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File:Oxalis Triangularis Photonasty Timelapse.ogv

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原始檔案 （Ogg Theora視訊檔，長度5.7秒，1,280 × 720像素，4.59 Mbps，檔案大小：3.11 MB）

每日媒體 本檔案當選為2010年7月31日的每日媒體。其說明如下：
English: Oxalis triangularis (Purple Shamrock) is a classic example of a plant which responds with movement to external stimulus. The leaves open and close in response to varying light levels with the result that they are open during during the day and close at night. This is true movement (i.e. not growth) and is non-directional with respect to the stimulus making it an example of nastic movement towards light: photonasty. One image captured every 30 seconds for about 1.5 hours, played back at 25 frames per second; ~750x actual speed. The exposure time was progressively increased through the video so the drop in ambient light levels are not seen.
其他語言
English: Oxalis triangularis (Purple Shamrock) is a classic example of a plant which responds with movement to external stimulus. The leaves open and close in response to varying light levels with the result that they are open during during the day and close at night. This is true movement (i.e. not growth) and is non-directional with respect to the stimulus making it an example of nastic movement towards light: photonasty. One image captured every 30 seconds for about 1.5 hours, played back at 25 frames per second; ~750x actual speed. The exposure time was progressively increased through the video so the drop in ambient light levels are not seen.
Македонски: Виолетова детелина (Oxalis triangularis) врши настија - ненасочено движење на растението како реакција на светлинските или атмосферските промени. Во овој случај детелината се отвора на дневна светлина, а се затвора ноќе.

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English: Oxalis triangularis (Purple Shamrock) is a classic example of a plant which responds with movement to external stimulus. The leaves open and close in response to varying light levels with the result that they are open during during the day and close at night. This is true movement (i.e. not growth) and is non-directional with respect to the stimulus making it an example of nastic movement towards light: photonasty. One image captured every 30 seconds for about 1.5 hours, played back at 25 frames per second; ~750x actual speed. The exposure time was progressively increased through the video so the drop in ambient light levels are not seen.
Македонски: Виолетова детелина (Oxalis triangularis) врши настија - ненасочено движење на растението како реакција на светлинските или атмосферските промени. Во овој случај детелината се отвора на дневна светлина, а се затвора ноќе.
日期 攝於2010年6月12日
來源 自己的作品
作者 Richard Wheeler

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目前2010年6月22日 (二) 10:505.7秒, 1,280 × 720（3.11 MB）Zephyris{{Information |Description={{en|1=Oxalis triangularis (also known as the love plant or purple shamrock) is a classic example of a plant which responds with movement to external stimulus. The leaves open and close in response to varying light levels with t

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取自「https://zh.wikipedia.org/wiki/File:Oxalis_Triangularis_Photonasty_Timelapse.ogv」