How does a seed’s root know which way is down towards the earth to establish its roots and up toward the surface to get sunlight?

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How does a seed’s root know which way is down towards the earth to establish its roots and up toward the surface to get sunlight?

In: Earth Science

Gravity. No matter where the seed is or how deep it’s buried the seed will grow roots down towards gravity and shoots away from it

Which is why it’s a great prank on novice gardeners to tell them to be sure and plant the seeds right side up

Plants have gravity sensing cells.
Which are cells with little grains floating around called statoliths
They sink down to the bottom, and from there the plant treats that part as down and the opposite as up.
They launched some plants into space and watched them grow for science,and the result was a tangled mess.
Nowadays they just put the plants in a centrifuge if they want to grow them in space.

Yo, their roots have senses kinda… they fall to the bottom of whatever space they are in… and grow on the ‘floor’ of that tiny bubble. This continues until:

After a while they switch it up and grow towards water and nutrients.

Plants are sentient to a degree! For example, they decide what nutrients are valuable to them.. they live, grow, communicate and die just like everything on this planet. The circle of life is a beautiful eternal gift from god 🙂