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Author Topic: What happens if you move daisies to southern hemisphere?  (Read 1230 times)

Offline David Cooper

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Some flowers track the sun across the sky, though I don't know if they continue to track it when it's cloudy so that they're already pointing at it when it comes back out. If they do track it by using a timer of some kind, what happens if you move them to the southern hemisphere? Do they learn to go the other way. I don't want to restrict this to daisies, but merely named them because their original name was day's eye, although that may for all I know have more to do with them closing when it's cloudy and opening again when the sun comes out.

The main reason I'm interested in this question though is that I was thinking about the idea of a rotating roof (on a large underground house) which follows the sun to keep its solar panels pointing the right way, but the idea would also be to have the solar panels hidden by vegetation and sloping down into pits so that the house is invisible to people passing it (unless they're very close) so that all they'd see is what looks like a wild flower meadow, and this led me to wonder if the rotation would cause any problems for the flowers.


 

Offline evan_au

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Re: What happens if you move daisies to southern hemisphere?
« Reply #1 on: 15/06/2013 20:45:21 »
Immature sunflowers follow the Sun, and I have seen them growing quite successfully in Australia. Apparently the tracking continues even when it is cloudy.

Of more concern is that mature sunflowers don't follow the Sun, and tend to face east. Would the "ground" following the Sun upset them?

See: https://en.wikipedia.org/wiki/Sunflower#Heliotropism_misconception
 

Offline David Cooper

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Re: What happens if you move daisies to southern hemisphere?
« Reply #2 on: 16/06/2013 21:09:21 »
Thanks for the lead - heliotropism is the search term I needed, and it looks as if it shouldn't be a problem. https://en.wikipedia.org/wiki/Heliotropism

Just need to do the experiment... I'll get back to you on that some day/decade.
 

The Naked Scientists Forum

Re: What happens if you move daisies to southern hemisphere?
« Reply #2 on: 16/06/2013 21:09:21 »

 

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