Why do Roots Grow Down and Shoots Grow Up
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| why do plants always grow upwards |
The roots react to gravity and the shoots grow upwards to the sun. The roots anchor the plants while absorbing water and mineral
salts. Like most plants, shoots depend on soil for water and support.
why Roots Grow Down
and Shoots Grow Up
 |
| why roots grew downwards and shoots grow upwards |
Why do Plant Roots Grow Down
Roots:- Roots grow because the root reacts to gravity by releasing chemicals that prevent growth on the lower side, thus turning the root down.
The roots of plants are geotropic positive and
phototropic negative. As a result, they will avoid light and grow to gravity in
the soil. In addition, plant roots grow to find water and minerals.
Why do Plant Shoots Grow Upwards
Shoots:- The shoots grow up towards the sun.
The growing tip of the shoot can detect the direction of light, and chemicals
are released that make it grow further on the lower or darker side, thus
turning the shoot up
If you look at the sprouting process, it is the
coleorhiza or root tip that first emerges from the seed and gravity-based grows
down.
This is how a seed determines which path is
"up" by basically finding which way is "down".
Later, the coleoptile will lengthen and raise
the cotyledons above the ground where they will become green during sun
exposure and begin photosynthesis.
This is crucial because the food stored in
the cotyledons will soon disappear and the plant may starve if there is no sun.
