B1 — Zea mays
Summary
ZmB1 (ZM00001EB428470) on maize chromosome 10 encodes a beta-carotene 3-hydroxylase (EC 1.14.15.24) with a BETA-OHASE-like domain and fatty acid hydroxylase family membership, and is annotated for iron and metal binding. The gene is associated with carotenoid metabolism, including carotene and astaxanthin anabolism, vitamin A anabolism, and carotenoid breakdown, as well as photoprotection, pigmentation, and chloroplast membrane localization. It is linked to multiple agronomic traits, including grain color, endosperm color, carotenoid, lutein, zeaxanthin, and carotene content, grain weight and yield, plant height, leaf angle, anthesis time, heterosis, and tolerance to cold and drought. Observed phenotypes include altered seed and leaf carotenoid profiles with increased beta-carotene-derived xanthophylls, reduced seed carotenoids, and changes in nonphotochemical quenching.
Annotations
- Chromosome
- 10
- Related genes
- B1, B2
- GO terms
- syngamy, CRISPR-cas System, taste, vision, Memory, Short-term Memory, Learning, vitamin A anabolism
- Publications
- 21388418, 25793376, 25781018, PMID:20221689, PMID:23396829, PMID:31010822, PMID:18650403, PMID:42109302
- Traits
- β-carotene accumulation, seed germination, Reduced carotenoid levels in seeds, decreased xanthophyll content, Reduced xanthophyll synthesis in leaves, altered carotenoid composition, High lutein content, Severely reduced non-photochemical quenching (NPQ), Reduced Beta-Carotene to Beta-Xanthophyll Conversion, Normal chlorophyll a/b ratio