title: The molecular and physiological responses of Physcomitrella patens to ultraviolet-B radiation.
abstract: Ultraviolet-B (UV-B) radiation present in sunlight is an important trigger of photomorphogenic acclimation and stress responses in sessile land plants. Although numerous moss species grow in unshaded habitats, our understanding of their UV-B responses is very limited. The genome of the model moss Physcomitrella patens, which grows in sun-exposed open areas, encodes signaling and metabolic components that are implicated in the UV-B response in flowering plants. In this study, we describe the response of P. patens to UV-B radiation at the morphological and molecular levels. We find that P. patens is more capable of surviving UV-B stress than Arabidopsis (Arabidopsis thaliana) and describe the differential expression of approximately 400 moss genes in response to UV-B radiation. A comparative analysis of the UV-B response in P. patens and Arabidopsis reveals both distinct and conserved pathways.
authors.affiliation: Institute of Biology II , Faculty of Biology, University of Freiburg, D-79104 Freiburg, Germany.
authors.forename: Luise
authors.initials: L
authors.lastname: Wolf
authors.forename: Luca
authors.initials: L
authors.lastname: Rizzini
authors.forename: Ralf
authors.initials: R
authors.lastname: Stracke
authors.forename: Roman
authors.initials: R
authors.lastname: Ulm
authors.forename: Stefan A
authors.initials: SA
authors.lastname: Rensing
mesh_terms: D000222:Adaptation, Physiological / Q000528:radiation effects; D000872:Anthocyanins / Q000096:biosynthesis; D017360:Arabidopsis / Q000254:growth & development / Q000528:radiation effects; D001499:Bayes Theorem; D019068:Bryopsida / Q000235:genetics* / Q000254:growth & development / Q000502:physiology* / Q000528:radiation effects; D044948:Flavonols / Q000096:biosynthesis; D018506:Gene Expression Regulation, Plant / Q000528:radiation effects; D017343:Genes, Plant / Q000235:genetics; D005838:Genotype; D055993:Germ Cells, Plant / Q000254:growth & development / Q000528:radiation effects; D008957:Models, Genetic; D009024:Morphogenesis / Q000528:radiation effects; D010802:Phylogeny; D015203:Reproducibility of Results; D013170:Spores / Q000254:growth & development / Q000528:radiation effects; D013312:Stress, Physiological / Q000528:radiation effects; D014466:Ultraviolet Rays
chemical_list: D000872:Anthocyanins; D044948:Flavonols