The gametophyte represents the sexual phase in the alternation of generations in plants; the
other, nonsexual phase is the sporophyte. Here, we review the evolutionary origins of the …

The first haploid angiosperm, a dwarf form of cotton with half the normal chromosome
complement, was discovered in 1920, and in the ninety years since then such plants have …

In the plant kingdom, events of whole genome duplication or polyploidization are generally
believed to occur via alterations of the sexual reproduction process. Thereby, diploid pollen …

The flowering plant germline is produced during the haploid gametophytic stage. Defining
the germline is complicated by the extreme reduction of the male and female gametophytes …

The RB1 gene is the first tumor suppressor gene identified whose mutational inactivation is
the cause of a human cancer, the pediatric cancer retinoblastoma. The 25 years of research …

The haploid male gametophyte, the pollen grain, is a terminally differentiated structure
whose function ends at fertilization. Plant breeding and propagation widely use haploid …

During angiosperm male gametophyte development, the male germline is segregated by an
asymmetric cell division of the haploid microspore. This review encompasses recent …

Post‐embryonic growth in plants depends on the continuous supply of undifferentiated cells
within meristems. Proliferating cells maintain their competence for division by active …

Stem cells play a critical role during embryonic development and in the maintenance of
homeostasis in adult individuals. A better understanding of stem cell biology, including …

Fertilization of flowering plants requires the organization of complex tasks, many of which
become integrated by the female gametophyte (FG). The FG is a few-celled haploid structure …