[Complex evaluation of the cytogenetic activity of plant growth regulators in different test systems].

The cytogenetic activity of plant growth regulators is investigated in three different test systems. It is shown that three substances (hydrel, dihydrel, camposan) induce no chromosome breaks. MAH-I (maleic acid hydrazide monosodium salt) increases the mutagenic activity in all three investigated test-systems (in somatic and generative cells of rats and in the culture of human lymphocytes). The recrystallized MAH (II) and alar demonstrate an increase in the level of chromosome aberrations in the culture of human lymphocytes and in the bone marrow of rats.