poa nemoralis, Deschampsia flexuosa, Stellaria holostea, Rumex acetosella	Tolerant	NH4+	Falkengren-Grerup, 1995
Camellia sinensis	Tolerant	NH4+	Ruan et al., 2007
Oryza sativa subsp. japonica	Tolerant	NH4+	Zhao et al., 2013b
Holcus lanatus, Bromus erectus	Sensitive	NO3-	Rorison, 1985
Hordeum vulgare	Sensitive	NO3-	Malhi et al., 1988
Triticum aestivum	Sensitive	NO3-	Cramer and Lewis, 1993; Famoso et al., 2010
Urtica dioica, Ficaria verna, Melandrium rubrum, Aegopodium podagraria, Geum urbanum, Bromus benekenii, Sanguisorba minor, Melica ciliata, Silene rupestris, Viscaria vulgaris, Plantago lanceolata	Sensitive	NO3-	Falkengren-Grerup, 1995
Oryza sativa subsp. indica	Sensitive	NO3-	Zhao et al., 2013b