what type of tropism is the growth of pollen tube towards endosperm
Answers
Answer:
This is chemo-tropism .
Explanation:
There are different types of movements that are seen in plants .
The movements are of two types :
- Tropic movements
- Nastic movements
Tropic movements : They are those movements that in response to the stimulus .This can be in direction of stimulus or can be in direction opposite to stimulus .
The stimulus can be :
- Light
- Water
- Gravity
- Chemical etc
Accordingly the movement is assigned a special name as phototropism ,chemo-tropism ,hydro-tropism etc
We know ,that pollen falls on stigma absorbs nutrition and starts forming pollen tube .This pollen tube enters the embryo sac through micropyle .This is in response to a chemical secretion. That is the reason it is a kind of chemo-tropism .
The growth of pollen tube towards endosperm shows chemo tropism.
Explanation:
When plant parts are stimulated by chemical and movement takes place with in the plant is called as chemo tropism.
Ex- Movement of pollen tube towards endo spore by getting chemical stimuli.
This is also called as positive chemo tropism.