Botany: A record-breaking pollen catapult
The release of stored elastic energy often drives rapid movements in animal systems1, 2, and plant components employing this mechanism should be able to move with similar speed. Here we describe how the flower stamens of the bunchberry dogwood (Cornus canadensis) rely on this principle to catapult p...
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ftoberlincollege:oai:digitalcommons.oberlin.edu:faculty_schol-4525 2023-05-15T18:30:51+02:00 Botany: A record-breaking pollen catapult Edwards, Joan Whitaker, Dwight Klionsky, Sarah Laskowski, Marta 2005-05-12T07:00:00Z https://digitalcommons.oberlin.edu/faculty_schol/3526 https://doi.org/10.1038/435164a English eng Digital Commons at Oberlin https://digitalcommons.oberlin.edu/faculty_schol/3526 https://dx.doi.org/10.1038/435164a Faculty & Staff Scholarship Biology text 2005 ftoberlincollege https://doi.org/10.1038/435164a 2022-11-26T18:27:09Z The release of stored elastic energy often drives rapid movements in animal systems1, 2, and plant components employing this mechanism should be able to move with similar speed. Here we describe how the flower stamens of the bunchberry dogwood (Cornus canadensis) rely on this principle to catapult pollen into the air as the flower opens explosively3, 4, 5. Our high-speed video observations show that the flower opens in less than 0.5 ms — to our knowledge, the fastest movement so far recorded in a plant. Cornus canadensis grows in dense carpets in the vast spruce-fir forests of the North American taiga. As bunchberry flowers burst open, their petals rapidly separate and flip back to release the stamens (Fig. 1). During the first 0.3 ms, the stamens accelerate at up to 24,000plusminus6,000 m s-2 (2,400g), reaching the high speed (3.1plusminus0.5 m s-1) necessary to propel pollen, which is light and rapidly decelerated by air resistance (terminal velocity, 0.12plusminus0.03 m s-1 (meanplusminuss.e.m.); n=7). The pollen granules are launched to an impressive height of 2.5 cm (range, 2.2–2.7 cm; n=5), which is more than ten times the height of the flower: from this height, they can be carried away by the wind. (For methods and movies, see supplementary information.) Text taiga Digital Commons at Oberlin (Oberlin College) Nature 435 7039 164 164 |
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Digital Commons at Oberlin (Oberlin College) |
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Biology |
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Biology Edwards, Joan Whitaker, Dwight Klionsky, Sarah Laskowski, Marta Botany: A record-breaking pollen catapult |
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Biology |
description |
The release of stored elastic energy often drives rapid movements in animal systems1, 2, and plant components employing this mechanism should be able to move with similar speed. Here we describe how the flower stamens of the bunchberry dogwood (Cornus canadensis) rely on this principle to catapult pollen into the air as the flower opens explosively3, 4, 5. Our high-speed video observations show that the flower opens in less than 0.5 ms — to our knowledge, the fastest movement so far recorded in a plant. Cornus canadensis grows in dense carpets in the vast spruce-fir forests of the North American taiga. As bunchberry flowers burst open, their petals rapidly separate and flip back to release the stamens (Fig. 1). During the first 0.3 ms, the stamens accelerate at up to 24,000plusminus6,000 m s-2 (2,400g), reaching the high speed (3.1plusminus0.5 m s-1) necessary to propel pollen, which is light and rapidly decelerated by air resistance (terminal velocity, 0.12plusminus0.03 m s-1 (meanplusminuss.e.m.); n=7). The pollen granules are launched to an impressive height of 2.5 cm (range, 2.2–2.7 cm; n=5), which is more than ten times the height of the flower: from this height, they can be carried away by the wind. (For methods and movies, see supplementary information.) |
format |
Text |
author |
Edwards, Joan Whitaker, Dwight Klionsky, Sarah Laskowski, Marta |
author_facet |
Edwards, Joan Whitaker, Dwight Klionsky, Sarah Laskowski, Marta |
author_sort |
Edwards, Joan |
title |
Botany: A record-breaking pollen catapult |
title_short |
Botany: A record-breaking pollen catapult |
title_full |
Botany: A record-breaking pollen catapult |
title_fullStr |
Botany: A record-breaking pollen catapult |
title_full_unstemmed |
Botany: A record-breaking pollen catapult |
title_sort |
botany: a record-breaking pollen catapult |
publisher |
Digital Commons at Oberlin |
publishDate |
2005 |
url |
https://digitalcommons.oberlin.edu/faculty_schol/3526 https://doi.org/10.1038/435164a |
genre |
taiga |
genre_facet |
taiga |
op_source |
Faculty & Staff Scholarship |
op_relation |
https://digitalcommons.oberlin.edu/faculty_schol/3526 https://dx.doi.org/10.1038/435164a |
op_doi |
https://doi.org/10.1038/435164a |
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Nature |
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435 |
container_issue |
7039 |
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164 |
op_container_end_page |
164 |
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1766214462137696256 |