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Light-induced dynamic structural color

 
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ChrisR
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Joined: 14 Mar 2009
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Location: Near London, UK

PostPosted: Sat Apr 14, 2018 3:59 am    Post subject: Light-induced dynamic structural color Reply with quote

Fascinating alga Cystoseira tamariscifolia.
http://advances.sciencemag.org/content/4/4/eaan8917.full
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ldflan



Joined: 11 Mar 2017
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PostPosted: Fri Jul 27, 2018 2:23 pm    Post subject: Reply with quote

This is a fantastic piece of research and really elegant work. Thank you so much for pointing it out! Sure validates the continuing usefulness of light microscopy and imaging in a big way.

"The formation of an opaline structure ["OPCs"] from lipid microspheres is, as far as we are aware, unique to both the natural world and synthetic opals. The fact that the [cystoseira tamariscifolia] alga is able to form monodisperse spheres and control their packing structure is by itself surprising, but the fact that the alga is able to precisely change the packing structure from ordered to disordered, and in a reversible manner, is remarkable.

"The function of the OPCs for the alga also remains to be determined, but the position of the OPCs relative to the chloroplasts in the cell, together with the dynamics of the photonic properties, strongly indicates a photosynthetic role. . . . . It is well documented that chloroplasts in many other shade-adapted plants move to the periphery of the cell when exposed to high-light conditions to minimize light exposure (29). However, we believe that, in this alga, the chloroplasts may remain more static, with the OPC regulating the exposure of the chloroplasts to light instead."
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