A thylakoid is a membrane-bound compartment inside chloroplasts and cyanobacteria. They are the site of the light-dependent reactions of photosynthesis. Thylakoids consist of a thylakoid membrane surrounding a thylakoid lumen. Chloroplast thylakoids frequently form stacks of disks referred to as grana (singular: granum). Grana are connected by int...
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(from the article `metabolism`) ...generates ATP by a mechanism that is similar in principle, if not in detail. The organelles responsible are different from mitochondria, but they ... ...through much of the length of the chloroplast. Examination of cross sections of lamellae under the electron microscope shows that their edges are ... ...
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<plant biology> Membranous cisternae of the chloroplast, found as part of the grana and also as single cisternae interconnecting the grana. Contain the photosynthetic pigments, reaction centres and electron transport chain. Each thylakoid consists of a flattened sac of membrane enclosing a narrow intra thylakoid space. ... (18 Nov 1997) ...
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Photosynthetic lamella; the internal membrane of chloroplasts, with which chlorophyll is associated.
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thylakoid Any of a group of chlorophyll-containing membranous structures resembling sacs in which photosynthesis takes place. Thylakoids are stacked one on top of the other in the chloroplast layers grana (in which the green pigment chlorophyll is contained) of most plants.
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