Organic pollutants effects on lichens have not been addressed. Rehydration is critical for lichens, a burst of free radicals involving NO occurs. Repeated dehydrations with organic pollutants could increase oxidative damage. Our aim is to learn the effects of cumene hydroperoxide (CP) during lichen rehydration using Ramalina farinacea (L.) Ach., its photobiont Trebouxia spp. and Asterochloris e...

I examined the relationships among snow cover (api), l ichen abundance, and canopy composition on the range o f the Aikens Lake population o f woodland caribou (Rangifer tarandus caribou) i n southeastern Mani toba. Percent cover o f forage lichens (Cladina spp.) was positively correlated w i t h max imum total thickness and w i t h max imum vertical hardness o f api. M i x e d communities o f ...

In an earlier paper (1) accumulation of radioactive fall-out by plants in the English Lalte District was related to the mineral content of the various species, with both mosses and angiosperms low in mineral ash showing nluch more radioactivity than plants of high mineral content in the same groups. The present study compares radioactivity of ash from lichens, mosses, and angiosperms, using som...

Ediacara fossils are central to our understanding of animal evolution on the eve of the Cambrian explosion, because some of them likely represent stem-group marine animals. However, some of the iconic Ediacara fossils have also been interpreted as terrestrial lichens or microbial colonies. Our ability to test these hypotheses is limited by a taphonomic bias that most Ediacara fossils are preser...

The extreme resiliency of lichens to UV radiations makes them an interesting model to find new photoprotective agents acting as UV-blockers and antioxidant. In this research, using a new in vitro method designed to overcome the shortage of material associated to many studies dealing with natural products, we show that the three major compounds isolated from the lichen Vulpicida pinastri, vulpin...

objective(s):   the ongoing increasing antibiotic resistance is one of the biggest challenges faced by global public health. the perennial need for new antimicrobials against a background of increasing antibiotic resistance in pathogenic and opportunistic microorganisms obliges the scientific community to constantly develop new drugs and antimicrobial agents. lichens are known prolific sources ...