Evidence for the Existence of Two ^-Carotene Pools and Two Biosynthetic ^-Carotene Pathways in the Chloroplast
نویسنده
چکیده
Biosynthesis, Carotenoids, /?-Carotene, Photosynthesis Two /7-Carotene pools were obtained in the chloroplast. It is concluded that one pool is very small like a-carotene and responsible exclusively for the biosynthesis of /?-ionone-xanthophylls. The other ^-carotene pool is proposed to be the one, that is located close to photosystem I and is involved in photosynthesis as a light protecting agent for chlorophylls against photo-oxidation. Furthermore evidence is given that both /7-carotene pools are synthesized by independent biosyn thetic pathways.
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