shoot to bend toward a light source.

timer Asked: Aug 7th, 2016

Question description

Order the steps that cause a shoot to bend toward a light source.

Starting with light shines on one side of a shoot and ending bends towards light source.


Photoreceptors in the shoot sense the location of the light

The concentration of auxin increases on the shaded side of the plant.

Cells on the shaded side of the shoot elongate

Auxin activates proton pumps, decreasing the pH of cells on the shaded side of the shoot.

Acidification breaks hydrogen bonds in the cell wall and activates expansins.

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