Revista Brasileira de Fruticultura
Print version ISSN 0100-2945
FLOREZ, Sandra Liliana et al. Growth of lulo (Solanum quitoense Lam.) plants affected by salinity and substrate. Rev. Bras. Frutic. [online]. 2008, vol.30, n.2, pp. 402-408. ISSN 0100-2945. http://dx.doi.org/10.1590/S0100-29452008000200023.
The effects of 0, 30 and 60 mM NaCl and substrates (red peat, sand or 3:1:1 [w/w] mixture of peat, sand, or soil) on vegetative growth of lulo, an Andean fruit species, during 12 weeks were studied. The experiment was carried out by using 2000 cm3 of polypropylene plastic pots under greenhouse conditions. Plant height, number of leaves and nodes, leaf area, total plant dry matter (DM), and shoot/root ratio were evaluated. With the increase of salt concentration, the plant height, the number of leaves and nodes, the leaf areas and plant dry mass DM decreased, whereas shoot/root ratio increased. Sand grown lulo plants were most affected by salinity and presented total mortality at 60 mM NaCl. On the other hand, plants held either in peat or in substrate mixture developed larger height, greater leaf and node numbers, higher leaf area and dry matter content. Shoot/root ratio in control (soil) and sand-grown plants (30 mM NaCl) was lower.
Keywords : Lulo; naranjilla; salinity; NaCl; plant height; leaf area; dry matter; peat; sand.