The advantage of field grown plants as bioindicators of a polluted env
ironment is demonstrated through analyses of microspores. Forty-one sp
ecies of the native Slovakian flora were used to test the hypothesis t
hat local flora can serve as bioindicators of genotoxicity of industri
ally polluted areas. A higher frequency of aberrant microspores from p
lants in the polluted areas supported the hypothesis.