0
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
What else can I help you with?
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 dealt with the flowering period of plants. They defined short-day ( late summer and fall, less than about 16 hours ), long-day ( summer, longer than 9 to 16 hours ), day-neutral ( any length ), and intermediate-day ( not classifiable as either long-day or short-day) plants in relation to their photoperiod. One of early publications: Factors Controlling Flowering of the Chrysanthemum: I. THE EFFECTS OF PHOTOPERIOD... SCHWABE J. Exp. Bot..1950
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.
How do higher plants percieve photoperiod?
The higher plants percieve photoperiod by their leaves. The intensity and quality of light determine the duration of photoperiod for inducing flowering.
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.
What is photoperiod in agriculture?
A photoperiod in agriculture is the amount of time each day that a plant spends in daylight.
Does summer have the longest photoperiod or hours of sunlight?
Yes.
What is photo-thermo insensitivity in field crops?
crops which can tolerate high temperature and photoperiod is photo-thermo insensitive crop.
What is the specific term that refers to seasonal changes in the relative lengths of night and day?
photoperiod
What affects the growth of snow peas?
photoperiod, temperature, fertility, spacing, disease, pests
How does the photoperiod differ between the two solstices?
Summer Solstice marks the first day of summer (June 21), thus the longest photoperiod of the year. Winter Solstice marks the first day of winter, and the sun reaches it's lowest position in the sky throughout the whole year, so we expierence the shortest photoperiod of the year.
Describe how Poinsettias are grown for Christmas in relation to their critical photoperiod?
A poinsettia is a Christmas flower.... hope i helped...
What has the author Trygve Kristoffersen written?
Trygve Kristoffersen has written: 'Interactions of photoperiod and temperature' -- subject(s): Tomatoes
What has the author Bonnie Marie Bergsma written?
Bonnie Marie Bergsma has written: 'The effect of low temperature and continuous photoperiod on the growth of the potato (\\'
What has the author Joanne McKinney written?
Joanne McKinney has written: 'The influence of a light/dark photoperiod on the cell cycle of the freshwater diatom Stephanodiscus hantzschii'
