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Neoxanthin

Neoxanthin
all-''trans'' Neoxanthin

Neoxanthin is a carotenoid and xanthophyll. In plants, it is an intermediate in the biosynthesis of the plant hormone abscisic acid. It is often present in two forms: all-trans and 9-cis isomers. It is produced from violaxanthin, but a suspected neoxanthin synthase is still to be confirmed. Two different genes were confirmed to be implied in violaxanthin conversion to neoxanthin in Arabidopsis and tomato. It has a specific role in protection against photooxidative stress. It is a major xanthophyll found in green leafy vegetables such as spinach.

References

References

  1. (2000). "Identification of neoxanthin synthase as a carotenoid cyclase paralog". European Journal of Biochemistry.
  2. (2007). "The Arabidopsis ABA-deficient mutant aba4 demonstrates that the major route for stress-induced ABA accumulation is via neoxanthin isomers". Plant Journal.
  3. (2014). "The tomato mutation nxd1 reveals a gene necessary for neoxanthin biosynthesis and demonstrates that violaxanthin is a sufficient precursor for abscisic acid biosynthesis". Plant Journal.
  4. (2007). "The Arabidopsis aba4-1 mutant reveals a specific function for neoxanthin in protection against photooxidative stress". Plant Cell.
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carotenoids epoxides cumulated-dienes
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