Knowra Dioecy Dioecy Dioecy is a reproductive system in which individual plants bear either male or female flowers, not both. It requires pollen to move between separate plants for sexual reproduction.
Sex determination in plants : Biological processes that establish whether a plant develops male, female, or bisexual reproductive structures. Dioecious plants must develop male or female flowers rather than both on one individual.
Flower : The reproductive structure of flowering plants, containing organs that produce gametes or attract pollinators. Dioecy is defined by which plants bear male and female flowers.
Ginkgo : A long-lived tree species, Ginkgo biloba, whose individuals are male or female. Ginkgo is a familiar dioecious tree, with female trees producing fleshy-coated seeds.
Sex ratio : The proportion of males and females in a population. Dioecious populations need both sexes, and unequal sex ratios can affect reproduction.
Sex chromosomes in plants : Chromosomes that carry genetic factors determining sex in some plant species. Some dioecious plants use sex chromosomes, while others rely on different sex-determining systems.
Pollination : The transfer of pollen from an anther to a receptive stigma. Pollen must travel from male plants to female plants for dioecious species to reproduce.
Stamen : The flower organ that produces pollen, typically consisting of an anther and a filament. Male flowers bear stamens that produce pollen for transfer to female plants.
Date palm : A palm species cultivated for its edible fruit, with male and female flowers on separate trees. Date production depends on female palms receiving pollen from male palms.
Colonization (ecology) : The establishment of a species in a new habitat or of individuals in an unoccupied site. A lone colonist of a dioecious species may be unable to reproduce sexually.
Sex determination in Silene latifolia : The genetic system that determines male or female development in the dioecious campion Silene latifolia. This species is a key model for studying plant sex chromosomes and sex-linked genes.
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