Mimosa Pudica : experiment of light stimulation of plant movements

The Mimosa Pudica is an interesting and unique plant which is often found all around Singapore. It has been known for its ability to close up upon being stimulated. The purpose of this study is to determine the reactions of the Mimosa Pudica under light stimulation. Lights from different parts of th...

Full description

Saved in:
Bibliographic Details
Main Author: Cheong, Collin ZhiWei
Other Authors: Li Hua
Format: Final Year Project
Language:English
Published: 2018
Subjects:
Online Access:http://hdl.handle.net/10356/75125
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Nanyang Technological University
Language: English
id sg-ntu-dr.10356-75125
record_format dspace
spelling sg-ntu-dr.10356-751252023-03-04T19:02:10Z Mimosa Pudica : experiment of light stimulation of plant movements Cheong, Collin ZhiWei Li Hua School of Mechanical and Aerospace Engineering DRNTU::Engineering The Mimosa Pudica is an interesting and unique plant which is often found all around Singapore. It has been known for its ability to close up upon being stimulated. The purpose of this study is to determine the reactions of the Mimosa Pudica under light stimulation. Lights from different parts of the visible light spectrum were used in conducting this experiment to observe the relationship between the intensity of light and the wavelength of light with respect to the fatigue time and closing time of the Mimosa Pudica. Plants were placed in a cardboard box and the leaves were allowed to naturally close up to expand their energy from photosynthesis. A single light source is provided through a hole on the top of the box. The leaves were allowed to naturally open up under the exposure to the light source. The plants were monitored through a phone placed on the other hole on the box. Once the leaves were fully opened, the time taken was recorded using an online multi stopwatch website. The plants were then mechanically stimulated, prompting them to close up and the process was repeated until transition to the fatigue phase was reached. After which the experiment was repeated using different coloured light and intensity. The results showed that the Mimosa Pudica is reactive to both blue and white light while being unreactive to green, red and yellow light. Initial data showed that the fatigue transition cycle for white light was longer as compared to blue light. Further analysis on blue light stimulation at high intensity revealed that the fatigue transitioning phase ranged from the 2nd cycle to the 5th cycle. Plants also demonstrated positive response to UV light stimulation, with the response being similar to blue light stimulation. The author recommends the use of a more precise measuring instrument such as red light interferometer to improve the accuracy of the experiment. Effects of different types of UV light can also be studied. Bachelor of Engineering (Mechanical Engineering) 2018-05-28T06:53:31Z 2018-05-28T06:53:31Z 2018 Final Year Project (FYP) http://hdl.handle.net/10356/75125 en Nanyang Technological University 76 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering
spellingShingle DRNTU::Engineering
Cheong, Collin ZhiWei
Mimosa Pudica : experiment of light stimulation of plant movements
description The Mimosa Pudica is an interesting and unique plant which is often found all around Singapore. It has been known for its ability to close up upon being stimulated. The purpose of this study is to determine the reactions of the Mimosa Pudica under light stimulation. Lights from different parts of the visible light spectrum were used in conducting this experiment to observe the relationship between the intensity of light and the wavelength of light with respect to the fatigue time and closing time of the Mimosa Pudica. Plants were placed in a cardboard box and the leaves were allowed to naturally close up to expand their energy from photosynthesis. A single light source is provided through a hole on the top of the box. The leaves were allowed to naturally open up under the exposure to the light source. The plants were monitored through a phone placed on the other hole on the box. Once the leaves were fully opened, the time taken was recorded using an online multi stopwatch website. The plants were then mechanically stimulated, prompting them to close up and the process was repeated until transition to the fatigue phase was reached. After which the experiment was repeated using different coloured light and intensity. The results showed that the Mimosa Pudica is reactive to both blue and white light while being unreactive to green, red and yellow light. Initial data showed that the fatigue transition cycle for white light was longer as compared to blue light. Further analysis on blue light stimulation at high intensity revealed that the fatigue transitioning phase ranged from the 2nd cycle to the 5th cycle. Plants also demonstrated positive response to UV light stimulation, with the response being similar to blue light stimulation. The author recommends the use of a more precise measuring instrument such as red light interferometer to improve the accuracy of the experiment. Effects of different types of UV light can also be studied.
author2 Li Hua
author_facet Li Hua
Cheong, Collin ZhiWei
format Final Year Project
author Cheong, Collin ZhiWei
author_sort Cheong, Collin ZhiWei
title Mimosa Pudica : experiment of light stimulation of plant movements
title_short Mimosa Pudica : experiment of light stimulation of plant movements
title_full Mimosa Pudica : experiment of light stimulation of plant movements
title_fullStr Mimosa Pudica : experiment of light stimulation of plant movements
title_full_unstemmed Mimosa Pudica : experiment of light stimulation of plant movements
title_sort mimosa pudica : experiment of light stimulation of plant movements
publishDate 2018
url http://hdl.handle.net/10356/75125
_version_ 1759856039678705664