Photoperiod

photoperiodThe duration of an organism's daily exposure to light. photoperiodicDescribes growth affected by exposure to light.

Photoperiod - the relationship between the length of light and dark in a 24-hour period. Photosynthesis - the building of chemical compounds (carbohydrates) from light energy, water and CO2.

Photoperiodism - responses of plants to the relative lengths of light and dark cycles. Photosynthesis - the production of sugar from carbon dioxide and water in the presence of chlorophyll, activated by light energy and releasing oxygen.

Photoperiodism - Physiological response due to length of light exposure. Photophosphorylation - Generation of ATP via photosynthesis. Photorespiration - Metabolic pathway that uses oxygen and produces CO2.

photoperiodism n. The initiation of flowering based on the relative amounts of darkness and light in a 24-hour period.

Photoperiodism- The physiological response of an organism to the periodicity and duration of light and darkness which affects many processes including growth, flowering, and germination.

PHOTOPERIODISM - The response of plants to the length of a day and night (i.e. poinsettias, cactus, night blooming flowers) PINCH OUT - Pinching with the fingers to remove the tip of a growing shoot to encourage lateral growth.

Poinsettias are photoperiodic and respond to lengthening nights. To be in full color by Christmas, they must receive 14 hours absolute darkness each night from October 1 onward. To encourage rebloom, cut back plant to 6?

The environmental factors triggering winter egg production are diminishing food supply, temperature and photoperiod. The bulk of winter egg deposition occurs from mid to late August, but may continue until late September.

Mums are photoperiodic, meaning they bloom in response to shorter days and longer nights. Bloom color varies from yellow, white, pink, red and orange. Blooms from late summer to fall, depending on species.

The poinsettia is a photoperiod plant, which means it begins to set buds and produce flowers as the winter nights become longer.

The secret of good bloom seems to be one of temperature and photoperiod control. They will develop buds and bloom if given bright light, short days, and night temperatures between 55 and 65 degrees Fahrenheit.

Definition as written by paulgrow: A plant in which flower formation is not controlled by photoperiod or day length Definition as written by Magpye: A plant whose blooming period is not affected by the length of day.

Plant chrysanthemums in full sun. Do not plant mums near street or night lights as the artificial lighting will disturb their photoperiod cycle. Do not overcrowd chrysanthemums -- good air circulation helps prevent disease.

Both coolers easily fit under one of our 250-watt metal halide Hydrofarm Sunburst lights, which is connected to a timer set for a 12-hour photoperiod.

See also: Plant, Flower, Water, Bloom, Spring