About tips of plants closing up... - The Planted Tank Forum
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post #1 of 18 (permalink) Old 07-15-2010, 11:56 PM Thread Starter
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About tips of plants closing up...

I've noticed that after, say 8 to 8:30 (EST) at night, that the tips of some of the plants in my 75g high-tech close, or fold up. I notice this mostly with the Myriophyllum and Cabomba, but it also occurs with Rotala R., and much less so with the Ludwigia. I don't notice this with anything except stem-type plants.
I've been wondering about this. Is this signifying that this plant is done for the day? What does it mean? Is this an indication, that this is a great time for the lights to go off, and co2 to be cut?
I keep my photoperiod to around 8 hours, but have it set to cut off around 10 pm, so that i can enjoy the tank when i'm around.

Anyone have some insight into the plants closing up?
Thanks!


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post #2 of 18 (permalink) Old 07-15-2010, 11:57 PM
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I believe it happens when the plant has taken up all the nutrients and co2 it will for the day.

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post #3 of 18 (permalink) Old 07-16-2010, 01:47 AM Thread Starter
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So, then am i losing efficiency by running my lights/co2 past the point where these plants close up? Maybe use these plants as an "indicator" of sorts... Or should i disregard them, and trust that different plants have different uptake rates, and keep my 8 hour photoperiod where it's at?


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post #4 of 18 (permalink) Old 07-16-2010, 01:50 AM
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I'm not sure but I think the plants close up a few minutes before your light turns off so that they don't have to waste energy when the lights are out?
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post #5 of 18 (permalink) Old 07-16-2010, 01:50 AM
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From what I understand if you shut it down when the first plant closes up youre cheating all of the others of their full potential.

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post #6 of 18 (permalink) Old 07-16-2010, 02:38 AM
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plants have a "memory" and if the lights go off at a certain time everyday, they close up at the same time every day.
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post #7 of 18 (permalink) Old 07-16-2010, 02:54 AM Thread Starter
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Quote:
Originally Posted by timwag2001 View Post
plants have a "memory" and if the lights go off at a certain time everyday, they close up at the same time every day.
That's interesting....

I didn't always have my lights set to go off at 10pm. It used be an hour, or so, earlier. So if the "memory" theory is correct, that would would attribute the noticeable closing up of the plants while lights are on, whereas before, i noticed it only after lights out (w/ moonlights).
So, do you think that it is possible for plants to learn a new "memory", then? I've had it set at the current time for around a month now. I don't remember how long it was set at the previous photoperiod. In truth, i'm still experimenting with the photoperiods, and it's placement in the day. It's important for me to be able to enjoy the tank, while i'm at home, therefore, the major part of lights on, is while i'm around.


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post #8 of 18 (permalink) Old 07-16-2010, 02:58 AM
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it should. plants closing and opening is usually a responce to either lights or heat
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post #9 of 18 (permalink) Old 07-16-2010, 03:01 AM
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Here we did some research on the topic: https://www.plantedtank.net/forums/pl...em-plants.html

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post #10 of 18 (permalink) Old 07-16-2010, 03:42 AM Thread Starter
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Thanks for the link... i'm not sure how i missed this thread. I've been pondering over this quite some time.


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post #11 of 18 (permalink) Old 07-16-2010, 04:08 AM
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Finally an answer! I've been wondering about this for a long time...

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post #12 of 18 (permalink) Old 07-16-2010, 07:17 PM
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As Chad320 said, it means the plants are done for the day. They're no longer taking in light or nutrients.
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post #13 of 18 (permalink) Old 07-16-2010, 09:57 PM
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There is a great thread about it on the Barr report. I looked last night and cant find it anywhere if someone else remembers where its at please post the OP a link.

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post #14 of 18 (permalink) Old 07-16-2010, 10:04 PM
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The article also relates the uptake of nutriets and co2 into the equation and not solely photoperiod. From what I gathered some do it for photoperiod, but other will close when theyre done taking in its alotted amount of co2 for the day? I wish I could find that thread!!! TOM????

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post #15 of 18 (permalink) Old 07-16-2010, 11:11 PM
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Quote:
Originally Posted by chad320 View Post
There is a great thread about it on the Barr report. I looked last night and cant find it anywhere if someone else remembers where its at please post the OP a link.
This is it, I think.

http://www.barrreport.com/showthread...-CO2-lead-time
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