ArticlePlant physiology2011
Lutein from deepoxidation of lutein epoxide replaces zeaxanthin to sustain an enhanced capacity for nonphotochemical chlorophyll fluorescence quenching in avocado shade leaves in the dark.
Article in Plant physiology, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.
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Who cites it
16 citing papers in PubMed.
- In vivo detection of spectral reflectance changes associated with regulated heat dissipation mechanisms complements fluorescence quantum efficiency in early stress diagnosis.The New phytologist · 2025Article
- Photosynthetic and Photoprotective Responses to Steady-State and Fluctuating Light in the Shade-Demanding CropFrontiers in plant science · 2021Article
- The Responses of Light Reaction of Photosynthesis to Dynamic Sunflecks in a Typically Shade-Tolerant SpeciesFrontiers in plant science · 2021Article
- Plant Origin, but Not Phylogeny, Drive Species Ecophysiological Response to Projected Climate.Frontiers in plant science · 2020Article
- Effects of polyploidization on the contents of photosynthetic pigments are largely population-specific.Photosynthesis research · 2019Article
- Nitrogen starvation induces distinct photosynthetic responses and recovery dynamics in diatoms and prasinophytes.PloS one · 2018Article
- Engineering the lutein epoxide cycle intoProceedings of the National Academy of Sciences of the United States of America · 2017Article
- Grapevine Plasticity in Response to an Altered Microclimate: Sauvignon Blanc Modulates Specific Metabolites in Response to Increased Berry Exposure.Plant physiology · 2016Article
- Carotenoid metabolism and regulation in horticultural crops.Horticulture research · 2015Review
- Teaching about photosynthesis with simple equipment: analysis of light-induced changes in fluorescence and reflectance of plant leaves.Photosynthesis research · 2013Article
- Decreased photochemical efficiency of photosystem II following sunlight exposure of shade-grown leaves of avocado: because of, or in spite of, two kinetically distinct xanthophyll cycles?Plant physiology · 2013Article
- Effects of altered α- and β-branch carotenoid biosynthesis on photoprotection and whole-plant acclimation of Arabidopsis to photo-oxidative stress.Plant, cell & environment · 2013Article
- From ecophysiology to phenomics: some implications of photoprotection and shade-sun acclimation in situ for dynamics of thylakoids in vitro.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2012Review
- Chlorophyll a fluorescence induction: a personal perspective of the thermal phase, the J-I-P rise.Photosynthesis research · 2012Review
- Modulation of photosynthetic energy conversion efficiency in nature: from seconds to seasons.Photosynthesis research · 2012Review
- Thermal energy dissipation and xanthophyll cycles beyond the Arabidopsis model.Photosynthesis research · 2012Review
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3 authors.
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No grant is acknowledged in the PubMed record.
Abstract
Leaves of avocado (Persea americana) that develop and persist in deep shade canopies have very low rates of photosynthesis but contain high concentrations of lutein epoxide (Lx) that are partially deepoxidized to lutein (L) after 1 h of exposure to 120 to 350 μmol photons m(-2) s(-1), increasing the total L pool by 5% to 10% (ΔL). Deepoxidation of Lx to L was near stoichiometric and similar in kinetics to deepoxidation of violaxanthin (V) to antheraxanthin (A) and zeaxanthin (Z). Although the V pool was restored by epoxidation of A and Z overnight, the Lx pool was not. Depending on leaf age and pretreatment, the pool of ΔL persisted for up to 72 h in the dark. Metabolism of ΔL did not involve epoxidation to Lx. These contrasting kinetics enabled us to differentiate three states of the capacity for nonphotochemical chlorophyll fluorescence quenching (NPQ) in attached and detached leaves: ΔpH dependent (NPQ(ΔpH)) before deepoxidation; after deepoxidation in the presence of ΔL, A, and Z (NPQ(ΔLAZ)); and after epoxidation of A+Z but with residual ΔL (NPQ(ΔL)). The capacity of both NPQ(ΔLAZ) and NPQ(ΔL) was similar and 45% larger than NPQ(ΔpH), but dark relaxation of NPQ(ΔLAZ) was slower. The enhanced capacity for NPQ was lost after metabolism of ΔL. The near equivalence of NPQ(ΔLAZ) and NPQ(ΔL) provides compelling evidence that the small dynamic pool ΔL replaces A+Z in avocado to "lock in" enhanced NPQ. The results are discussed in relation to data obtained with other Lx-rich species and in mutants of Arabidopsis (Arabidopsis thaliana) with increased L pools.
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