Search results
Results from the WOW.Com Content Network
Heliotropism, a form of tropism, is the diurnal or seasonal motion of plant parts (flowers or leaves) in response to the direction of the Sun. The habit of some plants to move in the direction of the Sun, a form of tropism, was already known by the Ancient Greeks. They named one of those plants after that property Heliotropium, meaning "sun turn".
Evening primrose in the genus Oenothera are a common example of flowers that undergo color changes due to senescence. Oenothera will bloom in the evening and appear to be white or yellow, and by morning they fade to pink or orange. [10] Floral color change can also be a result of an increase or decrease in pH.
These are carotenoids and they provide colorations of yellow, brown, orange, and the many hues in between. The carotenoids occur, along with the chlorophyll pigments, in tiny structures called plastids, within the cells of leaves. Sometimes, they are in such abundance in the leaf that they give a plant a yellow-green color, even during the summer.
The orange color is often added artificially—light yellow-orange is the natural color created by the actual chromoplasts. [7] Valencia oranges Citris sinensis L are a cultivated orange grown extensively in the state of Florida. In the winter, Valencia oranges reach their optimum orange-rind color while reverting to a green color in the spring ...
A typical "portable" dehumidifier can be moved about on built-in casters. A dehumidifier is an air conditioning device which reduces and maintains the level of humidity in the air. [1] This is done usually for health or thermal comfort reasons or to eliminate musty odor and to prevent the growth of mildew by extracting water from the air. It ...
Plant perception is the ability of plants to sense and respond to the environment by adjusting their morphology and physiology. [1] Botanical research has revealed that plants are capable of reacting to a broad range of stimuli, including chemicals, gravity, light, moisture, infections, temperature, oxygen and carbon dioxide concentrations, parasite infestation, disease, physical disruption ...
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
In many flowers the cells have chromoplasts with caroteneid pigments (red, orange, yellow). The most important pigments are the flavonoids , mainly anthocyanins , which are dissolved in the cytoplasm of the cell; the basic pigments are pelargonidin (red), cyanidin (violet), and delphinidin (blue), flavonols (yellow to ivory).