Влияние 10^(-5)-10^(-19) М водных растворов силатранов и крезацина на прорастание семян пшеницы

The effect of 10-5 - 10-19 М aqueous solutions of 1-methylsilatrane (МS), 1-chloromethylsilatrane (CМS), 1-ethoxysilatrane (ES) and crezacin on the germination of wheat seeds has been studied. Under the action of MS, CMS and ES solutions the seeds germination alternatively increases 2-26%. The most effective were the following concentrations of the solutions: МS 0,6⋅10-6, 10-9, CМS 10-9, ES 10-15 (!) and crezacin 10-7 and 10-17 М (!). But even the treatment of seeds with 10-19 М solutions of МS, CМS, ES and crezacin resulted in higher seeds germination than in the control group. Thus, the data obtained have proved the efficiency of nanomolar (ultralow) dosages of the growth-regulating compounds and as well as alternative dependence of their activity on concentration.