Ajay Kumar Gautam Department of Botany, Abhilashi Institute of Life Sciences,Mandi-175008 (H.P.) India.Email: a2gautam2006@gmail.com Lichen, a unique symbiotic association between an alga and a fungus, where algal component is called phycobiont or photobiont while fungus as mycobiont. These are the composite organisms which have an ability to colonize on a variety of substrates including rock, soil,…