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Zeaxanthin

zeaxanthin

B,beta-carotene-3,3'-diol;a carotene found in corn, fruits, seeds, and egg yolk; isomeric with xanthophyll.

Synonym: zeaxanthol.

Origin: Mod. L. Zea, Indian corn, fr. L. Zea, grain _ G. Xanthos, yellow, _ -in


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how do proton pumps help regulate the size of stomata?

... involved in stomatal opening, but in this case a plasma membrane proton pump is involved, not one in the tylakoid membrane. When blue light hits zeaxanthin, it triggers an isomerisation reaction similar to that of retinal in the animal eye. This reaction triggers a membrane transduction reaction ...

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by MrMistery
Thu Jan 10, 2008 1:49 pm
 
Forum: Cell Biology
Topic: how do proton pumps help regulate the size of stomata?
Replies: 2
Views: 5178

Benifits of Blue & Red: Action/Absorption Spectrum, etc

... much as red by chlorophyll a -zeitlupe is a blue light receptor* -phototropin is a blue light receptor* -cryptochrome is a blue light receptor* -zeaxanthin is a blue receptive pigment that opens stoma in daylight -carotenoids absorb blue light and transfer the energy to chlorophyll b (helps offset ...

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by bta
Fri Jun 08, 2007 7:34 am
 
Forum: Botany Discussion
Topic: Benifits of Blue & Red: Action/Absorption Spectrum, etc
Replies: 4
Views: 10245

Phytochromes

... of unintrerupted darkness. how they do this depends on the kind of plant. this can be done either by phytochromes or by blue light receptors(zeaxanthin, cryptochrome and phototropin) hope this helps..

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by MrMistery
Sun Oct 08, 2006 7:16 pm
 
Forum: Botany Discussion
Topic: Phytochromes
Replies: 4
Views: 7467


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