ITQB: FB - PhD Theses
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- Exploring genetic variability of Pinus pinaster in the molecular response pathways to the pinewood nematode as a source of markers for assisted selectionPublication . Barrios Modesto, Inês Sofia; Miguel, Célia; Van de Peer, YvesPine wilt disease (PWD) is caused by the endoparasitic nematode Bursaphelenchus xylophilus, or pinewood nematode (PWN). This disease is a serious environmental problem in Eastern Asia and Southwestern Europe. In Iberian Peninsula, it severely affects maritime pine (Pinus pinaster Ait.) forests. Despite the high susceptibility of P. pinaster to PWD, heritable resistance has been observed in selected half-sib families after PWN inoculation, showing that the implementation of breeding programs for PWD resistance is a viable and valuable strategy for managing this disease.
- Molecular regulation of Pinus pinaster embryo developmentPublication . Santos Rodrigues, Andreia Sofia; Miguel, Célia"In a context of increasing wood demand from the forest industry worldwide, maritime pine (Pinus pinaster) breeding programs have been putting their focus on wood traits, resilience to abiotic stresses and to biotic agents. Ultimately, one of the main goals is to produce large numbers of clonal trees from the ones selected with the improved traits. Currently, the clonal propagation of the genotypes selected in breeding programs is already being applied to several forest tree species for commercial purposes, namely by using a type of vegetative propagation technology called somatic embryogenesis. P. pinaster is not yet among the forest tree species which have been successfully clonally propagated on a large commercial scale by somatic embryogenesis.(...)"
- Molecular regulation of secondary gorwth: searching for SHORT-ROOT function in cork formationPublication . Miguel, Andreia Lúcia; Miguel, CéliaThe analysis of molecular regulators involved in controlling the maintenance and function of plant meristems has been the subject of many studies. Some master regulators of these processes have been identified in Arabidopsis benefiting from the array of tools available for genetic and molecular analysis in this model plant. However, aspects such as secondary growth that are more extensively observed in woody plants, have been less studied. Secondary growth is responsible for the enlargement of the plant stems and roots and results from the activity of the lateral (secondary) meristems, vascular cambium and cork cambium (phellogen), which produce two important renewable natural resources, wood and cork, respectively.(...)
- Novel insights into plant vascular development: disclosing a mechanism to maintain thermospermine homeostasis in the xylemPublication . Milhinhos, Ana Filipa Gonçalves; Miguel, Célia Maria Romba RodriguesWood is one of the most important natural renewable resources. The developmental processes that underlie wood formation follow a well defined sequence of events that start at the core of the vascular cambium - the stem cell niche - that perpetually nourishes cells to the inside of the stem that ultimately become xylem/wood cells. The processes of specification and differentiation of cells into the xylem cell-types are far from being fully understood. It is a known fact that cells fated to become xylem have to commit suicide in order to serve this purpose.(...)