| Autor: |
Serra O; University of Girona, Department of Biology, Girona, Spain; email: olga.serra@udg.edu., Mähönen AP; Institute of Biotechnology, HiLIFE, University of Helsinki, Helsinki, Finland; email: aripekka.mahonen@helsinki.fi.; Organismal and Evolutionary Biology Research Program, Faculty of Biological and Environmental Sciences, and Viikki Plant Science Centre, University of Helsinki, Helsinki, Finland., Hetherington AJ; Institute of Molecular Plant Sciences, University of Edinburgh, Edinburgh, United Kingdom; email: sandy.hetherington@ed.ac.uk., Ragni L; Center for Plant Molecular Biology (ZMBP), University of Tübingen, Tübingen, Germany; email: laura.ragni@zmbp.uni-tuebingen.de. |
| Abstrakt: |
The periderm acts as armor protecting the plant's inner tissues from biotic and abiotic stress. It forms during the radial thickening of plant organs such as stems and roots and replaces the function of primary protective tissues such as the epidermis and the endodermis. A wound periderm also forms to heal and protect injured tissues. The periderm comprises a meristematic tissue called the phellogen, or cork cambium, and its derivatives: the lignosuberized phellem and the phelloderm. Research on the periderm has mainly focused on the chemical composition of the phellem due to its relevance as a raw material for industrial processes. Today, there is increasing interest in the regulatory network underlying periderm development as a novel breeding trait to improve plant resilience and to sequester CO 2 . Here, we discuss our current understanding of periderm formation, focusing on aspects of periderm evolution, mechanisms of periderm ontogenesis, regulatory networks underlying phellogen initiation and cork differentiation, and future challenges of periderm research. |
