why does roots of a plant bend away from light? I know this is caused by auxin hormone but how does bend of roots away from light help plants?
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The root of the plant bend away from light because of phototrophic movement . Trophic movement is plant movement which is directional movement and is related to growth. When plant shows movememt towards stimulation of light, it is called phototrophic movement or phototropism.
ashutosh6557:
But my question is how does it help plants I mean why don't roots grow straight down to ground rather than bending away from light in activity 7.2
The roots bend away because they shows negative phototropism while stem shows positive phototropism. as the root shows negative phototropism so they bend to the opposite direction the stem bends.
u r not getting it i mean why would the show negative phototropism why don't they just grow straight towards ground instead of bending like that. Everything has a purpose behind it so what is the purpose of showing negative phototropism
Roots usually exhibit negative phototropism, although gravitropism may play a larger role in root behavior and growth. maybe gravitation is a factor.
but if it gravity had some role then why wouldn't it go downsards instead of bending away to left side in activity of 7.2 control and coordination
look , whatever I've got ,I made you understand the best way I could. Now you can ask this question to your teacher for further explanation. thanks...
thanks for helping!
anytime :-)
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The bend of roots away from light help plants in the following way:
● Due to negative photo tropism roots of a plant and away from the light and get penetrated into the soil.
● Such growth of roots into the soil help the plant to absorb water and minerals present in the soil and grow rapidly.
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