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Related to thylakoid: Photosystem, granum


A saclike membrane in the chloroplasts of plant cells that is often arranged in stacks called grana and that is the site of the light reactions of photosynthesis.

[Greek thūlakos, sack + -oid.]


(Biology) a small membranous sac within a chloroplast of a plant


(ˈθaɪ ləˌkɔɪd)

a structure in the chloroplast of photosynthesizing cells, usu. one of an interconnected stack, having a pigmented membrane that is the site of photosynthesis.
[< German Thylakoid (1961) < Greek thȳlakoeidḗs resembling a bag =thylak(os) sack + -oēidēs -oid]
References in periodicals archive ?
The results of chlorophyll a fluorescence variables prove that plants subjected to abiotic stress, such as salinity, high temperatures, low relative humidity, among others, exhibit alterations in the functional state of the thylakoid membranes of chloroplasts, which cause changes in the characteristics of the fluorescence signals and, consequently, in quantum efficiency (Fv/Fm) and potential quantum yield ([Y.
Cold and heat reduced photosynthesis efficiency: The photosystem II (PSII) is a large pigment protein complex in thylakoid membrane that performs the vital reactions of photosynthesis.
Two types of solar cells with two photosensitizers: thylakoid membrane preparations and anthocyanin-enriched raspberry extracts have been studied.
Thylakoid membrane responses to moderately high leaf temperature in Pima Cotton.
Rodophyta tends to have a simple pigment composition with b-carotene, zeaxanthin and chlorophyll as the predominant thylakoid pigments (Grabowski et al.
These compounds can be found as single molecules (cytochrome c) or as part of large, enzymatic complexes that catalyze redox reactions, that is, photosystems I and II in the thylakoid membrane of chloroplasts, cytochrome P450 in the liver, and the electron-transport chain-reaction complex located in the inner mitochondrial membrane.
Glycine betaine (GB) is found in the chloroplast and plays an important role in osmotic adjustment, protection of thylakoid membrane, protecting chloroplast and photosynthesis system II (PSII) under stress conditions (Ashraf and Harris 2004).
The eleven selections that make up the main body of the text are devoted to chloroplast lipids, the assembly and degradation of pigment-binding proteins, the structural and functional dynamics of the thylakoid membrane system, and a wide variety of other related subjects.
Temperatures below 13[degrees]C and accentuated water deficits affect diverse components of the photosynthetic process because they reduce stomatal conductance, net photosynthesis, the photochemical efficiency of photosystem II, the efficiency of the electron transport chain in the thylakoid membrane, enzymatic activity and carbon metabolism, in addition to modifying the composition and structure of the photosynthetic pigment complexes, lipids and fatty acids, with different intensities recorded for different genotypes and species (Batista-Santos et al.
MGDGs are present in a wide range of plants, and plant galactosyl lipids constitute approximately 80% of the membrane lipids, of which MGDG is the most abundant one and accounts for approximately 50% of the thylakoid lipids.