Anthesis
/ænˈθiːsɪs/
Definition
Anthesis refers to the stage in a flower’s development when it is fully open and functionally mature, especially for pollination. It marks the period when the stamens release pollen and the stigma is able to receive it, though timing varies by species. In horticulture and botany, the term describes a specific flowering phase rather than the entire blooming season or the opening of flower buds in general.
Biological Role
- Pollination timing: In many species, pollination is most likely during anthesis because anthers release pollen and the stigma becomes receptive within that window. The exact sequence can reduce self-fertilization or support it, depending on the plant.
- Environmental control: Light, temperature, and humidity often influence when flowers reach anthesis. Some blooms open in daylight, while others open at night, matching the activity of their main pollinators.
- Clue for plant identification: Botanists often note features visible at anthesis, such as flower posture, color, scent, and the position of stamens and stigma. These details can help separate similar species or describe cultivars accurately.
- Useful in seed production: For growers and breeders, watching for anthesis helps with hand pollination and controlled crosses. It also helps explain poor fruit or seed set when flowers open before pollinators are active or during unfavorable weather.
Related Terms
Flower
Flower is the reproductive structure of a flowering plant, usually containing stamens, which produce pollen, and one or…
Stamen
Stamen refers to the male reproductive structure of a flower. It usually consists of a filament, the stalk, and an…
Pollen
Pollen is a fine, powdery substance made in the anthers of seed plants. It consists of tiny grains that carry the male…
Pollination
Pollination is the transfer of pollen from the male part of a flower, the anther, to the female part, the stigma, of…
Fertilization
Fertilization in plants refers to the biological process in which a male gamete from pollen fuses with a female gamete…
Inflorescence
Inflorescence refers to the arrangement of flowers on a plant, or the complete flowering structure that bears a cluster…
Blossom end rot
Blossom end rot is a physiological disorder, not a disease, that affects developing fruits, especially tomato, pepper…
Anther
Anther is the pollen-producing part of a flower’s stamen, the male reproductive structure. It usually sits at the tip…