NPQ1 — Arabidopsis thaliana
Summary
AT1G08550 (NPQ1) in Arabidopsis thaliana encodes a violaxanthin de-epoxidase with NAD(P)H dehydrogenase (quinone) activity, a calycin family protein containing a VDE domain and lipocalin conserved site. The gene product localises to the chloroplast thylakoid lumen and photosystem II, and is associated with the xanthophyll cycle, energy quenching, heat dissipation, and photosystem II assembly. NPQ1 is associated with zeaxanthin biosynthesis, violaxanthin de-epoxidation, photoinhibition sensitivity, chloroplast avoidance movement, and stomatal response to light. The gene has been connected to traits including zeaxanthin and lutein content, photosynthetic rate and ability, quantum yield, chlorophyll content, seed longevity, leaf thickness, and plant growth and development. Associations also include drought tolerance, high light tolerance, basal thermotolerance, and photooxidative stress tolerance.
Annotations
- Chromosome
- 1
- Related genes
- NPQ1, LTO1
- GO terms
- homeostasis, Heat Dissipation, protein synthesis, Energy Quenching, Chlorophyll Fluorescence, NO storage, neoxanthin anabolism, Light Absorption
- Publications
- 16913871, 20964339, 20100799, 19011000, 27446097, 27076397, 22771437, 25747136
- Traits
- drought tolerance, photoinhibition sensitivity, Extreme High Light Sensitivity, Leaf Bleaching Under Light Stress, Partially Restores NPQ Defects, Decreased Rosette Size, Altered Chlorophyll Fluorescence, Impaired Xanthophyll Cycle, Photoinhibition Sensitivity, Lacks Both Zeaxanthin and Tocopherols, Reduced Nonphotochemical Quenching, Absent Zeaxanthin Formation, Reduced Photosynthetic Efficiency, Stunted Growth in Fluctuating Light