Sleep-Wake Studies in Phyllanthus

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Phyllanthus is a plant which can be found in any garden or roadside pavement.
It is around 4-5 cm elongated plant, with branches and compound leaves.

Fascinating thing about this plant is, it closes its leaves in the evening and opens it up again in the morning time.

Can you collect this plant from your immediate environment and grow it at your school/home?

Can we check at what time they are opening and closing its leaves?
Can you think factors which could be causing this opening & losing of leaves in Phyllanthus?
Please enlist them in the reply section below.

[center]Opening of leaves in Phyllanthus[/center]
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[center]Closing of leaves in Phyllanthus[/center]

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Please give some ideas in the reply section below about,
how to experimentally prove the factors which are causing this opening & closing of leaves?

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Phyllanthus leaf
movement is induced by volume changes in motor cells in
the pulvinus, a joint-like thickening located at the base of
the petiole. Motor cells play a key role in leaf movement.
A flux of potassium ions across the plasma membrane of
the motor cells is followed by massive water flux, which
results in swelling or shrinking of these cells. Certain bioactive compounds are also responsible for sleep and wake cycle but they vary from species to species

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Can we have the reference for this?
Looks interesting!
Motor cells in Plants!