“…When added at low concentrations of 5 to 50 µM (0.845 to 8.45 mg/l), it was found to inhibit somatic embryo formation in Coffea canephora leaf explants (Hatanaka et al, 1995). On the other hand, media supplemented with AgNO 3 has been shown to improve somatic embryogenesis in species such as Triticum durum (Poaceae) (Fernandez et al, 1999), Coffea canephora (Rubiaceae) (Fuentes et al, (2000), Spinacia oleracea (Ishizaki et al, 2000), Carthamus tinctorius (Asteraceae) (Mandal et al, 2001), Paspalum scrobiculatum (Poaceae) (Vikrant, 2002), Bactris gasipaes (Arecaceae) (Steinmacher et al, 2007), Paspalum scrobiculatum (Poaceae) and Eleusine coracana (Poaceae) (Kothari-Chajer et al, 2008), Hedychiurn bousigonianum (Gingeberacea) (Sakhanokho et al, 2009), Gossypium nelsonii (Malvaceae), Gossypium australe (Yan et al, 2010) and Pinus taeda (Pinaceae) (Pullman et al, 2003). Kong and Yeung (1995) reported that 100 µM AgNO 3 (16.9 mg/l AgNO 3 ) stimulated embryo formation in white spruce.…”