Thigmonasty is caused by a change in the turgor pressure within Mimosa pudica leaves. Turgor pressure is defined as the force against the cell walls of the plant that is created by the water within the cell contents. This pressure is responsible for keeping the leaves standing up under normal conditions. When this plant is touched, the mechanosensory response begins by activating the contractile proteins in the base of the leaf. These proteins allow the water within the cell to slowly diffuse out which decreases the turgor pressure in the plant and therefore causes the leaves to collapse. Once one single leaf is touched, the adjacent leaves on the branch get stimulated by the motion of the first leaf and close as well. With the lack or excess of water in heat within the 4 environments, the turgor pressure in these leaves may be altered. Through understanding how thigmonasty takes place in Mimosa pudica plants, one can infer how changes in the surrounding environment might affect the plant's nastics movements.
Comments
Context
The sentence "With the lack or excess of water in heat within the 4 environments, the turgor pressure in these leaves may be altered." makes a reference to environments without further explaining more about them in the paragraph.
In "These proteins allow the
In "These proteins allow the water within the cell to slowly diffuse out which decreases the turgor pressure in the plant and therefore causes the leaves to collapse. " I think there should be a comma between out and which. I do not think there needs to be an apostrophe in "plant's" in the last sentence.
Possible word change
Maybe change "standing up" to upright just to prevent sounding casual. Overall good writing though.