Contribution
Fluorescence of Parmelia saxatilis thalli
Modenesi, Paolo; Debarbieri, Andrea
Nova Hedwigia Band 52 Heft 1-2 (1991), p. 231 - 238
17 références bibliographiques
publié: Feb 27, 1991
DOI: 10.1127/nova.hedwigia/52/1991/231
ArtNo. ESP050005201018, Prix: 29.00 €
Abstract
Two chemical races of Parmelia saxatilis, one containing lobaric acid and other without this accessory substance, have been compared. The presence of lobaric acid results in an intense bluish-white fluorescence localized in the pseudocyphellae, in the isidia and in the edges of the thalli lobes, the rest of the thallus emitting a weak ochreous fluorescence from the upper cortex, common to all samples that do not contain lobaric acid. Scanning electron microscopy shows up a deposit of crystals of lobaric acid in these vegetative structures.
Mots-clefs
lobaric acid • accessory substance • fluorescence • thallus • cortex • deposit • crystal