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प्रश्न
Describe physiological effects and applications of gaseous hormones in plants.
Describe physiological effects and applications of ethylene.
उत्तर
Ethylene is the gaseous hormone. Its applications and physiological effects are as follows:
- It promotes the ripening of fruits like bananas, apples and mangoes.
- It stimulates the initiation of lateral roots in plants and breaks the dormancy of bud and seed.
- It accelerates the abscission activity in leaves, flowers and fruits by forming of abscission layer.
- Ethylene inhibits the growth of lateral buds and causes apical dominance and retards flowering.
- It is associated with the enhancement of the process of senescence of plant organs.
- It inhibits flowering in most plants except pineapple.
- It causes epinasty (drooping) of leaves and flowers.
- It increases the activity of chlorophyllase enzyme causing degreening effect in banana and Citrus fruits.
संबंधित प्रश्न
The figure given below shows the stages of ripening in a banana. Answer the questions that follow:
- Name the plant hormone responsible for the above changes.
- Mention two characteristic features of this hormone.
Name the gaseous plant hormone. Describe its three different actions in plants.
What would be expected to happen if A rotten fruit gets mixed with unripe fruits?
Compound which is most widely used as a source of ethylene is ____________.
Synthesis of ethylene takes place in ______
In which of the following cases ethylene (gaseous phytohormone) synthesized in large amounts by tissues?
- Ripening of fruits
- Senescence
- Cell division promoting activity
- Actively growing apices of stems and roots.
Which phytohormones is called secondary hormone?
Which hormone is responsible for fruit ripening?
Give a definition of the following Apical dominance.
Name the following:
A gaseous plant hormone which promotes the ripening of fruits.
