Absorption capacity of lead by different lichenic species

Abstract

The use of bioindicator is very important for assessing the pollution intensity by accumulation of pollutants and lead in particular. The measurement of this accumulation in some organisms such as lichens and its effects on the physiological and morphological characteristics was found very effective to answer this problem. It is in this context that we have oriented our research whose objective is to determine the accumulating power of some lichenic species namely: Flavoparmelia sordians, Ramalina farinacea and Xanthoria parietina under the influence of three concentrations of lead nitrate: low, medium and high, respectively (0.207 gPb/l, 2.07 gPb/l and 20.7 gPb/l) in other parts highlight the impact of this accumulation on the Physiology (determination of chlorophyll) and morphology (morphological observation) of these species. The comparison between the three