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Photoperiodism is a response that certain plants have to decreases or increases in the amount they receive in a day (which is normally produced by seasonal movement of the sun - longer and shorter days).
Some plants require short days to initiate flower formation, while others long day length initiates flowering.
This process can be artificially created in greenhouses using curtains and artificial light to "trick" certain plants like chrysanthemums and poinsettia to flower outside of their natural flowering period.
Photoperiodism is controlled at a cellular level by photoreceptor proteins in the cells of the plants.
Phototropism is a the mechanism whereby plants grow towards the light (like a houseplant growing towards the window), or in the case of certain flowers like sunflower the way in which the "flower" tracks the path of the sun
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ProfessorPhotoperiod refers to the number of hours of light a plant receives in a 24-hour period. It is an important environmental factor that influences the growth, development, and flowering of plants. Plants can be classified as short-day, long-day, or day-neutral based on their response to the length of daylight.
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What do you by photoperiod and name two process that are dependent on photoperiod?
Photoperiod refers to the duration of light and darkness an organism is exposed to in a 24-hour period. Seasonal breeding and dormancy (such as hibernation in animals or winter dormancy in plants) are two processes that are dependent on photoperiod.
Even if all of the other conditions are right a plant will not flower or produce fruit without the correct photoperiod?
Correct, the photoperiod (the amount of light and darkness a plant receives each day) is a crucial environmental factor that can signal to the plant when to flower or produce fruit. Different plants have specific requirements for the length of light and dark periods they need to initiate flowering or fruiting.
The rate of division of most vertebrate cells is least likely to be influenced by what?
The rate of division of most vertebrate cells is least likely to be influenced by environmental temperature. This is because vertebrate cells can maintain a relatively stable internal environment regardless of external temperature fluctuations.
What did early experiments on photoperiodism demonstrate?
Early experiments on photoperiodism demonstrated that plants and animals have biological processes influenced by the length of day and night. These experiments showed that certain species of plants flowered or went into dormancy based on the amount of light they received. This led to the discovery of photoreceptors that help organisms sense changes in day length and regulate their growth and development accordingly.
What is the pigment responsible for photoperiodism?
Action spectra and photoreversibility experiments show that phytochrome is the pigment that receives the red light. Red light is the most effective color in interrupting the night-time portion of the photoperiod.
