Question about emersed grow plants! - The Planted Tank Forum
 
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post #1 of 3 (permalink) Old 07-06-2015, 04:55 PM Thread Starter
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Question about emersed grow plants!

Hey guys!
I know that many pet stores sell emersed grown plants; which are growing from tubs of water and are harvested when the stems come out of the water.
(Meaning there is no regulated humidity or anything). However, I heard somewhere that if I grow plants emersed, but in high humidity, the plants do not transition/do not need to transition when submerged (because they are growing in their submerged form when grown in high humidity). Is this actually true?
THANKS!
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post #2 of 3 (permalink) Old 07-06-2015, 06:00 PM
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I find it's hit and miss and also depends on the plants. I don't think humidity level in the emmersed state matters because it's nowhere close to being underwater.

I've done dry starts with HC and UG and never had any melting. I think the high CO2 level in the tank helped a lot.


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post #3 of 3 (permalink) Old 07-06-2015, 06:34 PM
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Hmm...I wouldn't think so. The plants do transition, but it also has to do with the waxy cuticle that covers the emersed form of plants. When in dry air, the cuticle of a plant is thick, limiting the water lost. When in humid air, the cuticle of a plant is thin, allowing more gas exchange. The thinner the cuticle, the better the plant will transition to submersed form, as the thinner cuticle allows more exchange between the plant and the water (water, CO2, light go into the plant; water, oxygen comes out of the plant).

However, as TLE said, it might not work. I'm assuming that between plants at 0% humidity (very dry), and 100%humidity (very wet air), the plants at 100% humidity will have much thinner cuticles, allowing them to transition to their submersed form much faster.

So many fish to keep, not enough aquaria.
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