P.stipticus can oxidise firefly luciferin? That's pretty weird, when I
looked it up a few years back the available research suggested a totally
different system!
Also, I would number among the glowing plant sceptics. There's a good
reason that bioluminescence is only observed in higher trophic groups;
the lowest groups (plants) have to actually work for their sugar, and
can't afford to fritter it away on glowing. Perhaps there's a plant out
there in an exotic jungle somewhere that has a gently glowing flower at
night to attract moths, but given how useful that would be and how it
appears totally absent in nature as we know it, the costs must simply be
too high.
Bioluminescence is pretty efficient, but (like warm-bloodedness) it's a
constant expense. For phototrophs, that's a hard sell. I know some algae
do occasionally luminesce, but never (to my knowledge) constitutively,
and algae often have more efficient photosynthesis pathways, or
moonlight as *vores when the opportunity arises. They can afford the
expense if it means they can dissuade algavores from grazing at night.
I expect that both groups will make glowing plants eventually, but that
those plants won't grow, breed or survive well. Perhaps they'd do OK in
a hydroponic setting with added sugar, but to make that convenient (e.g.
not prone to becoming contaminated and smelly) it may have to be an odd
sugar that the plants are engineered to digest, but bacteria cannot.
Lots of work in that direction.
Perhaps what we should be looking at is animals that can be made into
nightlights, instead? Domesticated glowbugs, anyone? Or bioluminescent
cave fish?
On 03/06/14 05:41, Sebastian Cocioba wrote:
> I got some P. Stipticus fungus from a kit and had it growing on a new
> roll of toilet paper. It takes a while to get used to the light but once u
> fully dark adapt you can see it glow blue...barely. Constitutive glow isn't
> seen brightly in nature and maybe for good reason. If you apply topical
> luciferin ($200/mg) it will glow like all hell as with any plant
> transformed with luciferase. Its used as a marker routinely. One day we
> will crack natures limit on energetically heavy glow via oxygen-dependent
> lux. Till then its all smoke, mirrors, and literally camera trickery. Damn
> plants and their lack of copious amounts of ATP!
>
> Ill snap a long picture once I get my hands on a nice camera. Until then I
> can only describe it as faint but bright enough to see contours and details
> of the filaments and hyphae on the roll of TP. The vibrio plasmid shocked
> into e coli is much brighter.
>
> Sebastian S. Cocioba
> CEO & Founder
> New York Botanics, LLC
> Plant Biotech R&D
> ------------------------------
> From: Josiah Zayner <
josiah...@gmail.com>
> <
https://groups.google.com/>). So I really wanted to see what a 30 second
> exposure was like because normally on cameras the exposure time is a
> fraction of a second. So I grabbed my camera and took a piece of a plant
> and put it in a really dark room. I took one exposure at ISO 3600 at 1
> second and the picture was totally dark(first picture below)(Glowing plant
> uses ISO 4000 so I was trying to be close to that) . Then I took one at 30
> seconds and you can see stuff, WHOA! 30 seconds is a looooong exposure and
> basically makes any tiny amount of light seem huge. I literally could not
> see the flower with my eyes that you see in the second image! I can't even
> imagine that one could see the plant glow with the naked eye if that is
> only how bright it is at 30 second exposure. But maybe barely?
>
>
> Here is a URL with the photos in case they don't load in the email:
>
https://docs.google.com/document/d/1k9Zag5uwCZO4k46FLewF0q5XUEWShRJSn8w1O4ZPkLk/edit?usp=sharing
>
>
> <
https://lh5.googleusercontent.com/-c5jMqEGszhw/U41LvAvHVMI/AAAAAAAADiU/m2vnccxODqI/s1600/1sec.jpg>
>
>
> <
https://lh5.googleusercontent.com/-JU5sD8pkAy8/U41Lk108cKI/AAAAAAAADiI/d3LJ2R8-YbE/s1600/30sec.jpg>
>> ------------------------------
>> From: Koeng <javascript:>
>> Sent: 6/2/2014 10:17 PM
>> To:
diy...@googlegroups.com <javascript:>
>> Subject: [DIYbio] Re: Bioglowtech news
>>
>> I am curious how the glowing plant project got past their patents. Anyone
>> know?
>>
>> On Monday, June 2, 2014 1:45:35 PM UTC-7, Mega [Andreas Stuermer] wrote:
>>>
>>> Hi!
>>>
>>> Seems the patent holder of glowing plants succeeded in enhancing the
>>> bacterial lux operon. Maybe with directed evolution, fluorescent proteins
>>> or some other stuff (duplicating lux genes?) .
>>>
>>>
http://www.bioglowtech.com/news.html
>>>
>>> The before-after picture looks awesome!!
>>>
>>>
>>>
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> .
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