4 documents found, page 1 of 1
Tropical Trees as Time Capsules of Anthropogenic Activity
Caetano Andrade, Victor L.; Clement, Charles Roland; Weigel, Detlef; Trumbore, Susan Elizabeth; Boivin, Nicole L.; Schöngart, Jochen; Roberts, PatrickAfter the ice caps, tropical forests are globally the most threatened terrestrial environments. Modern trees are not just witnesses to growing contemporary threats but also legacies of past human activity. Here, we review the use of dendrochronology, radiocarbon analysis, stable isotope analysis, and DNA analysis to examine ancient tree management. These methods exploit the fact that living trees record informa...
Hyperosmotic stress memory in Arabidopsis is mediated by distinct epigeneticall...
Wibowo, Anjar; Becker, Claude; Marconi, Gianpiero; Durr, Julius; Price, Jonathan; Hagmann, Jorg; Papareddy, Ranjith; Putra, Hadi; Kageyama, JorgeInducible epigenetic changes in eukaryotes are believed to enable rapid adaptation to environmental fluctuations. We have found distinct regions of the Arabidopsis genome that are susceptible to DNA (de)methylation in response to hyperosmotic stress. The stress-induced epigenetic changes are associated with conditionally heritable adaptive phenotypic stress responses. However, these stress responses are primari...
Dissection of miRNA Pathways Using Arabidopsis Mesophyll Protoplasts
Martinho, Cláudia; Confraria, Ana; Elias, Carlos Alexandre; Crozet, Pierre; Rubio-Somoza, Ignacio; Weigel, Detlef; Baena-González, ElenaMicroRNAs (miRNAs) control gene expression mostly post-transcriptionally by guiding transcript cleavage and/or translational repression of complementary mRNA targets, thereby regulating developmental processes and stress responses. Despite the remarkable expansion of the field, the mechanisms underlying miRNA activity are not fully understood. In this article, we describe a transient expression system in Arabid...
Temporal Control of Leaf Complexity by miRNA-Regulated Licensing of Protein Com...
Rubio-Somoza, Ignacio; Zhou, Chuan-Miao; Confraria, Ana; Martinho, Claudia; von Born, Patrick; Baena-Gonzalez, Elena; Wang, Jia-Wei; Weigel, DetlefThe tremendous diversity of leaf shapes has caught the attention of naturalists for centuries. In addition to interspecific and intraspecific differences, leaf morphologies may differ in single plants according to age, a phenomenon known as heteroblasty. In Arabidopsis thaliana, the progression from the juvenile to the adult phase is characterized by increased leaf serration. A similar trend is seen in species ...