UNIVERSIDAD COMPLUTENSE DE MADRID FACULTAD DE CIENCIAS BIOLÓGICAS Departamento de Genética TESIS DOCTORAL Key factors involved in stress-induced microspore embryogenesis in barley and rapeseed: DNA methylation, arabinogalactan proteins and auxin MEMORIA PARA OPTAR AL GRADO DE DOCTOR PRESENTADA POR Ahmed Abdalla Eltantawy Directoras Pilar S. Testillano M.C. Risueño Almeida Madrid, 2016 © Ahmed Abdalla Eltantawy, 2016