Carotenoids in photosynthesis: absorption, transfer and dissipation of light energy

Mimuro, Mamoru; Katoh, Takahiro

doi:10.1351/pac199163010123

Cited by 82 publications

(48 citation statements)

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“…Cell growth and fission inhibition, as well as morphological changes and blocking of chlorophyll a synthesis, were recorded at 10 mg/L concentration of detergent of household synthetic abstergent (HSA) [17]. When β-carotene is treated with a high concentration of detergent [18] this might cause loss of the native configuration [18]. Higher plant thylakoid membranes can be fractionated with various detergents [19].…”

Section: Discussionmentioning

confidence: 99%

The effect of detergent as polluting agent on the photosynthetic activity and chlorophyll content in bean leaves

Jovanić¹,

Bojović²,

Panic³

et al. 2010

Health

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Section: Discussionmentioning

confidence: 99%

The effect of detergent as polluting agent on the photosynthetic activity and chlorophyll content in bean leaves

Jovanić¹,

Bojović²,

Panic³

et al. 2010

Health

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“…This contradiction can be resolved by assuming that the pigments are bound to trimeric complexes as previously proposed on the basis of spectroscopic and crosslinking results [ l l , 381. An alternative explanation can be hypothesized on the basis of recent work with Fucoxanthinchlorophyll a-c-protein assembly [2] in which xanthophyll was shown to be mainly bound at the interface between chlorophyll a-c polypeptides: if part of carotenoids in higher plants pigment-proteins is adherent at the polypeptide interface rather than deeply buried in the protein backbone, then the stoichiometry of this pigment subset could be less defined. Another common characteristic of minor complexes is having p-carotene accounting for around 5 % of total carotenoids.…”

Section: Minor Complexesmentioning

confidence: 99%

Carotenoid‐binding proteins of photosystem II

Bassi

Pineau²,

Dainese

et al. 1993

European Journal of Biochemistry

412

276

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The distribution of the photosynthetic pigments of the chlorophyll-binding proteins or photosystem-II membranes, isolated from dark-adapted maize leaves was determined. Most (80%) of a xanthophyll, violaxanthin, was found in the three minor chlorophyll-ulb proteins CP24, CP26 and CP29 whose function is unknown. Violaxanthin is the precursor of zeaxanthin, which is involved in dissipating excess excitation energy into heat [Demmig-Adams, B. (1991) . We propose that a role for the minor photosystem-II chlorophyll-ulb proteins is the regulation of energy transfer to the reaction centre. It was also confirmed that the photosystem I1 reaction centre (Dl-D2-~ytochrome b5.59) contains pcarotene as the only carotenoid. However, the two other chlorophyll-a-binding proteins of photosystem 11, CP47 and CP43, bind not only p-carotene, but also the xanthophyll lutein, previously thought to be restricted to chlorophyll-ulb proteins.In green plants, light harvesting and photosynthetic electron transport occur in the thylakoids, which are the predominant membranes in plant leaf cells representing up to 80% of the total membrane [l] in a mesophyll cell. Thylakoids are organized into two major functional regions : the appressed or grana membranes and the non-appressed or stroma membranes, which contain different electron-transport components and pigment-binding complexes participating in the photosynthetic process.In both membrane domains, the photosynthetic pigments have four functions : light harvesting, energy transfer, energy dissipation and charge separation [2-41. Charge separation is restricted to the primary chromophore chlorophyll a, while photoprotection through energy dissipation is a carotenoid function, owing to the low energy levels of their triplet states with respect to those of chlorophyll. The role of the pigments in each of the functions listed above depends on the different features of their molecular structures. For example, energy transfer from carotenoids to chlorophylls occurs through singlet-singlet excitation-energy transfer while triplet-triplet interactions are involved in photoprotection. The characteristics of the energetic transitions involved are determined by the covalent molecular structure of the pigments and by their interactions with the polypeptides to which they are bound. The latter can be regarded as a fine tuning process to modify their function. The properties of the photosynthetic pigments in vivo are different from those in solution, the absorbance Abbreviations. PSII core, chlorophyll a complex containing D1, D2, cytochrome b559, CP43, CP47 ; Cab, chlorophyll-u/b proteins; CP, chlorophyll-protein complex; PSII, photosystem I1 ; LHCII, the major light-harvesting complex of PSII; 0. E. E., oxygen evolving enhancer.ste 75, 1-35121 Padova, Italy maxima being red-shifted up to about 30 nm, probably due to the influence of charged residues in the polypeptide(s) [5]; however, shifts due to a transmembrane electric field caused by a pH gradient have also been reported, accounting for a poss...

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“…The physiological functions of carotenoids in photo-autotrophs are related to the photosynthetic process. Carotenoids participate in the collection of light energy (photosynthetic active radiation, PAR, λ = 400-700 nm) and its transfer to chlorophyll for photosynthesis, and act as photo-protectors by both dissipating the excessive energy that could damage the cholophyll molecule, and inhibiting the formation of ROS (Mimuro and Katoh, 1991;Demmig-Adams et al, 1996). In heterotrophic microorganisms, carotenoid production is not as essential as in photoautotrophic microbes which need protection from direct light (Goodwin, 1980), yet carotenoids are widely distributed in extremophiles.…”

Section: Importance Of Light Radiation For Carotenoid Production and mentioning

confidence: 99%

Carotenoids in Aquatic Ecosystems and Aquaculture: A Colorful Business with Implications for Human Health

2017

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The colorful carotenoid pigments are known as biological active compounds that have beneficial effects on the metabolism of animals and humans. Carotenoids provide protection against several stressors, including UV radiation, reactive oxygen species and free radicals, have important roles in vision, and act as precursors of transcription regulators and in the immune system. Studies on human nutrition point to the relevance of consuming functional foods instead of supplementing the human diet with the desired nutrients. This stresses the importance of obtaining dietary items with high quality nutritional value for human consumption. The various biological roles of carotenoids in aquatic animals ascribes them a major role in aquaculture where they are routinely added to ensure the development and health of fish such as salmon, trout and red porgy, and of shellfish like shrimp and lobster. In aquaculture, it is widely recognized that fish larvae dramatically increase their survival rate when reared on live feeds (e.g., rotifers, Artemia sp. and copepods) containing carotenoids. Ultimately, pigmentation provided by carotenoids is one of the relevant quality attributes of the aquatic animal for consumer acceptability and market value. Appropriate feeds for aquaculture are thus required to provide the carotenoids necessary for the desired pigmentation. In this review, we discuss the role of carotenoids in aquatic food webs, both in the wild and in aquaculture, and its relevance for human health.

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Carotenoids in photosynthesis: absorption, transfer and dissipation of light energy

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Cited by 82 publications

References 0 publications

The effect of detergent as polluting agent on the photosynthetic activity and chlorophyll content in bean leaves

The effect of detergent as polluting agent on the photosynthetic activity and chlorophyll content in bean leaves

Carotenoid‐binding proteins of photosystem II

Carotenoids in Aquatic Ecosystems and Aquaculture: A Colorful Business with Implications for Human Health

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