Timeline for Can plants have too much light, or do they need night/rest?
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| Jul 20, 2016 at 2:59 | history | edited | Sue Saddest Farewell TGO GL | CC BY-SA 3.0 |
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| Feb 13, 2012 at 22:13 | comment | added | WienerDog | I would try asking in Biology something like: "Does the photosynthetic 'dark reaction' require the lack of light?" I'm not sure on the answer, I have heard that the lack of 'night' doesn't matter and a plant will undergo them anyways, but I haven't seen this confirmed by a scientific article. It must be true in some sense since there are plants that do survive in 24 hour light. | |
| Feb 13, 2012 at 20:26 | comment | added | Synetech |
> You could always do your own experiment and post your results here. Yes, I’m sure she’d love that. “Sorry mom, I killed your garden, but at least I’m half done the test. Can’t wait for next winter!” :-D > Biology especially would have the answer on a molecular level Perhaps, but I suspect it would be more about photosynthesis in general as opposed to plant-specific light needs. Re: skeptics; MythBusters did a test about plants and sound that had interesting results. Perhaps I should post a request to test plants and light on the DC boards. :-)
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| Feb 13, 2012 at 20:21 | comment | added | WienerDog | You could always do your own experiment and post your results here. :) If you are looking for a more in depth answer on this subject I would ask at either biology.stackexchange.com or skeptics.stackexchange.com. Biology especially would have the answer on a molecular level (if one is known). | |
| Feb 13, 2012 at 20:13 | comment | added | Synetech | > I don't suspect it was the light itself as much as it was the heat generated by the lamps. Yes, but those are usually 100’sW halogen or metal-halide lamps. This is a 13W CFL that is quite cool. > In addition, plants also require both dark and light ("photo"-) periods. Exactly. Any living thing that has evolved in a place where there is night should not handle constant daytime too well. > The optimum photo/dark period ratio depends on the species and variety of plant. That’s the research part I was dreading. | |
| Feb 13, 2012 at 20:00 | comment | added | WienerDog | I did find this off of Wikipedia which may interest you. "In addition, plants also require both dark and light ("photo"-) periods. Therefore, lights may be turned on or off at set times. The optimum photo/dark period ratio depends on the species and variety of plant, as some prefer long days and short nights and others prefer the opposite or intermediate 'day lengths'." | |
| Feb 13, 2012 at 19:59 | comment | added | WienerDog | Any light, even artificial light gives off heat (infrared). Of course certain lights give off less heat than others. For the tomatoes in the study I don't suspect it was the light itself as much as it was the heat generated by the lamps. | |
| Feb 13, 2012 at 19:43 | comment | added | Synetech | Well like I said, sun isn’t really the issue. In winter in Canada, there is sun, but it is not particularly strong, so sun burn isn’t the problem; lack of “sleep” is what I’m wondering about, ie, “burn out ”. | |
| Feb 13, 2012 at 19:39 | comment | added | WienerDog | As far as I can tell, plants that are especially sensitive to too much sun (tomatoes, some peppers) I wouldn't grow under continuous light. However if a plant isn't particularly sensitive to too much light (corn, sunflowers, cabbage) they probably would do better, or have no effect to growth in the worst case. Plants are such a diverse group of organisms that you will rarely find anything that they all share in common. | |
| Feb 13, 2012 at 19:33 | comment | added | Synetech |
Unfortunately I was afraid that would be the case. The few discussions I could find mentioned something along those lines. Sadly this answer is likely correct. Sadly because it means a bunch of research. :-( Is there a good resource to find out this kind of information? It would be really frustrating if it requires randomly searching the Internet for each and every kind of plant. (Re: giant cabbage; imagine the size of the kids in that patch!) :-D
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| Feb 13, 2012 at 19:31 | history | edited | WienerDog | CC BY-SA 3.0 |
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| Feb 13, 2012 at 19:23 | history | answered | WienerDog | CC BY-SA 3.0 |