What is etiolation botany?
LIGHT. Lack of sufficient light retards chlorophyll formation and promotes slender growth with long internodes, thus leading to pale green leaves, spindly growth, and premature drop of leaves and flowers. This condition is known as etiolation.
What is the definition of etiolation?
1 : to bleach and alter the natural development of (a green plant) by excluding sunlight. 2a : to make pale. b : to deprive of natural vigor : make feeble.
What is etiolation and when does it occur?
Etiolation in plants is a natural phenomenon and is simply a plant’s way of reaching for a light source. If you have ever started seeds without sufficient lighting, then you have seen how the seedlings grow rather spindly with a long, abnormally thin, pale stem. This is an example of etiolation in plants.
What is etiolation and chlorosis?
Chlorosis is a physiological disease, characterised by yellowing of leaves due to shortage of mineral elements like magnesium or iron, while etiolation is a physiological enomenon shown by green plants when kept in dark. Such plants show elongation of stem with primary leaves unexpanded and yellow in colour.
What is the meaning of Heterophylly?
heterophylly (uncountable) (botany) Marked changes in leaf morphology induced by environmental conditions; the ability to display such changes. (botany) Significant variation in leaf shape on a same plant.
How do etiolated plants grow?
It’s important to remember that etiolation is a normal biological reaction of plants to help them reach sunlight. Under normal circumstances, a seed will germinate and naturally de-etiolate upon breaking through the ground. However, it may become necessary to assist plants that are suffering from etiolation.
Why is etiolation important?
Etiolation increases the likelihood that a plant will reach a light source, often from under the soil, leaf litter, or shade from competing plants. The growing tips are strongly attracted to light and will elongate towards it.
What is an etiolated cactus?
Etiolation is common in cacti and succulent plants. Etiolated cacti are plants that lose their natural color and become thin. They grow tall and lose their natural shape. Cacti with etiolation are more susceptible to diseases such as root rot or stem rot.
What causes etiolation in cactus?
Etiolation is when cacti are not getting enough light, and their stems curl up. Etiolated cacti often grow tall, as if trying to stretch towards the light. This is a condition that causes the cactus to become thin and pale.
Is etiolation a phototropism?
Even though phototropism is a phenotypic adaptation seen in multiple organs and stages of plant development, much of our understanding is based on studies using dark-grown (etiolated) seedlings. In this issue of Plant Physiology, Sullivan et al. (2019) show that phototropism is much stronger in de-etiolated seedlings.
What is Heterophylly give example?
Heterophylly is defined as the presence of leaves that have different shapes on the same plant. For example, buttercups display heterophylly.
Which one is the example of Heterophylly?
Some examples are coriander and cotton plants, and also seen in aquatic plants also. So from the all above explanation, it is plasticity which is the correct option.
What is the meaning of etiolation?
Etiolation /iːtiəˈleɪʃən/ is a process in flowering plants grown in partial or complete absence of light.
What is the effect of etiolation on plants?
Etiolation increases the likelihood that a plant will reach a light source, often from under the soil, leaf litter, or shade from competing plants. The growing tips are strongly attracted to light and will elongate towards it. The pale color results from a lack of chlorophyll . chlorosis, a pale yellowish-white coloration.
What is de-etiolation in plants?
De-etiolation. De-etiolation, is a series of physiological and biochemical changes a plant shoot undergoes when emerging from the ground or in response to light after a period of insufficient light exposure. This process is known informally as greening.
What is Dede-etiolation?
De-etiolation is the transition of seedlings from below-ground growth to above-ground growth form. Elongation is controlled by the plant hormones called auxins, which are produced by the growing tip to maintain apical dominance. Auxin diffuses, and is transported, downwards from the tip, with effects including suppressing growth of lateral buds.