MYCORRHIZA FORMATION IN <i>PLANTAGO MEDIA</i> L. DURING ONTOGENESIS ON DIFFERENT SUBSTRATES
In this paper we present the results of a study of some features of mycorrhiza formation in Plantago media L. cenopopulation at different industrial dumps and in natural habitats. It is shown that some changes occur in mycorrhiza formation during ontogeny, and that this process is influenced by edaphic and climatic factors.