干旱区生态环境知识资源中心

The early development of Hypogymnia physodes from soredia to the formation of stratified lobes has been studied experimentally in the vicinity of a copper-smelting plant in the Middle Urals. SEM investigations combined with life tabled analyses of early developmental stages revealed decreases in soredial survival and developmental rate in polluted localities. Non-stratified pre-thallus stages without an epicortex were tolerant to toxic impact and were able to survive even in the zone with the highest pollution (lichen desert zone). The sensitivity of developmental stages increased after stratified lobes had developed. (C) 2001 The British Lichen Society.