The preview version on Youtube is embedded below:
You can clearly see the cytoplasmic streaming involved in pollen tube tip elongation.
400x bright-field magnification, lighting at high level with low exposure times, 30fps video taken originally at 1 frame per second (30 seconds of tube growth activity = 1 second of video).
Video Download Details
Codec: H264 MPEG-4 AVC 4:2:0
Frame Rate: 30
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