Samsonova Е. А. RussiaSaratovSaratov State University, 410012, Saratov, Astrakhanskaya, 83 v.v.korobko@mail.ru Author's articles Biotesting polysubstituted perchlorates halkogen(thio)pyrilium Effect of perchlorates halkogen(thio)pyrilium on morphogenesis and pigment composition of the first leaves of wheat seedlings Effect of N, O, S-contaning heterocyclic compounds on morphogenesis and pigment composition of the first leaves of wheat seedlings