... via the phytochrome system as in P sylvestris (Toole, 1973) and P nigra(Orlandini and Malcoste, 1972). P hale-pensis and P pinaster, two common Iberianpines, have been ... 1972;Toole, 1973; Orlandini and Bulard, 1975).This clearly indicates the photophilousnature of these two pines, which allows forthe germination of their seeds mainly in open ... and ash on seed germination of two Iberian pines(Pinus nigra ssp salzmannii and P sylvestris var iberica) has been studied. These two pines arewidely distributed in...