Germinação e crescimento de plântulas de Hydrocotyle bonariensis Lam. (Apiaceae) em diferentes concentrações de NACL

摘要: Hydrocotyle bonariensis seeds were germinated at five constant concentrations of NaCl (zero, 15, 30, 60 and 120 mM NaCl) three recovery conditions from salt exposure (seed soaked in 600 seawater) for 30 45 days afterwards transferred to distilled water. Additionally, survival growth seedlings tested six salinity regimes 5, 10, 20, 40 80 NaCl). Germination tests indicate that H. germinate better freshwater, decreased gradually with the increase concentration. was completely inhibited NaCl. Seedling biomass, number leaves leaf size progressively reduced The decrease viability after high exposure, low germination concentration are probably determinant causes restrict distribution stable no-salt areas coastal dunes.