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Strategies for a discontinuous future.












Saturday, January 31, 2004
 


You've probably read the piece by now about bioengineered flowers that change color when they're next to landmines. Unfortunately, most of the articles don't discuss the the technology behind it, which is very elegant:

"...The underlying biochemical mechanism by which the colour change of the genetically plants occurs is based on altering the regulation of the natural pigment biosynthetic pathways in the plants.

Plants normally go red or redish in autumn where the red pigments dominate over the green ones, or as a result of stressed growth conditions. The genetically engineered plants are modified in a way that only allows these plants to go red if triggered by a specific stimulus present in the soil.

The stimulus is unique to the plant dependent on the actual application that is pursued with the specific plant. Stimuli may be heavy metals, or NO2 that evaporates when explosives are reduced in the soil. Such stimuli trigger the production of a key-enzyme in the biochemical pathway responsible for production of the group of red pigments called anthocyanins. The resulting colour change is expected within 3-6 weeks dependent on the growth conditions".

The info's from here.



-- umair // 2:03 PM //


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