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kayjay
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What Do You Call This Phenomenon?

So I have this healthy little zucchini seedling.

Image

I checked on it late at night, lights were out, and it did this:

Image

It folded up its cotyledons. I wanted to google around and figure out how common that was, if it's normal, etc, but I couldn't even come up with the right keywords. Anyway, it's back to normal today for its sun bath, it seems happy, I'm just curious what that was.
KayJay
Toronto 'burbs, zone 5b

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applestar
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Re: What Do You Call This Phenomenon?

...sleeping?... :>

--- sorry, I feel like I should know this word, but I can't think of it. :roll:
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imafan26
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Re: What Do You Call This Phenomenon?

Here if a flower or plant sleeps, it means it is dead.
Nyctinasty is the technical term when some plants' flowers or leaves close at night. It is a circadium rhythm thing that they do that. Certain cells in the plant are able to change their shape in response to the different spectrum of light. Blue light in the daytime keep the leaves open and red light at dusk and night will make them close.

It has to do with the action of the potassium pump in specialized cells located at the joint of the leaves called the pulvini that passively pumps water in and out of the cells through osmosis and acts like the hinges of a door popping the leaves up and down.

P.S. I really did not know all this stuff. I looked it up and this is just the simplified version.
Happy gardening in Hawaii. Gardens are where people grow.

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applestar
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Re: What Do You Call This Phenomenon?

"Nyctinasty" ...what a funny word :roll:

...nope, I don't think I knew it... How could I forget if I did. :lol:
Learning never ends because we can share what we've learned. And in sharing our collective experiences, we gain deeper understanding of what we learned.

imafan26
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Re: What Do You Call This Phenomenon?

It is a funny word and probably one most of us would not even use much. Another word you don't hear often is cauliferous.
It is where flowers and fruit form on the trunk of the tree instead of the branch tips.
Happy gardening in Hawaii. Gardens are where people grow.

Taiji
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Re: What Do You Call This Phenomenon?

Fer a minute I thought he or she had a Venus flytrap! :)

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kayjay
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Re: What Do You Call This Phenomenon?

Cool, thanks! Good to know.

Applestar, that's what I called it at first. I saw it and showed my fiance. "Hey, check it out! It went ni-night!!" :P
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Toronto 'burbs, zone 5b

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jal_ut
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Re: What Do You Call This Phenomenon?

Heliotropism
Gardening at 5000 feet elevation, zone 4/5 Northern Utah, Frost free from May 25 to September 8 +/-

imafan26
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Re: What Do You Call This Phenomenon?

Heliotropism is the diurnal motion of plants moving in response to the direction of the sun.

Nyctinasty is the diurnal response to the onset of night which would be the opposite of heliotropism.
Happy gardening in Hawaii. Gardens are where people grow.

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