Overview of Haploidy -- Pathways to Microspore Embryogenesis -- The Role of Stress in the Induction of Haploid Microspore Embryogenesis -- Microspore Embryo Induction and Development in Higher Plants: Cytological and Ultrastructural Aspects -- Biochemical and Molecular Aspects of Haploid Embryogenesis -- Storage Product Metabolism in Microspore-Derived Cultures of Brassicaceae -- Chromosome Dou…