Genetic and environmental effects of growth and production of secondary compounds in Cladonia cristatella

摘要: Abstract This is the first study under controlled conditions to evaluate genetic and environmental variables acting on whole lichen. Four cloned lines of Cladonia cristatella , derived from single spores re-associated with teh normal algal partner ( Trebouxia erici ), were grown in a phytotron chemically analysed. Growth, as measured by cover, was significantly affected clone consistently decreased at lower temperatures higher light intensities. The two biogenetically distinct pathways leading characteristic secondary products differently factors related component (clone), developmental stage (age) environment (temperature light). Products fo barbatic acid pathway, depsides, detected youngest lichenized hyphae, concentrations did not change age. didymic dibenzofurans, incrasingly abundant progressively older squamules. four clones showed different capacities for production compounds responses studied. pathway increased temperatures; those either changed little or appreciably according clone. Of studied, had least effect chemistry. Between-pathway variation greater than within-pathway variation.