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File:Oxalis Triangularis Photonasty Timelapse.ogv

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Original file (Ogg Theora video file, length 5.7 s, 1,280 × 720 pixels, 4.59 Mbps, file size: 3.11 MB)

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Media of the day This file was selected as the media of the day for 31 July 2010. It was captioned as follows:
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.
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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.

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Description
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.
Date Taken on 12 June 2010
Source Own work
Author Richard Wheeler

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Date/TimeThumbnailDimensionsUserComment
current10:50, 22 June 20105.7 s, 1,280 × 720 (3.11 MB)Zephyris (talk | contribs){{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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Format Bitrate Download Status Encode time
VP9 720P 1.74 Mbps Completed 08:33, 6 September 2018 13 s
VP9 480P 808 kbps Completed 08:33, 6 September 2018 9.0 s
VP9 360P 481 kbps Completed 08:33, 6 September 2018 6.0 s
VP9 240P 271 kbps Completed 08:33, 6 September 2018 5.0 s
WebM 360P 525 kbps Completed 14:08, 9 February 2017 9.0 s
QuickTime 144p (MJPEG) 1.01 Mbps Completed 09:53, 12 October 2024 1.0 s

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